1. 15 Nov, 2013 10 commits
    • Kirill A. Shutemov's avatar
      mm, hugetlb: convert hugetlbfs to use split pmd lock · cb900f41
      Kirill A. Shutemov authored
      
      
      Hugetlb supports multiple page sizes. We use split lock only for PMD
      level, but not for PUD.
      
      [akpm@linux-foundation.org: coding-style fixes]
      Signed-off-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      cb900f41
    • Kirill A. Shutemov's avatar
      mm, thp: do not access mm->pmd_huge_pte directly · c389a250
      Kirill A. Shutemov authored
      
      
      Currently mm->pmd_huge_pte protected by page table lock.  It will not
      work with split lock.  We have to have per-pmd pmd_huge_pte for proper
      access serialization.
      
      For now, let's just introduce wrapper to access mm->pmd_huge_pte.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Alex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c389a250
    • Kirill A. Shutemov's avatar
      mm, thp: move ptl taking inside page_check_address_pmd() · 117b0791
      Kirill A. Shutemov authored
      
      
      With split page table lock we can't know which lock we need to take
      before we find the relevant pmd.
      
      Let's move lock taking inside the function.
      Signed-off-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      117b0791
    • Kirill A. Shutemov's avatar
      mm, thp: change pmd_trans_huge_lock() to return taken lock · bf929152
      Kirill A. Shutemov authored
      
      
      With split ptlock it's important to know which lock
      pmd_trans_huge_lock() took.  This patch adds one more parameter to the
      function to return the lock.
      
      In most places migration to new api is trivial.  Exception is
      move_huge_pmd(): we need to take two locks if pmd tables are different.
      Signed-off-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      bf929152
    • Kirill A. Shutemov's avatar
      mm: introduce api for split page table lock for PMD level · 9a86cb7b
      Kirill A. Shutemov authored
      
      
      Basic api, backed by mm->page_table_lock for now. Actual implementation
      will be added later.
      Signed-off-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9a86cb7b
    • Kirill A. Shutemov's avatar
      mm: convert mm->nr_ptes to atomic_long_t · e1f56c89
      Kirill A. Shutemov authored
      
      
      With split page table lock for PMD level we can't hold mm->page_table_lock
      while updating nr_ptes.
      
      Let's convert it to atomic_long_t to avoid races.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e1f56c89
    • Kirill A. Shutemov's avatar
      mm: rename USE_SPLIT_PTLOCKS to USE_SPLIT_PTE_PTLOCKS · 57c1ffce
      Kirill A. Shutemov authored
      
      
      We're going to introduce split page table lock for PMD level.  Let's
      rename existing split ptlock for PTE level to avoid confusion.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Tested-by: default avatarAlex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      57c1ffce
    • Kirill A. Shutemov's avatar
      mm: avoid increase sizeof(struct page) due to split page table lock · e9bb18c7
      Kirill A. Shutemov authored
      
      
      Alex Thorlton noticed that some massively threaded workloads work poorly,
      if THP enabled.  This patchset fixes this by introducing split page table
      lock for PMD tables.  hugetlbfs is not covered yet.
      
      This patchset is based on work by Naoya Horiguchi.
      
      : akpm result summary:
      :
      : THP off, v3.12-rc2: 18.059261877 seconds time elapsed
      : THP off, patched:   16.768027318 seconds time elapsed
      :
      : THP on, v3.12-rc2:  42.162306788 seconds time elapsed
      : THP on, patched:    8.397885779 seconds time elapsed
      :
      : HUGETLB, v3.12-rc2: 47.574936948 seconds time elapsed
      : HUGETLB, patched:   19.447481153 seconds time elapsed
      
      THP off, v3.12-rc2:
      -------------------
      
       Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
      
          1037072.835207 task-clock                #   57.426 CPUs utilized            ( +-  3.59% )
                  95,093 context-switches          #    0.092 K/sec                    ( +-  3.93% )
                     140 cpu-migrations            #    0.000 K/sec                    ( +-  5.28% )
              10,000,550 page-faults               #    0.010 M/sec                    ( +-  0.00% )
       2,455,210,400,261 cycles                    #    2.367 GHz                      ( +-  3.62% ) [83.33%]
       2,429,281,882,056 stalled-cycles-frontend   #   98.94% frontend cycles idle     ( +-  3.67% ) [83.33%]
       1,975,960,019,659 stalled-cycles-backend    #   80.48% backend  cycles idle     ( +-  3.88% ) [66.68%]
          46,503,296,013 instructions              #    0.02  insns per cycle
                                                   #   52.24  stalled cycles per insn  ( +-  3.21% ) [83.34%]
           9,278,997,542 branches                  #    8.947 M/sec                    ( +-  4.00% ) [83.34%]
              89,881,640 branch-misses             #    0.97% of all branches          ( +-  1.17% ) [83.33%]
      
            18.059261877 seconds time elapsed                                          ( +-  2.65% )
      
      THP on, v3.12-rc2:
      ------------------
      
       Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
      
          3114745.395974 task-clock                #   73.875 CPUs utilized            ( +-  1.84% )
                 267,356 context-switches          #    0.086 K/sec                    ( +-  1.84% )
                      99 cpu-migrations            #    0.000 K/sec                    ( +-  1.40% )
                  58,313 page-faults               #    0.019 K/sec                    ( +-  0.28% )
       7,416,635,817,510 cycles                    #    2.381 GHz                      ( +-  1.83% ) [83.33%]
       7,342,619,196,993 stalled-cycles-frontend   #   99.00% frontend cycles idle     ( +-  1.88% ) [83.33%]
       6,267,671,641,967 stalled-cycles-backend    #   84.51% backend  cycles idle     ( +-  2.03% ) [66.67%]
         117,819,935,165 instructions              #    0.02  insns per cycle
                                                   #   62.32  stalled cycles per insn  ( +-  4.39% ) [83.34%]
          28,899,314,777 branches                  #    9.278 M/sec                    ( +-  4.48% ) [83.34%]
              71,787,032 branch-misses             #    0.25% of all branches          ( +-  1.03% ) [83.33%]
      
            42.162306788 seconds time elapsed                                          ( +-  1.73% )
      
      HUGETLB, v3.12-rc2:
      -------------------
      
       Performance counter stats for './thp_memscale_hugetlbfs -c 80 -b 512M' (5 runs):
      
          2588052.787264 task-clock                #   54.400 CPUs utilized            ( +-  3.69% )
                 246,831 context-switches          #    0.095 K/sec                    ( +-  4.15% )
                     138 cpu-migrations            #    0.000 K/sec                    ( +-  5.30% )
                  21,027 page-faults               #    0.008 K/sec                    ( +-  0.01% )
       6,166,666,307,263 cycles                    #    2.383 GHz                      ( +-  3.68% ) [83.33%]
       6,086,008,929,407 stalled-cycles-frontend   #   98.69% frontend cycles idle     ( +-  3.77% ) [83.33%]
       5,087,874,435,481 stalled-cycles-backend    #   82.51% backend  cycles idle     ( +-  4.41% ) [66.67%]
         133,782,831,249 instructions              #    0.02  insns per cycle
                                                   #   45.49  stalled cycles per insn  ( +-  4.30% ) [83.34%]
          34,026,870,541 branches                  #   13.148 M/sec                    ( +-  4.24% ) [83.34%]
              68,670,942 branch-misses             #    0.20% of all branches          ( +-  3.26% ) [83.33%]
      
            47.574936948 seconds time elapsed                                          ( +-  2.09% )
      
