From patchwork Wed Jan 17 20:20:53 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: 10171687 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 32EBE60386 for ; Wed, 17 Jan 2018 21:03:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2408C21E5A for ; Wed, 17 Jan 2018 21:03:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1897423201; Wed, 17 Jan 2018 21:03:17 +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 827AF21E5A for ; Wed, 17 Jan 2018 21:03:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753868AbeAQVDP (ORCPT ); Wed, 17 Jan 2018 16:03:15 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:37015 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753589AbeAQUWh (ORCPT ); Wed, 17 Jan 2018 15:22:37 -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=0gMKEn41sEQQ8rydM8ONdiHZ+WPLzqkRu7DXivUh31k=; b=X139ivviHqRVhDz3vsz7dLt/x BFV8kthyz/a7f19n7nM1DD4gQcNFNLphFzVi0STyiIfFsnnq8GIPULsThL/dSYom6D+v7H0/VqNK2 oYGL1fMHkVnUyJCKq1LRZ8cQTsw5jpgLIko9fxKFZhNB2Jm6qNhIVpkgUCBecW8DaZQfAjyL1VD2C S4cwsW6L/u96j7tWgbxyij3p7qIPXUuwJ53MJ+fukbVeSKRwId074DeVm+1uCevYyNQQ5lsc+8f1d 5OMqu4FkflqHXYbYe7Pd1xcR1hwDOiR2Lsxdf6NPySaRzJShWGAXWn/amhJb3bdtcIeLMpr1tie8v zP1zanh7Q==; Received: from willy by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1ebuEF-0005np-U3; Wed, 17 Jan 2018 20:22:35 +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 29/99] page cache: Convert filemap_range_has_page to XArray Date: Wed, 17 Jan 2018 12:20:53 -0800 Message-Id: <20180117202203.19756-30-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 Instead of calling find_get_pages_range() and putting any reference, just use xa_find() to look for a page in the right range. Signed-off-by: Matthew Wilcox --- mm/filemap.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 2536fcacb5bc..cd01f353cf6a 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -461,18 +461,11 @@ bool filemap_range_has_page(struct address_space *mapping, { pgoff_t index = start_byte >> PAGE_SHIFT; pgoff_t end = end_byte >> PAGE_SHIFT; - struct page *page; if (end_byte < start_byte) return false; - if (mapping->nrpages == 0) - return false; - - if (!find_get_pages_range(mapping, &index, end, 1, &page)) - return false; - put_page(page); - return true; + return xa_find(&mapping->pages, &index, end, XA_PRESENT); } EXPORT_SYMBOL(filemap_range_has_page);