From: Josef Bacik <josef@redhat.com>
Date: Mon, 18 Jun 2012 13:23:18 +0000 (-0600)
Subject: Btrfs: add a missing spin_lock
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e18fca734278784bd6591de63ca148cc27344ca9;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Btrfs: add a missing spin_lock

When fixing up the locking in the delayed ref destruction work I accidently
broke the locking myself ;(.  Add back a spin_lock that should be there and
we are now all set.  Thanks,
Btrfs: add a missing spin_lock

When fixing up the locking in the delayed ref destruction work I accidently
broke the locking myself ;(.  Add back a spin_lock that should be there and
we are now all set.  Thanks,

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index e22c5bbf0223..7d7bc8eace86 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3426,6 +3426,7 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 				mutex_unlock(&head->mutex);
 				btrfs_put_delayed_ref(ref);
 
+				spin_lock(&delayed_refs->lock);
 				continue;
 			}