      THP off, patched:
      -----------------
      
       Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
      
           943301.957892 task-clock                #   56.256 CPUs utilized            ( +-  3.01% )
                  86,218 context-switches          #    0.091 K/sec                    ( +-  3.17% )
                     121 cpu-migrations            #    0.000 K/sec                    ( +-  6.64% )
              10,000,551 page-faults               #    0.011 M/sec                    ( +-  0.00% )
       2,230,462,457,654 cycles                    #    2.365 GHz                      ( +-  3.04% ) [83.32%]
       2,204,616,385,805 stalled-cycles-frontend   #   98.84% frontend cycles idle     ( +-  3.09% ) [83.32%]
       1,778,640,046,926 stalled-cycles-backend    #   79.74% backend  cycles idle     ( +-  3.47% ) [66.69%]
          45,995,472,617 instructions              #    0.02  insns per cycle
                                                   #   47.93  stalled cycles per insn  ( +-  2.51% ) [83.34%]
           9,179,700,174 branches                  #    9.731 M/sec                    ( +-  3.04% ) [83.35%]
              89,166,529 branch-misses             #    0.97% of all branches          ( +-  1.45% ) [83.33%]
      
            16.768027318 seconds time elapsed                                          ( +-  2.47% )
      
      THP on, patched:
      ----------------
      
       Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
      
           458793.837905 task-clock                #   54.632 CPUs utilized            ( +-  0.79% )
                  41,831 context-switches          #    0.091 K/sec                    ( +-  0.97% )
                      98 cpu-migrations            #    0.000 K/sec                    ( +-  1.66% )
                  57,829 page-faults               #    0.126 K/sec                    ( +-  0.62% )
       1,077,543,336,716 cycles                    #    2.349 GHz                      ( +-  0.81% ) [83.33%]
       1,067,403,802,964 stalled-cycles-frontend   #   99.06% frontend cycles idle     ( +-  0.87% ) [83.33%]
         864,764,616,143 stalled-cycles-backend    #   80.25% backend  cycles idle     ( +-  0.73% ) [66.68%]
          16,129,177,440 instructions              #    0.01  insns per cycle
                                                   #   66.18  stalled cycles per insn  ( +-  7.94% ) [83.35%]
           3,618,938,569 branches                  #    7.888 M/sec                    ( +-  8.46% ) [83.36%]
              33,242,032 branch-misses             #    0.92% of all branches          ( +-  2.02% ) [83.32%]
      
             8.397885779 seconds time elapsed                                          ( +-  0.18% )
      
      HUGETLB, patched:
      -----------------
      
       Performance counter stats for './thp_memscale_hugetlbfs -c 80 -b 512M' (5 runs):
      
           395353.076837 task-clock                #   20.329 CPUs utilized            ( +-  8.16% )
                  55,730 context-switches          #    0.141 K/sec                    ( +-  5.31% )
                     138 cpu-migrations            #    0.000 K/sec                    ( +-  4.24% )
                  21,027 page-faults               #    0.053 K/sec                    ( +-  0.00% )
         930,219,717,244 cycles                    #    2.353 GHz                      ( +-  8.21% ) [83.32%]
         914,295,694,103 stalled-cycles-frontend   #   98.29% frontend cycles idle     ( +-  8.35% ) [83.33%]
         704,137,950,187 stalled-cycles-backend    #   75.70% backend  cycles idle     ( +-  9.16% ) [66.69%]
          30,541,538,385 instructions              #    0.03  insns per cycle
                                                   #   29.94  stalled cycles per insn  ( +-  3.98% ) [83.35%]
           8,415,376,631 branches                  #   21.286 M/sec                    ( +-  3.61% ) [83.36%]
              32,645,478 branch-misses             #    0.39% of all branches          ( +-  3.41% ) [83.32%]
      
            19.447481153 seconds time elapsed                                          ( +-  2.00% )
      
      This patch (of 11):
      
      CONFIG_GENERIC_LOCKBREAK increases sizeof(spinlock_t) to 8 bytes.  It
      leads to increase sizeof(struct page) by 4 bytes on 32-bit system if split
      page table lock is in use, since page->ptl shares space in union with
      longs and pointers.
      
      Let's disable split page table lock on 32-bit systems with
      GENERIC_LOCKBREAK enabled.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Alex Thorlton <athorlton@sgi.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Cc: "Eric W . Biederman" <ebiederm@xmission.com>
      Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Robin Holt <robinmholt@gmail.com>
      Cc: Sedat Dilek <sedat.dilek@gmail.com>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e9bb18c7
    • Kirill A. Shutemov's avatar
      mm: drop actor argument of do_generic_file_read() · b77d88d4
      Kirill A. Shutemov authored
      
      
      There's only one caller of do_generic_file_read() and the only actor is
      file_read_actor().  No reason to have a callback parameter.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Acked-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
      Reviewed-by: default avatarWanpeng Li <liwanp@linux.vnet.ibm.com>
      Cc: Matthew Wilcox <willy@linux.intel.com>
      Cc: Hugh Dickins <hughd@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b77d88d4
    • Andrew Morton's avatar
      drivers/memstick/core/ms_block.c: fix spelling of MSB_RP_RECIVE_STATUS_REG · a0dce7f0
      Andrew Morton authored
      
      
      Cc: Maxim Levitsky <maximlevitsky@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a0dce7f0
  2. 14 Nov, 2013 16 commits
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 4fbf888a
      Linus Torvalds authored
      Pull ext4 changes from Ted Ts'o:
       "Ext4 updates for 3.13.  Mostly bug fixes and cleanups"
      
      * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: add prototypes for macro-generated functions
        ext4: return non-zero st_blocks for inline data
        ext4: use prandom_u32() instead of get_random_bytes()
        ext4: remove unreachable code after ext4_can_extents_be_merged()
        ext4: remove unreachable code in ext4_can_extents_be_merged()
        ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()
        ext4: don't count free clusters from a corrupt block group
        ext4: fix FITRIM in no journal mode
        ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()
        ext4: change ext4_read_inline_dir() to return 0 on success
        ext4: pair trace_ext4_writepages & trace_ext4_writepages_result
        ext4: add ratelimiting to ext4 messages
        ext4: fix performance regression in ext4_writepages
        ext4: fixup kerndoc annotation of mpage_map_and_submit_extent()
        ext4: fix assertion in ext4_add_complete_io()
      4fbf888a
    • Linus Torvalds's avatar
      Merge tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs · 7e1a1e93
      Linus Torvalds authored
      Pull xfs update from Ben Myers:
       "For 3.13-rc1 we have an eclectic assortment of bugfixes, cleanups, and
        refactoring.  Bugfixes that stand out are the fix for the AGF/AGI
        deadlock, incore extent list fixes, verifier fixes for v4 superblocks
        and growfs, and memory leaks.  There are some asserts, warnings, and
        strings that were cleaned up.  There was further rearrangement of code
        to make libxfs and the kernel sync up more easily, differences between
        v2 and v3 directory code were abstracted using an ops vector,
        xfs_inactive was reworked, and the preallocation/hole punching code
        was refactored.
      
