[GFS2] Fix a bug: scheduling under a spinlock

At some stage, a mutex was added to gfs2_glock_put() without
checking all its call sites. Two of them were called from
under a spinlock causing random delays at various points and
crashes.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 74cf28e77b47..da49973a90d1 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -214,6 +214,8 @@ void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
 	struct buffer_head *bh;
 	int retry;
 
+	BUG_ON(!spin_is_locked(&sdp->sd_log_lock));
+
 	do {
 		retry = 0;