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Signed-off-by: Kirill Tkhai --- mm/vmscan.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 9dda903a1406..2dc274a385b9 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -167,7 +167,7 @@ int vm_swappiness = 60; unsigned long vm_total_pages; static LIST_HEAD(shrinker_list); -static DECLARE_RWSEM(shrinker_rwsem); +static DEFINE_MUTEX(shrinker_mutex); DEFINE_STATIC_SRCU(srcu); #ifdef CONFIG_MEMCG_KMEM @@ -192,7 +192,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) { int id, ret = -ENOMEM; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); id = idr_alloc(&shrinker_idr, SHRINKER_REGISTERING, 0, 0, GFP_KERNEL); if (id < 0) goto unlock; @@ -208,7 +208,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) shrinker->id = id; ret = 0; unlock: - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; } @@ -218,9 +218,9 @@ static void unregister_memcg_shrinker(struct shrinker *shrinker) BUG_ON(id < 0); - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); idr_remove(&shrinker_idr, id); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); } #else /* CONFIG_MEMCG_KMEM */ static int prealloc_memcg_shrinker(struct shrinker *shrinker) @@ -405,10 +405,10 @@ void free_prealloced_shrinker(struct shrinker *shrinker) void register_shrinker_prepared(struct shrinker *shrinker) { - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); list_add_tail_rcu(&shrinker->list, &shrinker_list); idr_replace(&shrinker_idr, shrinker, shrinker->id); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); } int register_shrinker(struct shrinker *shrinker) @@ -431,9 +431,9 @@ void unregister_shrinker(struct shrinker *shrinker) return; if (shrinker->flags & SHRINKER_MEMCG_AWARE) unregister_memcg_shrinker(shrinker); - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); list_del_rcu(&shrinker->list); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); synchronize_srcu(&srcu);