         - simplify kmem_zone_zalloc
         - add traces for AGF/AGI read ops
         - add additional AIL traces
         - fix xfs_remove AGF vs AGI deadlock
         - fix the extent count of new incore extent page in the indirection
           array
         - don't fail bad secondary superblocks verification on v4 filesystems
           due to unzeroed bits after v4 fields
         - fix possible NULL dereference in xlog_verify_iclog
         - remove redundant assert in xfs_dir2_leafn_split
         - prevent stack overflows from page cache allocation
         - fix some sparse warnings
         - fix directory block format verifier to check the leaf entry count
         - abstract the differences in dir2/dir3 via an ops vector
         - continue process of reorganization to make libxfs/kernel code
           merges easier
         - refactor the preallocation and hole punching code
         - fix for growfs and verifiers
         - remove unnecessary scary corruption error when probing non-xfs
           filesystems
         - remove extra newlines from strings passed to printk
         - prevent deadlock trying to cover an active log
         - rework xfs_inactive()
         - add the inode directory type support to XFS_IOC_FSGEOM
         - cleanup (remove) usage of is_bad_inode
         - fix miscalculation in xfs_iext_realloc_direct which results in
           oversized direct extent list
         - remove unnecessary count arg to xfs_iomap_write_allocate
         - fix memory leak in xlog_recover_add_to_trans
         - check superblock instead of block magic to determine if dtype field
           is present
         - fix lockdep annotation due to project quotas
         - fix regression in xfs_node_toosmall which can lead to incorrect
           directory btree node collapse
         - make log recovery verify filesystem uuid of recovering blocks
         - fix XFS_IOC_FREE_EOFBLOCKS definition
         - remove invalid assert in xfs_inode_free
         - fix for AIL lock regression"
      
      * tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs: (49 commits)
        xfs: simplify kmem_{zone_}zalloc
        xfs: add tracepoints to AGF/AGI read operations
        xfs: trace AIL manipulations
        xfs: xfs_remove deadlocks due to inverted AGF vs AGI lock ordering
        xfs: fix the extent count when allocating an new indirection array entry
        xfs: be more forgiving of a v4 secondary sb w/ junk in v5 fields
        xfs: fix possible NULL dereference in xlog_verify_iclog
        xfs:xfs_dir2_node.c: pointer use before check for null
        xfs: prevent stack overflows from page cache allocation
        xfs: fix static and extern sparse warnings
        xfs: validity check the directory block leaf entry count
        xfs: make dir2 ftype offset pointers explicit
        xfs: convert directory vector functions to constants
        xfs: convert directory vector functions to constants
        xfs: vectorise encoding/decoding directory headers
        xfs: vectorise DA btree operations
        xfs: vectorise directory leaf operations
        xfs: vectorise directory data operations part 2
        xfs: vectorise directory data operations
        xfs: vectorise remaining shortform dir2 ops
        ...
      7e1a1e93
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · fcd7476f
      Linus Torvalds authored
      Pull perf updates from Ingo Molnar:
       "A number of fixes:
      
         - Fix segfault on perf trace -i perf.data, from Namhyung Kim.
      
         - Fix segfault with --no-mmap-pages, from David Ahern.
      
         - Don't force a refresh during progress update in the TUI, greatly
           reducing startup costs, fix from Patrick Palka.
      
         - Fix sw clock event period test wrt not checking if using >
           max_sample_freq.
      
         - Handle throttle events in 'object code reading' test, fix from
           Adrian Hunter.
      
         - Prevent condition that all sort keys are elided, fix from Namhyung
           Kim.
      
         - Round mmap pages to power 2, from David Ahern.
      
        And a number of late arrival changes:
      
         - Add summary only option to 'perf trace', suppressing the decoding
           of events, from David Ahern
      
         - 'perf trace --summary' formatting simplifications, from Pekka
           Enberg.
      
         - Beautify fifth argument of mmap() as fd, in 'perf trace', from
           Namhyung Kim.
      
         - Add direct access to dynamic arrays in libtraceevent, from Steven
           Rostedt.
      
         - Synthesize non-exec MMAP records when --data used, allowing the
           resolution of data addresses to symbols (global variables, etc), by
           Arnaldo Carvalho de Melo.
      
         - Code cleanups by David Ahern and Adrian Hunter"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
        tools lib traceevent: Add direct access to dynamic arrays
        perf target: Shorten perf_target__ to target__
        perf tests: Handle throttle events in 'object code reading' test
        perf evlist: Refactor mmap_pages parsing
        perf evlist: Round mmap pages to power 2 - v2
        perf record: Fix segfault with --no-mmap-pages
        perf trace: Add summary only option
        perf trace: Simplify '--summary' output
        perf trace: Change syscall summary duration order
        perf tests: Compensate lower sample freq with longer test loop
        perf trace: Fix segfault on perf trace -i perf.data
        perf trace: Separate tp syscall field caching into init routine to be reused
        perf trace: Beautify fifth argument of mmap() as fd
        perf tests: Use lower sample_freq in sw clock event period test
        perf tests: Check return of perf_evlist__open sw clock event period test
        perf record: Move existing write_output into helper function
        perf record: Use correct return type for write()
        perf tools: Prevent condition that all sort keys are elided
        perf machine: Simplify synthesize_threads method
        perf machine: Introduce synthesize_threads method out of open coded equivalent
        ...
      fcd7476f
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d320e203
      Linus Torvalds authored
      Pull two x86 fixes from Ingo Molnar.
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/microcode/amd: Tone down printk(), don't treat a missing firmware file as an error
        x86/dumpstack: Fix printk_address for direct addresses
      d320e203
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · fe8a45df
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar:
       "Four bugfixes and one performance fix"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/fair: Avoid integer overflow
        sched: Optimize task_sched_runtime()
        sched/numa: Cure update_numa_stats() vs. hotplug
        sched/numa: Fix NULL pointer dereference in task_numa_migrate()
        sched: Fix endless sync_sched/rcu() loop inside _cpu_down()
      fe8a45df
    • Linus Torvalds's avatar
      Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5e30025a
      Linus Torvalds authored
      Pull core locking changes from Ingo Molnar:
       "The biggest changes:
      
         - add lockdep support for seqcount/seqlocks structures, this
           unearthed both bugs and required extra annotation.
      
         - move the various kernel locking primitives to the new
           kernel/locking/ directory"
      
      * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
        block: Use u64_stats_init() to initialize seqcounts
        locking/lockdep: Mark __lockdep_count_forward_deps() as static
        lockdep/proc: Fix lock-time avg computation
        locking/doc: Update references to kernel/mutex.c
        ipv6: Fix possible ipv6 seqlock deadlock
        cpuset: Fix potential deadlock w/ set_mems_allowed
        seqcount: Add lockdep functionality to seqcount/seqlock structures
        net: Explicitly initialize u64_stats_sync structures for lockdep
        locking: Move the percpu-rwsem code to kernel/locking/
        locking: Move the lglocks code to kernel/locking/
        locking: Move the rwsem code to kernel/locking/
        locking: Move the rtmutex code to kernel/locking/
        locking: Move the semaphore core to kernel/locking/
        locking: Move the spinlock code to kernel/locking/
        locking: Move the lockdep code to kernel/locking/
        locking: Move the mutex code to kernel/locking/
        hung_task debugging: Add tracepoint to report the hang
        x86/locking/kconfig: Update paravirt spinlock Kconfig description
        lockstat: Report avg wait and hold times
        lockdep, x86/alternatives: Drop ancient lockdep fixup message
        ...
      5e30025a
    • Linus Torvalds's avatar
      Merge branch 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7971e23a
      Linus Torvalds authored
      Pull x86/trace changes from Ingo Molnar:
       "This adds page fault tracepoints which have zero runtime cost in the
        disabled case via IDT trickery (no NOPs in the page fault hotpath)"
      
      * 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86, trace: Change user|kernel_page_fault to page_fault_user|kernel
        x86, trace: Add page fault tracepoints
        x86, trace: Delete __trace_alloc_intr_gate()
        x86, trace: Register exception handler to trace IDT
        x86, trace: Remove __alloc_intr_gate()
      7971e23a
    • Linus Torvalds's avatar
      Merge tag 'fbdev-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux · f0d55cc1
      Linus Torvalds authored
      Pull fbdev changes from Tomi Valkeinen:
       "Nothing particularly stands out in this pull request.  The biggest
        part of the changes are cleanups.
      
        Maybe one fix to mention is the "fb: reorder the lock sequence to fix
        potential dead lock" which hopefully fixes the fb locking issues
        reported by multiple persons.
      
