tree 03a1788ff0601554fca2c0fce2476548c80c78bd
parent a7e252af5a819eb71c9494e62b2bfca982e92f84
author David Sterba <dsterba@suse.cz> 1386348692 +0100
committer Chris Mason <clm@fb.com> 1386861098 -0800

btrfs: call mnt_drop_write after interrupted subvol deletion

If btrfs_ioctl_snap_destroy blocks on the mutex and the process is
killed, mnt_write count is unbalanced and leads to unmountable
filesystem.

CC: stable@vger.kernel.org
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>