From patchwork Tue Jun 15 13:24:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 460601 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35E9AC48BE5 for ; Tue, 15 Jun 2021 13:26:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C55E6145D for ; Tue, 15 Jun 2021 13:26:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230184AbhFON2b (ORCPT ); Tue, 15 Jun 2021 09:28:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53638 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230452AbhFON2a (ORCPT ); Tue, 15 Jun 2021 09:28:30 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42C10C061574; Tue, 15 Jun 2021 06:26:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=tk1mvrcMufCVrgPg3C2xpZf19iy4PPS7BLzt3IIAZvo=; b=wANQzPa41ytnopaUFssGsxbY/M 0hq96FVjjN51t4RFAdxzVXUFPl0WUQLIbryYoFCPF/RjQES70xir5/HgL6PJk1gNMd37GODvP/1Dm Uzt6nVMXjvWx9mYamO6qDeBp7iZ/XNXIGVbmPHNVofwUiqxf9BcX7viQOfbejADb2yzdjwQuWw1ez Qh42dGYWXVx7ED1ej5SSPI51boZURyYoc8+CShjqpV6o+VAVTSqlIA3wU+IjHhKuwUW7e4eZzbhFS uVX7vILZQklZV3RqCK7W6WJdHFzvyE3HhNauq8NtfVgWYDXTgLnBzDfEQrl8sh75f66KWeuxyh2XB dTCoPkmw==; Received: from [2001:4bb8:19b:fdce:9045:1e63:20f0:ca9] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1lt94D-006nuj-Vv; Tue, 15 Jun 2021 13:25:30 +0000 From: Christoph Hellwig To: Jens Axboe , Thomas Gleixner Cc: Thomas Bogendoerfer , Geoff Levand , Ilya Dryomov , Dongsheng Yang , Mike Snitzer , "James E.J. Bottomley" , Ira Weiny , dm-devel@redhat.com, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 02/18] mm: use kunmap_local_dirty in memcpy_to_page Date: Tue, 15 Jun 2021 15:24:40 +0200 Message-Id: <20210615132456.753241-3-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210615132456.753241-1-hch@lst.de> References: <20210615132456.753241-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org memcpy_to_page can write to potentially mapped page cache pages, so use kunmap_local_dirty to make sure flush_kernel_dcache_pages is called. Signed-off-by: Christoph Hellwig --- include/linux/highmem.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 65f548db4f2d..d0497c0daf80 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -333,7 +333,7 @@ static inline void memcpy_to_page(struct page *page, size_t offset, VM_BUG_ON(offset + len > PAGE_SIZE); memcpy(to + offset, from, len); - kunmap_local(to); + kunmap_local_dirty(page, to); } static inline void memzero_page(struct page *page, size_t offset, size_t len)