        There are also a few commits that have changes to arch/arm/mach-at91
        and arch/avr32, which have been acked by the maintainers"
      
      * tag 'fbdev-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (143 commits)
        fb: reorder the lock sequence to fix potential dead lock
        fbdev: shmobile-lcdcfb: Convert to clk_prepare/unprepare
        fbdev: shmobile-hdmi: Convert to clk_prepare/unprepare
        omapdss: Add new panel driver for Topolly td028ttec1 LCD.
        video: exynos_mipi_dsi: Unlock the mutex before returning
        video: da8xx-fb: remove unwanted define
        video: Remove unnecessary semicolons
        simplefb: use write-combined remapping
        simplefb: fix unmapping fb during destruction
        OMAPDSS: connector-dvi: fix releasing i2c_adapter
        OMAPDSS: DSI: fix perf measuring ifdefs
        framebuffer: Use fb_<level>
        framebuffer: Add fb_<level> convenience logging macros
        efifb: prevent null-deref when iterating dmi_list
        fbdev: fix error return code in metronomefb_probe()
        video: xilinxfb: Fix for "Use standard variable name convention"
        OMAPDSS: Fix de_level in videomode_to_omap_video_timings()
        video: xilinxfb: Simplify error path
        video: xilinxfb: Use devm_kzalloc instead of kzalloc
        video: xilinxfb: Use standard variable name convention
        ...
      f0d55cc1
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · 549608ea
      Linus Torvalds authored
      Pull thermal management updates from Zhang Rui:
       "This time we only have a few changes as there are no soc thermal
        changes from Eduardo.  The only big change is the introduction of
        TMON, a tool to help visualize, tune, and test the thermal subsystem.
        The rest is mostly cleanups and fixes all over.
      
        Specifics:
      
         - introduce TMON, a tool base on thermal sysfs I/F.  It can be used
           to visualize, tune and test the thermal subsystem.
      
         - fix a zone/cooling device binding problem, when both thermal zone
           bind parameters and .bind() callback are available"
      
      * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        tools/thermal: Introduce tmon, a tool for thermal subsystem
        thermal: Fix binding problem when there is thermal zone params
        thermal: cpu_cooling: fix return value check in cpufreq_cooling_register()
        Thermal: Check for validity before doing kfree
        thermal/intel_powerclamp: Add newer CPU models
        Thermal: Tidy up error handling in powerclamp_init
        thermal: Kconfig: cosmetic fixes
        ACPI/thermal : Remove zone disabled warning
        typo in drivers/thermal/Kconfig: lpatform instead of platform
      549608ea
    • Linus Torvalds's avatar
      Merge tag 'pci-v3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · 2f466d33
      Linus Torvalds authored
      Pull PCI changes from Bjorn Helgaas:
       "Resource management
          - Fix host bridge window coalescing (Alexey Neyman)
          - Pass type, width, and prefetchability for window alignment (Wei Yang)
      
        PCI device hotplug
          - Convert acpiphp, acpiphp_ibm to dynamic debug (Lan Tianyu)
      
        Power management
          - Remove pci_pm_complete() (Liu Chuansheng)
      
        MSI
          - Fail initialization if device is not in PCI_D0 (Yijing Wang)
      
        MPS (Max Payload Size)
          - Use pcie_get_mps() and pcie_set_mps() to simplify code (Yijing Wang)
          - Use pcie_set_readrq() to simplify code (Yijing Wang)
          - Use cached pci_dev->pcie_mpss to simplify code (Yijing Wang)
      
        SR-IOV
          - Enable upstream bridges even for VFs on virtual buses (Bjorn Helgaas)
          - Use pci_is_root_bus() to avoid catching virtual buses (Wei Yang)
      
        Virtualization
          - Add x86 MSI masking ops (Konrad Rzeszutek Wilk)
      
        Freescale i.MX6
          - Support i.MX6 PCIe controller (Sean Cross)
          - Increase link startup timeout (Marek Vasut)
          - Probe PCIe in fs_initcall() (Marek Vasut)
          - Fix imprecise abort handler (Tim Harvey)
          - Remove redundant of_match_ptr (Sachin Kamat)
      
        Renesas R-Car
          - Support Gen2 internal PCIe controller (Valentine Barshak)
      
        Samsung Exynos
          - Add MSI support (Jingoo Han)
          - Turn off power when link fails (Jingoo Han)
          - Add Jingoo Han as maintainer (Jingoo Han)
          - Add clk_disable_unprepare() on error path (Wei Yongjun)
          - Remove redundant of_match_ptr (Sachin Kamat)
      
        Synopsys DesignWare
          - Add irq_create_mapping() (Pratyush Anand)
          - Add header guards (Seungwon Jeon)
      
        Miscellaneous
          - Enable native PCIe services by default on non-ACPI (Andrew Murray)
          - Cleanup _OSC usage and messages (Bjorn Helgaas)
          - Remove pcibios_last_bus boot option on non-x86 (Bjorn Helgaas)
          - Convert bus code to use bus_, drv_, and dev_groups (Greg Kroah-Hartman)
          - Remove unused pci_mem_start (Myron Stowe)
          - Make sysfs functions static (Sachin Kamat)
          - Warn on invalid return from driver probe (Stephen M. Cameron)
          - Remove Intel Haswell D3 delays (Todd E Brandt)
          - Call pci_set_master() in core if driver doesn't do it (Yinghai Lu)
          - Use pci_is_pcie() to simplify code (Yijing Wang)
          - Use PCIe capability accessors to simplify code (Yijing Wang)
          - Use cached pci_dev->pcie_cap to simplify code (Yijing Wang)
          - Removed unused "is_pcie" from struct pci_dev (Yijing Wang)
          - Simplify sysfs CPU affinity implementation (Yijing Wang)"
      
      * tag 'pci-v3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (79 commits)
        PCI: Enable upstream bridges even for VFs on virtual buses
        PCI: Add pci_upstream_bridge()
        PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()
        PCI: Warn on driver probe return value greater than zero
        PCI: Drop warning about drivers that don't use pci_set_master()
        PCI: Workaround missing pci_set_master in pci drivers
        powerpc/pci: Use pci_is_pcie() to simplify code [fix]
        PCI: Update pcie_ports 'auto' behavior for non-ACPI platforms
        PCI: imx6: Probe the PCIe in fs_initcall()
        PCI: Add R-Car Gen2 internal PCI support
        PCI: imx6: Remove redundant of_match_ptr
        PCI: Report pci_pme_active() kmalloc failure
        mn10300/PCI: Remove useless pcibios_last_bus
        frv/PCI: Remove pcibios_last_bus
        PCI: imx6: Increase link startup timeout
        PCI: exynos: Remove redundant of_match_ptr
        PCI: imx6: Fix imprecise abort handler
        PCI: Fail MSI/MSI-X initialization if device is not in PCI_D0
        PCI: imx6: Remove redundant dev_err() in imx6_pcie_probe()
        x86/PCI: Coalesce multiple overlapping host bridge windows
        ...
      2f466d33
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · f9300eaa
      Linus Torvalds authored
      Pull ACPI and power management updates from Rafael J Wysocki:
      
       - New power capping framework and the the Intel Running Average Power
         Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan.
      
       - Addition of the in-kernel switching feature to the arm_big_little
         cpufreq driver from Viresh Kumar and Nicolas Pitre.
      
       - cpufreq support for iMac G5 from Aaro Koskinen.
      
       - Baytrail processors support for intel_pstate from Dirk Brandewie.
      
       - cpufreq support for Midway/ECX-2000 from Mark Langsdorf.
      
       - ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha.
      
       - ACPI power management support for the I2C and SPI bus types from Mika
         Westerberg and Lv Zheng.
      
       - cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat,
         Stratos Karafotis, Xiaoguang Chen, Lan Tianyu.
      
