From patchwork Wed Dec 6 00:41:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10094391 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1CAAC60329 for ; Wed, 6 Dec 2017 00:50:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D76028C9A for ; Wed, 6 Dec 2017 00:50:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0B7D129B49; Wed, 6 Dec 2017 00:50:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8C37429C01 for ; Wed, 6 Dec 2017 00:50:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753390AbdLFAmP (ORCPT ); Tue, 5 Dec 2017 19:42:15 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:48847 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753249AbdLFAmJ (ORCPT ); Tue, 5 Dec 2017 19:42:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ln8DVnVmZ/F8lfnVUjv5FGoEKLoDa90dAa4HcLubwzQ=; b=iA7nIfTljJ2VFoaKPgIypoVnp TR/hzhzsk0gUMA//34JSHZJIeNRVQ8eSXxFArDUhVA7vLEXyNvh9NsmVcuD3zf3Wlu2oLz/LluDHa 5QtuFmbv432C0vJL2X42YBYkANFrF7yLG7IqngYJsWFvwWr7kV+jbUuwoi738aQehUJEDPeXRLSYf DeMS0zkRBrJGoy5b7k6ZCc71uIUPC8u+XizeIQybXRVIOIeCANCc6VJed4WF4JyM3Mf91+3pVmN1x fM1Y9fCdce9gSdMCHkdSTSv61EWHebVc0Fi9ImCEXd/O139e6l53L73FWGg8O8KXMuAl/xZd351cg H9utW9YLg==; Received: from willy by bombadil.infradead.org with local (Exim 4.87 #1 (Red Hat Linux)) id 1eMNmp-00012G-7J; Wed, 06 Dec 2017 00:42:07 +0000 From: Matthew Wilcox Cc: Matthew Wilcox , Ross Zwisler , Jens Axboe , Rehas Sachdeva , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 18/73] xarray: Add xas_create_range Date: Tue, 5 Dec 2017 16:41:04 -0800 Message-Id: <20171206004159.3755-19-willy@infradead.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20171206004159.3755-1-willy@infradead.org> References: <20171206004159.3755-1-willy@infradead.org> To: unlisted-recipients:; (no To-header on input) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox This hopefully temporary function is useful for users who have not yet been converted to multi-index entries. Signed-off-by: Matthew Wilcox --- include/linux/xarray.h | 2 ++ lib/xarray.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/linux/xarray.h b/include/linux/xarray.h index 416708ace115..afa3374f20bd 100644 --- a/include/linux/xarray.h +++ b/include/linux/xarray.h @@ -594,6 +594,8 @@ void xas_init_tags(const struct xa_state *); bool xas_nomem(struct xa_state *, gfp_t); void xas_pause(struct xa_state *); +void xas_create_range(struct xa_state *, unsigned long max); + /** * xas_reload() - Refetch an entry from the xarray. * @xas: XArray operation state. diff --git a/lib/xarray.c b/lib/xarray.c index 8c6e83d10554..cc88df7bd6df 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -570,6 +570,28 @@ void *xas_create(struct xa_state *xas) } EXPORT_SYMBOL_GPL(xas_create); +/** + * xas_create_range() - Ensure that stores to this range will succeed + * @xas: XArray operation state. + * @max: The highest index to create a slot for. + * + * Creates all of the slots in the range between the current position of + * @xas and @max. This is for the benefit of users who have not yet been + * converted to multi-index entries. + * + * The implementation is naive. + */ +void xas_create_range(struct xa_state *xas, unsigned long max) +{ + XA_STATE(tmp, xas->xa, xas->xa_index); + + do { + xas_create(&tmp); + xas_set(&tmp, tmp.xa_index + XA_CHUNK_SIZE); + } while (tmp.xa_index < max); +} +EXPORT_SYMBOL_GPL(xas_create_range); + static void store_siblings(struct xa_state *xas, void *entry, int *countp, int *valuesp) {