• Kirtika Ruchandani's avatar
    drivers/base/memory.c: Remove unused 'first_page' variable · e22defeb
    Kirtika Ruchandani authored
    Commit 71fbd556 ("memory-hotplug: remove redundant call of page_to_pfn")
    introduced an optimization that rendered 'struct page* first_page'
    useless in memory_block_action(). Compiling with W=1 gives the
    following warning, fix it.
    drivers/base/memory.c: In function ‘memory_block_action’:
    drivers/base/memory.c:229:15: warning: variable ‘first_page’ set but not used [-Wunused-but-set-variable]
      struct page *first_page;
    This is a harmeless warning and is only being fixed to reduce the
    noise with W=1 in the kernel. The call to pfn_to_page() has no side
    effects and is safe to remove.
    Fixes: 71fbd556
     ("memory-hotplug: remove redundant call of page_to_pfn")
    Cc: Zhang Zhen <zhenzhang.zhang@huawei.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: default avatarKirtika Ruchandani <kirtika@chromium.org>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
memory.c 19.6 KB