       - cpufreq drivers updates (mostly fixes and cleanups) from Viresh
         Kumar, Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz
         Majewski, Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev.
      
       - intel_pstate updates from Dirk Brandewie and Adrian Huang.
      
       - ACPICA update to version 20130927 includig fixes and cleanups and
         some reduction of divergences between the ACPICA code in the kernel
         and ACPICA upstream in order to improve the automatic ACPICA patch
         generation process.  From Bob Moore, Lv Zheng, Tomasz Nowicki, Naresh
         Bhat, Bjorn Helgaas, David E Box.
      
       - ACPI IPMI driver fixes and cleanups from Lv Zheng.
      
       - ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani, Zhang
         Yanfei, Rafael J Wysocki.
      
       - Conversion of the ACPI AC driver to the platform bus type and
         multiple driver fixes and cleanups related to ACPI from Zhang Rui.
      
       - ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu,
         Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki.
      
       - Fixes and cleanups and new blacklist entries related to the ACPI
         video support from Aaron Lu, Felipe Contreras, Lennart Poettering,
         Kirill Tkhai.
      
       - cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi.
      
       - cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han,
         Bartlomiej Zolnierkiewicz, Prarit Bhargava.
      
       - devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe.
      
       - Operation Performance Points (OPP) core updates from Nishanth Menon.
      
       - Runtime power management core fix from Rafael J Wysocki and update
         from Ulf Hansson.
      
       - Hibernation fixes from Aaron Lu and Rafael J Wysocki.
      
       - Device suspend/resume lockup detection mechanism from Benoit Goby.
      
       - Removal of unused proc directories created for various ACPI drivers
         from Lan Tianyu.
      
       - ACPI LPSS driver fix and new device IDs for the ACPI platform scan
         handler from Heikki Krogerus and Jarkko Nikula.
      
       - New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa.
      
       - Assorted fixes and cleanups related to ACPI from Andy Shevchenko, Al
         Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter,
         Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause,
         Liu Chuansheng.
      
       - Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding,
         Jean-Christophe Plagniol-Villard.
      
      * tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (386 commits)
        cpufreq: conservative: fix requested_freq reduction issue
        ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines
        PM / runtime: Use pm_runtime_put_sync() in __device_release_driver()
        ACPI / event: remove unneeded NULL pointer check
        Revert "ACPI / video: Ignore BIOS initial backlight value for HP 250 G1"
        ACPI / video: Quirk initial backlight level 0
        ACPI / video: Fix initial level validity test
        intel_pstate: skip the driver if ACPI has power mgmt option
        PM / hibernate: Avoid overflow in hibernate_preallocate_memory()
        ACPI / hotplug: Do not execute "insert in progress" _OST
        ACPI / hotplug: Carry out PCI root eject directly
        ACPI / hotplug: Merge device hot-removal routines
        ACPI / hotplug: Make acpi_bus_hot_remove_device() internal
        ACPI / hotplug: Simplify device ejection routines
        ACPI / hotplug: Fix handle_root_bridge_removal()
        ACPI / hotplug: Refuse to hot-remove all objects with disabled hotplug
        ACPI / scan: Start matching drivers after trying scan handlers
        ACPI: Remove acpi_pci_slot_init() headers from internal.h
        ACPI / blacklist: fix name of ThinkPad Edge E530
        PowerCap: Fix build error with option -Werror=format-security
        ...
      
      Conflicts:
      	arch/arm/mach-omap2/opp.c
      	drivers/Kconfig
      	drivers/spi/spi.c
      f9300eaa
    • Linus Torvalds's avatar
      Merge tag 'dm-3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm · 7f2dc5c4
      Linus Torvalds authored
      Pull device mapper changes from Mike Snitzer:
       "A set of device-mapper changes for 3.13.
      
        Improve reliability of buffer allocations for dm messages with a small
        number of arguments, a couple path group initialization fixes for dm
        multipath, a fix for resizing a dm array, various fixes and
        optimizations for dm cache, a fix for device mapper's Kconfig menu
        indentation.
      
        Features added include:
         - dm crypt support for activating legacy CBC TrueCrypt containers
           (useful for forensics of these old TCRYPT containers)
         - reduced dm-cache memory requirements for each block in the cache
         - basic support for shrinking a dm-cache's cache (fast) device
         - most notably, dm-cache support for managing cache coherency when
           deploying dm-cache with sophisticated origin volumes (that support
           hardware snapshots and/or clustering): these changes come in the
           form of a new passthrough operation mode and a cache block
           invalidation interface"
      
      * tag 'dm-3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (32 commits)
        dm cache: resolve small nits and improve Documentation
        dm cache: add cache block invalidation support
        dm cache: add remove_cblock method to policy interface
        dm cache policy mq: reduce memory requirements
        dm cache metadata: check the metadata version when reading the superblock
        dm cache: add passthrough mode
        dm cache: cache shrinking support
        dm cache: promotion optimisation for writes
        dm cache: be much more aggressive about promoting writes to discarded blocks
        dm cache policy mq: implement writeback_work() and mq_{set,clear}_dirty()
        dm cache: optimize commit_if_needed
        dm space map disk: optimise sm_disk_dec_block
        MAINTAINERS: add reference to device-mapper's linux-dm.git tree
        dm: fix Kconfig menu indentation
        dm: allow remove to be deferred
        dm table: print error on preresume failure
        dm crypt: add TCW IV mode for old CBC TCRYPT containers
        dm crypt: properly handle extra key string in initialization
        dm cache: log error message if dm_kcopyd_copy() fails
        dm cache: use cell_defer() boolean argument consistently
        ...
      7f2dc5c4
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd · 82cb6ace
      Linus Torvalds authored
      Pull MTD changes from Brian Norris:
       - Unify some compile-time differences so that we have fewer uses of
         #ifdef CONFIG_OF in atmel_nand
       - Other general cleanups (removing unused functions, options,
         variables, fields; use correct interfaces)
       - Fix BUG() for new odd-sized NAND, which report non-power-of-2
         dimensions via ONFI
       - Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
       - Improve differentiation between SLC and MLC NAND -- this clarifies an
         ABI issue regarding the MTD "type" (in sysfs and in the MEMGETINFO
         ioctl), where the MTD_MLCNANDFLASH type was present but
         inconsistently used
       - Extend GPMI NAND to support multi-chip-select NAND for some platforms
       - Many improvements to the OMAP2/3 NAND driver, including an expanded
         DT binding to bring us closer to mainline support for some OMAP
         systems
       - Fix a deadlock in the error path of the Atmel NAND driver probe
       - Correct the error codes from MTD mmap() to conform to POSIX and the
         Linux Programmer's Manual.  This is an acknowledged change in the MTD
         ABI, but I can't imagine somebody relying on the non-standard -ENOSYS
         error code specifically.  Am I just being unimaginative? :)
       - Fix a few important GPMI NAND bugs (one regression from 3.12 and one
         long-standing race condition)
       - More? Read the log!
      
      * tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd: (98 commits)
        mtd: gpmi: fix the NULL pointer
        mtd: gpmi: fix kernel BUG due to racing DMA operations
        mtd: mtdchar: return expected errors on mmap() call
        mtd: gpmi: only scan two chips for imx6
        mtd: gpmi: Use devm_kzalloc()
        mtd: atmel_nand: fix bug driver will in a dead lock if no nand detected
        mtd: nand: use a local variable to simplify the nand_scan_tail
        mtd: nand: remove deprecated IRQF_DISABLED
        mtd: dataflash: Say if we find a device we don't support
        mtd: nand: omap: fix error return code in omap_nand_probe()
        mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES
        mtd: m25p80: fixup device removal failure path
        mtd: mxc_nand: Include linux/of.h header
        mtd: remove duplicated include from mtdcore.c
        mtd: m25p80: add support for Macronix mx25l3255e
        mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig
        mtd: nand: omap: updated devm_xx for all resource allocation and free calls
        mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c
        mtd: nand: omap: clean-up ecc layout for BCH ecc schemes
        mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe
        ...
      82cb6ace
    • Linus Torvalds's avatar
      Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 0d522ee7
      Linus Torvalds authored
      Pull first round of SCSI updates from James Bottomley:
       "This patch set is driver updates for qla4xxx, scsi_debug, pm80xx,
        fcoe/libfc, eas2r, lpfc, be2iscsi and megaraid_sas plus some assorted
        bug fixes and cleanups"
      
      * tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (106 commits)
        [SCSI] scsi_error: Escalate to LUN reset if abort fails
        [SCSI] Add 'eh_deadline' to limit SCSI EH runtime
        [SCSI] remove check for 'resetting'
        [SCSI] dc395: Move 'last_reset' into internal host structure
        [SCSI] tmscsim: Move 'last_reset' into host structure
        [SCSI] advansys: Remove 'last_reset' references
        [SCSI] dpt_i2o: return SCSI_MLQUEUE_HOST_BUSY when in reset
        [SCSI] dpt_i2o: Remove DPTI_STATE_IOCTL
        [SCSI] megaraid_sas: Fix synchronization problem between sysPD IO path and AEN path
        [SCSI] lpfc: Fix typo on NULL assignment
        [SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning
        [SCSI] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention
        [SCSI] esas2r: Cleanup snprinf formatting of firmware version
        [SCSI] esas2r: Remove superfluous mask of pcie_cap_reg
        [SCSI] esas2r: Fixes for big-endian platforms
        [SCSI] esas2r: Directly call kernel functions for atomic bit operations
        [SCSI] lpfc 8.3.43: Update lpfc version to driver version 8.3.43
        [SCSI] lpfc 8.3.43: Fixed not processing task management IOCB response status
        [SCSI] lpfc 8.3.43: Fixed spinlock hang.
        [SCSI] lpfc 8.3.43: Fixed invalid Total_Data_Placed value received for els and ct command responses
        ...
      0d522ee7
    • Linus Torvalds's avatar
      Merge branch 'for-3.13/drivers' of git://git.kernel.dk/linux-block · 5eea9be8
      Linus Torvalds authored
      Pull block driver updates from Jens Axboe:
       "This is the block driver pull request for 3.13.  As with the core pull
        request just sent out, this was rebased on top of the core branch
        again after the immutable series was pulled.  This also means that
        bcache gets to sit the initial pull over.  I will send a second driver
        pull request in the merge window to get those fixes in, once they have
        been rebased and tested on top of the non-immutable stack.
      
        This pull request contains:
      
         - Add support for the sTec Kronos pci-e flash card from sTec.  Also
           has various cleanups for this driver, from myself, Bart, Mike
           Snizter, and Wei Yongjun.
      
         - Add surprise removal support for the micron mtip32xx driver from
           Micron.
      
         - Floppy documentation fix from Ben Harris.
      
         - debugfs bug fix for pktcdvd from Dan Carpenter.
      
         - Fix for the mtip32xx driver stack usage in the debugfs path,
           dynamically allocating those buffers instead.  From David Milburn.
      
         - Disable cpqarray in Kconfig.  The plan is to remove it on request
           of HP, but lets disable it for a few revisions just to see if
           anyone yells.
      
         - drbd fixes from Lars Ellenberg and Philipp Reisner.
      
         - Elevator switch fix for the s390 block driver from Heiko Carstens.
      
         - loop crash fix on IO to unassigned device from Mikulas Patocka.
      
         - A series of bug fixes for the IBM rsxx pci-e flash driver from
           Philip J Kelleher.
      
         - cciss probe fix from Stephen Cameron.
      
         - Xen block front/back fixes from Roger Pau Monne and Vegard Nossum"
      
      * 'for-3.13/drivers' of git://git.kernel.dk/linux-block: (41 commits)
        floppy: Correct documentation of driver options when used as a module.
        pktcdvd: debugfs functions return NULL on error
        xen-blkfront: restore the non-persistent data path
        skd: fix formatting in skd_s1120.h
        skd: reorder construct/destruct code
        skd: cleanup skd_do_inq_page_da()
        skd: remove SKD_OMIT_FROM_SRC_DIST ifdefs
        skd: remove redundant skdev->pdev assignment from skd_pci_probe()
        skd: use <asm/unaligned.h>
        skd: remove SCSI subsystem specific includes
        skd: register block device only if some devices are present
        skd: fix error messages in skd_init()
        skd: fix error paths in skd_init()
        skd: fix unregister_blkdev() placement
        skd: more removal of bio-based code
        skd: cleanup the skd_*() function block wrapping
        skd: rip out bio path
        skd: fix error return code in skd_pci_probe()
        s390/dasd: hold request queue sysfs lock when calling elevator_init()
        cciss: return 0 from driver probe function on success, not 1
        ...
      5eea9be8
    • Linus Torvalds's avatar
      Merge branch 'for-3.13/core' of git://git.kernel.dk/linux-block · 0910c0bd
      Linus Torvalds authored
      Pull block IO core updates from Jens Axboe:
       "This is the pull request for the core changes in the block layer for
        3.13.  It contains:
      
         - The new blk-mq request interface.
      
           This is a new and more scalable queueing model that marries the
           best part of the request based interface we currently have (which
           is fully featured, but scales poorly) and the bio based "interface"
           which the new drivers for high IOPS devices end up using because
           it's much faster than the request based one.
      
           The bio interface has no block layer support, since it taps into
           the stack much earlier.  This means that drivers end up having to
           implement a lot of functionality on their own, like tagging,
           timeout handling, requeue, etc.  The blk-mq interface provides all
           these.  Some drivers even provide a switch to select bio or rq and
           has code to handle both, since things like merging only works in
           the rq model and hence is faster for some workloads.  This is a
           huge mess.  Conversion of these drivers nets us a substantial code
           reduction.  Initial results on converting SCSI to this model even
           shows an 8x improvement on single queue devices.  So while the
           model was intended to work on the newer multiqueue devices, it has
           substantial improvements for "classic" hardware as well.  This code
           has gone through extensive testing and development, it's now ready
           to go.  A pull request is coming to convert virtio-blk to this
           model will be will be coming as well, with more drivers scheduled
           for 3.14 conversion.
      
         - Two blktrace fixes from Jan and Chen Gang.
      
         - A plug merge fix from Alireza Haghdoost.
      
         - Conversion of __get_cpu_var() from Christoph Lameter.
      
         - Fix for sector_div() with 64-bit divider from Geert Uytterhoeven.
      
         - A fix for a race between request completion and the timeout
           handling from Jeff Moyer.  This is what caused the merge conflict
           with blk-mq/core, in case you are looking at that.
      
         - A dm stacking fix from Mike Snitzer.
      
         - A code consolidation fix and duplicated code removal from Kent
           Overstreet.
      
         - A handful of block bug fixes from Mikulas Patocka, fixing a loop
           crash and memory corruption on blk cg.
      
         - Elevator switch bug fix from Tomoki Sekiyama.
      
