allow attaching fs_pin to a group not associated with some superblock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/super.c b/fs/super.c
index eae088f..2d82245 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -706,9 +706,9 @@
remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY);
if (remount_ro) {
- if (sb->s_pins.first) {
+ if (!hlist_empty(&sb->s_pins)) {
up_write(&sb->s_umount);
- sb_pin_kill(sb);
+ group_pin_kill(&sb->s_pins);
down_write(&sb->s_umount);
if (!sb->s_root)
return 0;