sb->s_count++;
spin_unlock(&sb_lock);
down_read(&sb->s_umount);
- if (sb->s_root && sb->s_bdev && !(sb->s_flags & MS_RDONLY))
+ if (sb->s_root && sb->s_bdev && !(sb->s_flags & MS_RDONLY)) {
+ /*
+ * ->remount_fs needs lock_kernel().
+ *
+ * What lock protects sb->s_flags??
+ */
+ lock_kernel();
do_remount_sb(sb, MS_RDONLY, NULL, 1);
+ unlock_kernel();
+ }
drop_super(sb);
spin_lock(&sb_lock);
}