        A heads-up that I had to rebase this branch.  Initially the immutable
        bio_vecs had been queued up for inclusion, but a week later, it became
        clear that it wasn't fully cooked yet.  So the decision was made to
        pull this out and postpone it until 3.14.  It was a straight forward
        rebase, just pruning out the immutable series and the later fixes of
        problems with it.  The rest of the patches applied directly and no
        further changes were made"
      
      * 'for-3.13/core' of git://git.kernel.dk/linux-block: (31 commits)
        block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
        block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
        block: Do not call sector_div() with a 64-bit divisor
        kernel: trace: blktrace: remove redundent memcpy() in compat_blk_trace_setup()
        block: Consolidate duplicated bio_trim() implementations
        block: Use rw_copy_check_uvector()
        block: Enable sysfs nomerge control for I/O requests in the plug list
        block: properly stack underlying max_segment_size to DM device
        elevator: acquire q->sysfs_lock in elevator_change()
        elevator: Fix a race in elevator switching and md device initialization
        block: Replace __get_cpu_var uses
        bdi: test bdi_init failure
        block: fix a probe argument to blk_register_region
        loop: fix crash if blk_alloc_queue fails
        blk-core: Fix memory corruption if blkcg_init_queue fails
        block: fix race between request completion and timeout handling
        blktrace: Send BLK_TN_PROCESS events to all running traces
        blk-mq: don't disallow request merges for req->special being set
        blk-mq: mq plug list breakage
        blk-mq: fix for flush deadlock
        ...
      0910c0bd
  3. 13 Nov, 2013 14 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 2821fe6b
      Linus Torvalds authored
      Pull VFS fixes from Al Viro:
       "Several fixes, mostly for regressions in the last pile.  Howeover,
        prepend_path() forgetting to reininitalize dentry/vfsmount is in 3.12
        as well and qib_fs had been leaking all along..."
      
      The unpaired RCU lock issue was also independently reported by Dave
      Jones with his fuzzer tool..
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        qib_fs: fix (some) dcache abuses
        prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
        fix unpaired rcu lock in prepend_path()
        locks: missing unlock on error in generic_add_lease()
        aio: checking for NULL instead of IS_ERR
      2821fe6b
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm · f47671e2
      Linus Torvalds authored
      Pull ARM updates from Russell King:
       "Included in this series are:
      
         1. BE8 (modern big endian) changes for ARM from Ben Dooks
         2. big.Little support from Nicolas Pitre and Dave Martin
         3. support for LPAE systems with all system memory above 4GB
         4. Perf updates from Will Deacon
         5. Additional prefetching and other performance improvements from Will.
         6. Neon-optimised AES implementation fro Ard.
         7. A number of smaller fixes scattered around the place.
      
        There is a rather horrid merge conflict in tools/perf - I was never
        notified of the conflict because it originally occurred between Will's
        tree and other stuff.  Consequently I have a resolution which Will
        forwarded me, which I'll forward on immediately after sending this
        mail.
      
        The other notable thing is I'm expecting some build breakage in the
        crypto stuff on ARM only with Ard's AES patches.  These were merged
        into a stable git branch which others had already pulled, so there's
        little I can do about this.  The problem is caused because these
        patches have a dependency on some code in the crypto git tree - I
        tried requesting a branch I can pull to resolve these, and all I got
        each time from the crypto people was "we'll revert our patches then"
        which would only make things worse since I still don't have the
        dependent patches.  I've no idea what's going on there or how to
        resolve that, and since I can't split these patches from the rest of
        this pull request, I'm rather stuck with pushing this as-is or
        reverting Ard's patches.
      
        Since it should "come out in the wash" I've left them in - the only
        build problems they seem to cause at the moment are with randconfigs,
        and since it's a new feature anyway.  However, if by -rc1 the
        dependencies aren't in, I think it'd be best to revert Ard's patches"
      
      I resolved the perf conflict roughly as per the patch sent by Russell,
      but there may be some differences.  Any errors are likely mine.  Let's
      see how the crypto issues work out..
      
      * 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (110 commits)
        ARM: 7868/1: arm/arm64: remove atomic_clear_mask() in "include/asm/atomic.h"
        ARM: 7867/1: include: asm: use 'int' instead of 'unsigned long' for 'oldval' in atomic_cmpxchg().
        ARM: 7866/1: include: asm: use 'long long' instead of 'u64' within atomic.h
        ARM: 7871/1: amba: Extend number of IRQS
        ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise()
        ARM: 7872/1: Support arch_irq_work_raise() via self IPIs
        ARM: 7880/1: Clear the IT state independent of the Thumb-2 mode
        ARM: 7878/1: nommu: Implement dummy early_paging_init()
        ARM: 7876/1: clear Thumb-2 IT state on exception handling
        ARM: 7874/2: bL_switcher: Remove cpu_hotplug_driver_{lock,unlock}()
        ARM: footbridge: fix build warnings for netwinder
        ARM: 7873/1: vfp: clear vfp_current_hw_state for dying cpu
        ARM: fix misplaced arch_virt_to_idmap()
        ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdown
        ARM: 7847/1: mcpm: Factor out logical-to-physical CPU translation
        ARM: 7869/1: remove unused XSCALE_PMU Kconfig param
        ARM: 7864/1: Handle 64-bit memory in case of 32-bit phys_addr_t
        ARM: 7863/1: Let arm_add_memory() always use 64-bit arguments
        ARM: 7862/1: pcpu: replace __get_cpu_var_uses
        ARM: 7861/1: cacheflush: consolidate single-CPU ARMv7 cache disabling code
        ...
      f47671e2
    • Linus Torvalds's avatar
      Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm · 8ceafbfa
      Linus Torvalds authored
      Pull DMA mask updates from Russell King:
       "This series cleans up the handling of DMA masks in a lot of drivers,
        fixing some bugs as we go.
      
        Some of the more serious errors include:
         - drivers which only set their coherent DMA mask if the attempt to
           set the streaming mask fails.
         - drivers which test for a NULL dma mask pointer, and then set the
           dma mask pointer to a location in their module .data section -
           which will cause problems if the module is reloaded.
      
        To counter these, I have introduced two helper functions:
         - dma_set_mask_and_coherent() takes care of setting both the
           streaming and coherent masks at the same time, with the correct
           error handling as specified by the API.
         - dma_coerce_mask_and_coherent() which resolves the problem of
           drivers forcefully setting DMA masks.  This is more a marker for
           future work to further clean these locations up - the code which
           creates the devices really should be initialising these, but to fix
           that in one go along with this change could potentially be very
           disruptive.
      
        The last thing this series does is prise away some of Linux's addition
        to "DMA addresses are physical addresses and RAM always starts at
        zero".  We have ARM LPAE systems where all system memory is above 4GB
        physical, hence having DMA masks interpreted by (eg) the block layers
        as describing physical addresses in the range 0..DMAMASK fails on
        these platforms.  Santosh Shilimkar addresses this in this series; the
        patches were copied to the appropriate people multiple times but were
        ignored.
      
        Fixing this also gets rid of some ARM weirdness in the setup of the
        max*pfn variables, and brings ARM into line with every other Linux
        architecture as far as those go"
      
      * 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm: (52 commits)
        ARM: 7805/1: mm: change max*pfn to include the physical offset of memory
        ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations
        ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
        ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function
        ARM: 7794/1: block: Rename parameter dma_mask to max_addr for blk_queue_bounce_limit()
        ARM: DMA-API: better handing of DMA masks for coherent allocations
        ARM: 7857/1: dma: imx-sdma: setup dma mask
        DMA-API: firmware/google/gsmi.c: avoid direct access to DMA masks
        DMA-API: dcdbas: update DMA mask handing
        DMA-API: dma: edma.c: no need to explicitly initialize DMA masks
        DMA-API: usb: musb: use platform_device_register_full() to avoid directly messing with dma masks
        DMA-API: crypto: remove last references to 'static struct device *dev'
        DMA-API: crypto: fix ixp4xx crypto platform device support
        DMA-API: others: use dma_set_coherent_mask()
        DMA-API: staging: use dma_set_coherent_mask()
        DMA-API: usb: use new dma_coerce_mask_and_coherent()
        DMA-API: usb: use dma_set_coherent_mask()
        DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent()
        DMA-API: net: octeon: use dma_coerce_mask_and_coherent()
        DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent()
        ...
      8ceafbfa
    • Al Viro's avatar
      qib_fs: fix (some) dcache abuses · 441a9d0e
      Al Viro authored
      
      
      * lookup_one_len() really wants i_mutex held on directory.
      * leaks galore - just mount ipathfs, then
      cd /sys/bus/pci/drivers/qib_ib; echo *:*:*.* >unbind
      on a box with that card present and try to umount ipathfs...
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      441a9d0e
    • Peter Zijlstra's avatar
      block: Use u64_stats_init() to initialize seqcounts · 90d3839b
      Peter Zijlstra authored
      
      
      Now that seqcounts are lockdep enabled objects, we need to explicitly
      initialize runtime allocated seqcounts so that lockdep can track them.
      
