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authorChristoph Hellwig <hch@lst.de>2010-06-08 20:14:51 +0400
committerJens Axboe <jaxboe@fusionio.com>2010-06-11 14:58:07 +0400
commitcf37e972478ec58a8a54a6b4f951815f0ae28f78 (patch)
treeb14d75074692ddb213e22e098a64087950f4cf78 /fs/ubifs
parent3c4d716538f3eefb1c1f10961a047a6456a2b590 (diff)
downloadlinux-cf37e972478ec58a8a54a6b4f951815f0ae28f78.tar.xz
writeback: enforce s_umount locking in writeback_inodes_sb
Make sure that not only sync_filesystem but all callers of writeback_inodes_sb have the superblock protected against remount. As-is this disables all functionality for these callers, but the next patch relies on this locking to fix writeback_inodes_sb for sync_filesystem. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/budget.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c
index 076ca50e9933..c8ff0d1ae5d3 100644
--- a/fs/ubifs/budget.c
+++ b/fs/ubifs/budget.c
@@ -62,7 +62,9 @@
*/
static void shrink_liability(struct ubifs_info *c, int nr_to_write)
{
+ down_read(&c->vfs_sb->s_umount);
writeback_inodes_sb(c->vfs_sb);
+ up_read(&c->vfs_sb->s_umount);
}
/**