proc_pid_readdir(): stop wanking with proc_fill_cache() for /proc/self

int proc_pid_readdir(struct file *file, struct dir_context *ctx)

{

	struct tgid_iter iter;

	struct pid_namespace *ns;

	struct pid_namespace *ns = file->f_dentry->d_sb->s_fs_info;

	loff_t pos = ctx->pos;

	if (pos >= PID_MAX_LIMIT + TGID_OFFSET)

		return 0;

	if (pos == TGID_OFFSET - 1) {

		if (!proc_fill_cache(file, ctx, "self", 4, NULL, NULL, NULL))

		struct inode *inode = ns->proc_self->d_inode;

		if (!dir_emit(ctx, "self", 4, inode->i_ino, DT_LNK))

			return 0;

		iter.tgid = 0;

	} else {

		iter.tgid = pos - TGID_OFFSET;

	}

	iter.task = NULL;

	ns = file->f_dentry->d_sb->s_fs_info;

	for (iter = next_tgid(ns, iter);

	     iter.task;

	     iter.tgid += 1, iter = next_tgid(ns, iter)) {