[PATCH] jbd: add lock annotation to jbd_sync_bh

jbd_sync_bh releases journal->j_list_lock.  Add a lock annotation to this
function so that sparse can check callers for lock pairing, and so that
sparse will not complain about this function since it intentionally uses
the lock in this manner.

Signed-off-by: Josh Triplett <josh@freedesktop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c
index 47678a26c13b271d81cb50c56fa94a3fad5ff0cd..d0685596e5a66df8bfd7bbf10f4e3d8835942cf4 100644 (file)
--- a/fs/jbd/checkpoint.c
+++ b/fs/jbd/checkpoint.c
@@ -145,6 +145,7 @@ void __log_wait_for_space(journal_t *journal)
  * jbd_unlock_bh_state().
  */
 static void jbd_sync_bh(journal_t *journal, struct buffer_head *bh)
+       __releases(journal->j_list_lock)
 {
        get_bh(bh);
        spin_unlock(&journal->j_list_lock);