From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-362987-1516223003-2-13281346691288308410 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES enda, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-usb-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1516223003; b=O5dnO4KE4dvhnk3tzEX5RHEiY2FThNrRWM/7zNg1n7JyMx2 2qsPKCPvjWWrIeXgTILKe/DK0Q/UPuE9/OXP00EXRkNagYWc2WCuBMa0ylw+hvxb SWqFoRyQoOEM/9IZdEiTaGX+8qcQpi9gmSXOhl+PXzKuJdPdCaFuAsyQuS0EXQ53 51O0o7Ie9OcIDlXMmqoPkNF/GjAysZFMj5RutVJmllMjXkQcQzK8yEnSak0KOBWE J+IqIprKMfgJ/u0vUjw4Gg3dDHYg/ObKf/Lr/iz72HGhtDjp/Xt/5FjTGOM9zlqx +LiHJQn5/4HODoc2FaKKC1uOAL8QZHzGGv0fMHg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:sender:list-id; s=arctest; t=1516223003; bh=K0xRt0UCq+UlWr0+/J9YlPMrEKdVdS66JdJVGh81Y/A=; b=EHPOwNSvLZq4 qBoiglYYLd9KQOBkkJxVCCLoe94XNFbN4NNwLZZyKHAbLodJ5NPrRloVheSCA05N dCOX5HLbzABwz2aUMX3uNrB6qEYVyXe+7+7WBmQpvydli+k77UoDk+MuSIGy99j0 Ez/vJAHKMuANOUWVPv3+eOaaztFUW22jr8aU7IW/QGxs5Bb/4qNvp4uoHoH75Fdv l71nLPML+OOiJEzp2dK7ns0CCc9YtlpuhlNr2UcX2VBKFPhWUrfufmRXuRjAWtWg HCDIgOms5OMO6t1ohPHWCEqdy6NBqjyc929u6l37NxHj5AvCCL1zTQwypTT3tuyn +T1UuluFog== ARC-Authentication-Results: i=1; mx1.messagingengine.com; arc=none (no signatures found); dkim=fail (message has been altered; 2048-bit rsa key sha256) header.d=infradead.org header.i=@infradead.org header.b=X139ivvi x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=bombadil.20170209; dmarc=none (p=none,has-list-id=yes,d=none) header.from=infradead.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=infradead.org header.result=pass header_is_org_domain=yes Authentication-Results: mx1.messagingengine.com; arc=none (no signatures found); dkim=fail (message has been altered; 2048-bit rsa key sha256) header.d=infradead.org header.i=@infradead.org header.b=X139ivvi x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=bombadil.20170209; dmarc=none (p=none,has-list-id=yes,d=none) header.from=infradead.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=infradead.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754859AbeAQVDP (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 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-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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); -- 2.15.1