diff options
| -rw-r--r-- | block/as-iosched.c | 5 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 5 |
2 files changed, 6 insertions, 4 deletions
diff --git a/block/as-iosched.c b/block/as-iosched.c index 296708ceceb2..e25a5d79ab27 100644 --- a/block/as-iosched.c +++ b/block/as-iosched.c @@ -1844,9 +1844,10 @@ static void __exit as_exit(void) DECLARE_COMPLETION(all_gone); elv_unregister(&iosched_as); ioc_gone = &all_gone; - barrier(); + /* ioc_gone's update must be visible before reading ioc_count */ + smp_wmb(); if (atomic_read(&ioc_count)) - complete(ioc_gone); + wait_for_completion(ioc_gone); synchronize_rcu(); kmem_cache_destroy(arq_pool); } diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 67d446de0227..01820b1094e9 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -2439,9 +2439,10 @@ static void __exit cfq_exit(void) DECLARE_COMPLETION(all_gone); elv_unregister(&iosched_cfq); ioc_gone = &all_gone; - barrier(); + /* ioc_gone's update must be visible before reading ioc_count */ + smp_wmb(); if (atomic_read(&ioc_count)) - complete(ioc_gone); + wait_for_completion(ioc_gone); synchronize_rcu(); cfq_slab_kill(); } |