static void unpin_and_kill(struct inotify_watch *watch, int how)
{
	struct super_block *sb = watch->inode->i_sb;
	put_inotify_watch(watch);
	switch (how) {
	case 1:
		deactivate_super(sb);
		break;
	case 2:
		drop_super(sb);
	}
}
static void unpin_and_kill(struct inotify_watch *watch, int how)
{
	struct super_block *sb = watch->inode->i_sb;
	put_inotify_watch(watch);
	switch (how) {
	case 1:
		deactivate_super(sb);
		break;
	case 2:
		drop_super(sb);
	}
}