From 6ca342d020e8b8315d430d3a7d7c65daadfb4d8b Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 17 Aug 2018 15:46:08 -0700
Subject: [PATCH] mm: workingset: make shadow_lru_isolate() use locking suffix
shadow_lru_isolate() disables interrupts and acquires a lock. It could
use spin_lock_irq() instead. It also uses local_irq_enable() while it
could use spin_unlock_irq()/xa_unlock_irq().
Use proper suffix for lock/unlock in order to enable/disable interrupts
during release/acquire of a lock.
Link: http://lkml.kernel.org/r/20180622151221.28167-3-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/workingset.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/mm/workingset.c b/mm/workingset.c
index ed81511808990..529480c21f931 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -431,7 +431,7 @@ static enum lru_status shadow_lru_isolate(struct list_head *item,
/* Coming from the list, invert the lock order */
if (!xa_trylock(&mapping->i_pages)) {
- spin_unlock(lru_lock);
+ spin_unlock_irq(lru_lock);
ret = LRU_RETRY;
goto out;
}
@@ -469,13 +469,11 @@ static enum lru_status shadow_lru_isolate(struct list_head *item,
workingset_lookup_update(mapping));
out_invalid:
- xa_unlock(&mapping->i_pages);
+ xa_unlock_irq(&mapping->i_pages);
ret = LRU_REMOVED_RETRY;
out:
- local_irq_enable();
cond_resched();
- local_irq_disable();
- spin_lock(lru_lock);
+ spin_lock_irq(lru_lock);
return ret;
}
--
GitLab