author: Jens Axboe <jens.axboe@oracle.com> 2009-09-16 15:02:33 +0200
committer: Jens Axboe <jens.axboe@oracle.com> 2009-09-16 15:18:51 +0200
commit: 32a88aa1b6dfb901cec64e1898cac78d0f25028a
parent: c4a77a6c7dcff04a2abc7fe4b6b2ae605be41c5b
Commit Summary:
Diffstat:
1 file changed, 8 insertions, 1 deletion
diff --git a/fs/sync.c b/fs/sync.c
index 192340930bb4..c08467a5d7cb 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -27,6 +27,13 @@
*/
static int __sync_filesystem(struct super_block *sb, int wait)
{
+ /*
+ * This should be safe, as we require bdi backing to actually
+ * write out data in the first place
+ */
+ if (!sb->s_bdi)
+ return 0;
+
/* Avoid doing twice syncing and cache pruning for quota sync */
if (!wait) {
writeout_quota_sb(sb, -1);
@@ -101,7 +108,7 @@ restart:
spin_unlock(&sb_lock);
down_read(&sb->s_umount);
- if (!(sb->s_flags & MS_RDONLY) && sb->s_root)
+ if (!(sb->s_flags & MS_RDONLY) && sb->s_root && sb->s_bdi)
__sync_filesystem(sb, wait);
up_read(&sb->s_umount);