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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-08-17 15:46:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-17 16:20:29 -0700
commit6ca342d020e8b8315d430d3a7d7c65daadfb4d8b (patch)
treec51936e10cd1aa01bbcfa8eb3995146e7cb43bed
parentae1e16da14b2bca94272c9f23c930be48994b2bb (diff)
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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>
-rw-r--r--mm/workingset.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/mm/workingset.c b/mm/workingset.c
index ed8151180899..529480c21f93 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;
}