From patchwork Fri May 29 02:58:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11577483 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 911641392 for ; Fri, 29 May 2020 02:58:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 53D6D2075F for ; Fri, 29 May 2020 02:58:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="nqrLqlkl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53D6D2075F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id EFD48800B7; Thu, 28 May 2020 22:58:29 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 59AF4800C3; Thu, 28 May 2020 22:58:29 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1029A800BA; Thu, 28 May 2020 22:58:29 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0197.hostedemail.com [216.40.44.197]) by kanga.kvack.org (Postfix) with ESMTP id CFB5A800B7 for ; Thu, 28 May 2020 22:58:28 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 87FF3181AEF0B for ; Fri, 29 May 2020 02:58:28 +0000 (UTC) X-FDA: 76868248296.05.work24_fc256e3d0119 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin05.hostedemail.com (Postfix) with ESMTP id 73C171802D51A for ; Fri, 29 May 2020 02:58:28 +0000 (UTC) X-Spam-Summary: 2,0,0,75087ea74f4b104e,d41d8cd98f00b204,willy@infradead.org,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1311:1314:1345:1359:1437:1515:1534:1540:1711:1730:1747:1777:1792:2393:2559:2562:3138:3139:3140:3141:3142:3352:3865:3868:3871:5007:6261:6653:7576:10004:11026:11658:11914:12043:12296:12297:12438:12555:12895:13069:13311:13357:13894:14096:14181:14384:14394:14721:21080:21451:21627:30054,0,RBL:198.137.202.133:@infradead.org:.lbl8.mailshell.net-64.201.201.201 62.8.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: work24_fc256e3d0119 X-Filterd-Recvd-Size: 2542 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf20.hostedemail.com (Postfix) with ESMTP for ; Fri, 29 May 2020 02:58:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=dCuwc6lPrWLCWGlcIKBzmB9RkztZJkAJ0HO0XKrh/mk=; b=nqrLqlklg9zWWrebiQnuM/OYkv RccBmN311y6GSCPJeWIqyVsJ/c/JdGMsnNuMUhsesOUqWSvhdiKAEF4+1J9ZE3HloliuvNwrTuS/5 IP9//JHm02AMD3/scahLwvwlWnDYI6v1GKWPRB7nFmS80halFRtjT/3EU9fCDSQoL3YvlfFd/Cm8v l0k9rhpmmoEkw77bK3BGQSPAfUQVsyL4gForquL+bUtPP/em7CBroOBtbSjrHGcSF4W6IUJwoFMRK U1afh1r6WCAmXnyZY1Uriu/SXK/4oD/2dnD+Tf35LY/Q5LvbQeWtctXDCSjAj0y59zuolC2vcLVEo AHtGsz7A==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jeVE3-0008Rk-9a; Fri, 29 May 2020 02:58:27 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 19/39] iomap: Handle tail pages in iomap_page_mkwrite Date: Thu, 28 May 2020 19:58:04 -0700 Message-Id: <20200529025824.32296-20-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200529025824.32296-1-willy@infradead.org> References: <20200529025824.32296-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: 73C171802D51A X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: "Matthew Wilcox (Oracle)" iomap_page_mkwrite() can be called with a tail page. If we are, operate on the head page, since we're treating the entire thing as a single unit and the whole page is dirtied at the same time. Signed-off-by: Matthew Wilcox (Oracle) --- fs/iomap/buffered-io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 5b37844b7d97..78098b94fade 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1064,7 +1064,7 @@ iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length, vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops) { - struct page *page = vmf->page; + struct page *page = compound_head(vmf->page); struct inode *inode = file_inode(vmf->vma->vm_file); unsigned long length; loff_t offset;