From patchwork Wed Jan 17 20:20:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 10171807 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 BCF586055D for ; Wed, 17 Jan 2018 21:09:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AEAFB23B32 for ; Wed, 17 Jan 2018 21:09:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A2F5523E64; Wed, 17 Jan 2018 21:09:45 +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=unavailable 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 5704823B3C for ; Wed, 17 Jan 2018 21:09:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753463AbeAQVJn (ORCPT ); Wed, 17 Jan 2018 16:09:43 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:49537 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753462AbeAQUWc (ORCPT ); Wed, 17 Jan 2018 15:22:32 -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=QBvHViXVnkVEPmgjEoQYNX4IHNnWrbJw+OscY9Dm/qw=; b=s432/WlHtq2r6+H7DZcEBuVKP Pj69E6eIV/HJGEWKz8dWArjxbQ/5bsibhCQnoRgVglHGCR4scNIiNGY32EVYbpu9YGy21rzUxSHUZ dJ0qkhHmePvrF9gQwJRN8MbbhiutzlWNkGj0Uhf8MOuEM6IE4RWU7LAlscRcyS85QP6O6T9rRF7Dh c09E8719hUQqD2gurpeJ6DLvQmxZ12Rh+dT2ar1JOpkYlEyd96PDBD7Pxy9MUOlYTV03+HEG2C0LJ 8AFyId6yy8w6Izdx4Hmc7YP/lqXwkGCudlz270er3erkhH1RkxbCH+BG6wDvEbKeMRXbsWZCAj6mb pHQKn52cw==; Received: from willy by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1ebuEA-0005kf-W9; Wed, 17 Jan 2018 20:22:31 +0000 From: Matthew Wilcox To: linux-kernel@vger.kernel.org Cc: Matthew Wilcox , 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, Bjorn Andersson , Stefano Stabellini , iommu@lists.linux-foundation.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, intel-gfx@lists.freedesktop.org, cgroups@vger.kernel.org, linux-sh@vger.kernel.org, David Howells Subject: [PATCH v6 16/99] xarray: Add xas_create_range Date: Wed, 17 Jan 2018 12:20:40 -0800 Message-Id: <20180117202203.19756-17-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180117202203.19756-1-willy@infradead.org> References: <20180117202203.19756-1-willy@infradead.org> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@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 01ce313fc00e..acb6d02ff194 100644 --- a/include/linux/xarray.h +++ b/include/linux/xarray.h @@ -705,6 +705,8 @@ 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 e8ece1fff9fd..c044373d6893 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -612,6 +612,28 @@ 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, void *curr, int *countp, int *valuesp) {