From 6ca342d020e8b8315d430d3a7d7c65daadfb4d8b Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior 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 Reviewed-by: Andrew Morton Cc: Vladimir Davydov Cc: Kirill Tkhai Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/workingset.c | 8 +++----- 1 file 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; }