btrfs: replace waitqueue_actvie with cond_wake_up

Use the wrappers and reduce the amount of low-level details about the
waitqueue management.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 4 insertions, 6 deletions

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 12f703e127dd..89946285203d 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -1009,9 +1009,9 @@ void btrfs_dev_replace_clear_lock_blocking(
         ASSERT(atomic_read(&dev_replace->read_locks) > 0);
         ASSERT(atomic_read(&dev_replace->blocking_readers) > 0);
         read_lock(&dev_replace->lock);
-        if (atomic_dec_and_test(&dev_replace->blocking_readers) &&
-            waitqueue_active(&dev_replace->read_lock_wq))
-                wake_up(&dev_replace->read_lock_wq);
+        /* Barrier implied by atomic_dec_and_test */
+        if (atomic_dec_and_test(&dev_replace->blocking_readers))
+                cond_wake_up_nomb(&dev_replace->read_lock_wq);
 }
 
 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info)
@@ -1022,9 +1022,7 @@ void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info)
 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount)
 {
         percpu_counter_sub(&fs_info->bio_counter, amount);
-
-        if (waitqueue_active(&fs_info->replace_wait))
-                wake_up(&fs_info->replace_wait);
+        cond_wake_up_nomb(&fs_info->replace_wait);
 }
 
 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info)