      Without this patch, Fengguang was seeing:
      
        [    4.127282] INFO: trying to register non-static key.
        [    4.128027] the code is fine but needs lockdep annotation.
        [    4.128027] turning off the locking correctness validator.
        [    4.128027] CPU: 0 PID: 96 Comm: kworker/u4:1 Not tainted 3.12.0-next-20131108-10601-gbad570d #2
        [    4.128027] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
        [    ...     ]
        [    4.128027] Call Trace:
        [    4.128027]  [<7908e744>] ? console_unlock+0x353/0x380
        [    4.128027]  [<79dc7cf2>] dump_stack+0x48/0x60
        [    4.128027]  [<7908953e>] __lock_acquire.isra.26+0x7e3/0xceb
        [    4.128027]  [<7908a1c5>] lock_acquire+0x71/0x9a
        [    4.128027]  [<794079aa>] ? blk_throtl_bio+0x1c3/0x485
        [    4.128027]  [<7940658b>] throtl_update_dispatch_stats+0x7c/0x153
        [    4.128027]  [<794079aa>] ? blk_throtl_bio+0x1c3/0x485
        [    4.128027]  [<794079aa>] blk_throtl_bio+0x1c3/0x485
        ...
      
      Use u64_stats_init() for all affected data structures, which initializes
      the seqcount.
      Reported-and-Tested-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Cc: Jens Axboe <axboe@kernel.dk>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      [ Folded in another fix from the mailing list as well as a fix to that fix. Tweaked commit message. ]
      Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/1384314134-6895-1-git-send-email-john.stultz@linaro.org
      
      
      [ So I actually think that the two SOBs from PeterZ are the right depiction of the patch route. ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      90d3839b
    • Fengguang Wu's avatar
      locking/lockdep: Mark __lockdep_count_forward_deps() as static · 5216d530
      Fengguang Wu authored
      
      
      There are new Sparse warnings:
      
        >> kernel/locking/lockdep.c:1235:15: sparse: symbol '__lockdep_count_forward_deps' was not declared. Should it be static?
        >> kernel/locking/lockdep.c:1261:15: sparse: symbol '__lockdep_count_backward_deps' was not declared. Should it be static?
      
      Please consider folding the attached diff :-)
      Signed-off-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/527d1787.ThzXGoUspZWehFDl\%fengguang.wu@intel.com
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      5216d530
    • Al Viro's avatar
      prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts · ede4cebc
      Al Viro authored
      
      
      ... and equivalent is needed in 3.12; it's broken there as well
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      ede4cebc
    • Li Zhong's avatar
      fix unpaired rcu lock in prepend_path() · 4ec6c2ae
      Li Zhong authored
      
      Signed-off-by: default avatarLi Zhong <zhong@linux.vnet.ibm.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      4ec6c2ae
    • Michal Nazarewicz's avatar
      sched/fair: Avoid integer overflow · 85b088e9
      Michal Nazarewicz authored
      
      
      sa->runnable_avg_sum is of type u32 but after shifting it by NICE_0_SHIFT
      bits it is promoted to u64.  This of course makes no sense, since the
      result will never be more then 32-bit long.  Casting sa->runnable_avg_sum
      to u64 before it is shifted, fixes this problem.
      Reviewed-by: default avatarBen Segall <bsegall@google.com>
      Signed-off-by: default avatarMichal Nazarewicz <mina86@mina86.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/1384112521-25177-1-git-send-email-mpn@google.com
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      85b088e9
    • Peter Zijlstra's avatar
      sched: Optimize task_sched_runtime() · 911b2898
      Peter Zijlstra authored
      
      
      Large multi-threaded apps like to hit this using do_sys_times() and
      then queue up on the rq->lock.
      
      Avoid when possible.
      
      Larry reported ~20% performance increase his test case.
      Reported-by: default avatarLarry Woodman <lwoodman@redhat.com>
      Suggested-by: default avatarPaul Turner <pjt@google.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Link: http://lkml.kernel.org/r/20131111172925.GG26898@twins.programming.kicks-ass.net
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      911b2898
    • Peter Zijlstra's avatar
      sched/numa: Cure update_numa_stats() vs. hotplug · 5eca82a9
      Peter Zijlstra authored
      
      
      Because we're completely unserialized against hotplug its well
      possible to try and generate numa stats for an offlined node.
      
      Bail out early (and avoid a /0) in this case. The resulting stats are
      all 0 which should result in an undesirable balance target -- not to
      mention that actually trying to migrate to an offline CPU will fail.
      Reported-by: default avatarPrarit Bhargava <prarit@redhat.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Link: http://lkml.kernel.org/n/tip-orja0qylcvyhxfsuebcyL5sI@git.kernel.org
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      5eca82a9
    • Rik van Riel's avatar
      sched/numa: Fix NULL pointer dereference in task_numa_migrate() · 46a73e8a
      Rik van Riel authored
      
      
      The cpusets code can split up the scheduler's domain tree into
      smaller domains.  Some of those smaller domains may not cross
      NUMA nodes at all, leading to a NULL pointer dereference on the
      per-cpu sd_numa pointer.
      
      Tasks cannot be migrated out of their domain, so the patch
      also sets p->numa_preferred_nid to whereever they are, to
      prevent the migration from being retried over and over again.
      Reported-by: default avatarPrarit Bhargava <prarit@redhat.com>
      Signed-off-by: default avatarRik van Riel <riel@redhat.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Cc: Mel Gorman <mgorman@suse.de>
      Link: http://lkml.kernel.org/n/tip-oosqomw0Jput0Jkvoowhrqtu@git.kernel.org
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      46a73e8a
    • Michael wang's avatar
      sched: Fix endless sync_sched/rcu() loop inside _cpu_down() · 106dd5af
      Michael wang authored
      Commit 6acce3ef
      
      :
      
      	sched: Remove get_online_cpus() usage
      
      tries to do sync_sched/rcu() inside _cpu_down() but triggers:
      
      	INFO: task swapper/0:1 blocked for more than 120 seconds.
      	...
      	[<ffffffff811263dc>] synchronize_rcu+0x2c/0x30
      	[<ffffffff81d1bd82>] _cpu_down+0x2b2/0x340
      	...
      
      It was caused by that in the rcu boost case we rely on smpboot thread to
      finish the rcu callback, which has already been parked before sync in here
      and leads to the endless sync_sched/rcu().
      
      This patch exchanges the sequence of smpboot_park_threads() and
      sync_sched/rcu() to fix the bug.
      Reported-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Tested-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Signed-off-by: default avatarMichael Wang <wangyun@linux.vnet.ibm.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/5282EDC0.6060003@linux.vnet.ibm.com
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      106dd5af
    • Dan Carpenter's avatar
      locks: missing unlock on error in generic_add_lease() · 4fdb793f
      Dan Carpenter authored
      We should unlock here before returning.
      
      Fixes: df4e8d2c
      
       ('locks: implement delegations')
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      4fdb793f