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| author | David Sterba | 2015-10-10 18:35:10 +0200 |
|---|---|---|
| committer | David Sterba | 2015-10-10 18:35:10 +0200 |
| commit | 33a9eca7e4a4c2c17aebbb11f0e506a48ebc30c9 (patch) | |
| tree | d7651da94ff1ef4ad27ab0ac932665fd8ef7b41c /fs/btrfs/tree-log.c | |
| parent | btrfs: add barrier for waitqueue_active in clear_btree_io_tree (diff) | |
| download | kernel-qcow2-linux-33a9eca7e4a4c2c17aebbb11f0e506a48ebc30c9.tar.gz kernel-qcow2-linux-33a9eca7e4a4c2c17aebbb11f0e506a48ebc30c9.tar.xz kernel-qcow2-linux-33a9eca7e4a4c2c17aebbb11f0e506a48ebc30c9.zip | |
btrfs: comment waitqueue_active implied by locks
Suggested-by: Chris Mason <clm@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
| -rw-r--r-- | fs/btrfs/tree-log.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 1bbaace73383..d0deb4643502 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2950,6 +2950,9 @@ out_wake_log_root: atomic_set(&log_root_tree->log_commit[index2], 0); mutex_unlock(&log_root_tree->log_mutex); + /* + * The barrier before waitqueue_active is implied by mutex_unlock + */ if (waitqueue_active(&log_root_tree->log_commit_wait[index2])) wake_up(&log_root_tree->log_commit_wait[index2]); out: @@ -2961,6 +2964,9 @@ out: atomic_set(&root->log_commit[index1], 0); mutex_unlock(&root->log_mutex); + /* + * The barrier before waitqueue_active is implied by mutex_unlock + */ if (waitqueue_active(&root->log_commit_wait[index1])) wake_up(&root->log_commit_wait[index1]); return ret; |