From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965341AbeBMRAA (ORCPT ); Tue, 13 Feb 2018 12:00:00 -0500 Received: from terminus.zytor.com ([198.137.202.136]:38373 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965261AbeBMQ74 (ORCPT ); Tue, 13 Feb 2018 11:59:56 -0500 Date: Tue, 13 Feb 2018 08:59:31 -0800 From: tip-bot for Alexey Dobriyan Message-ID: Cc: mingo@kernel.org, peterz@infradead.org, adobriyan@gmail.com, hpa@zytor.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, bp@suse.de, torvalds@linux-foundation.org Reply-To: peterz@infradead.org, adobriyan@gmail.com, hpa@zytor.com, mingo@kernel.org, torvalds@linux-foundation.org, bp@suse.de, tglx@linutronix.de, linux-kernel@vger.kernel.org In-Reply-To: <20180113185048.GA23111@avx2> References: <20180113185048.GA23111@avx2> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/asm] x86/asm: Clobber flags in clear_page() Git-Commit-ID: 1acdbf7ea8a80706561013346d281d282a3c00f9 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 1acdbf7ea8a80706561013346d281d282a3c00f9 Gitweb: https://git.kernel.org/tip/1acdbf7ea8a80706561013346d281d282a3c00f9 Author: Alexey Dobriyan AuthorDate: Sat, 13 Jan 2018 21:50:48 +0300 Committer: Ingo Molnar CommitDate: Tue, 13 Feb 2018 17:36:49 +0100 x86/asm: Clobber flags in clear_page() All clear_page() implementations use XOR which resets flags. Judging by allyesconfig disassembly no code is affected. Signed-off-by: Alexey Dobriyan Reviewed-by: Borislav Petkov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20180113185048.GA23111@avx2 Signed-off-by: Ingo Molnar --- arch/x86/include/asm/page_64.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h index 4baa6bc..f8a85c6 100644 --- a/arch/x86/include/asm/page_64.h +++ b/arch/x86/include/asm/page_64.h @@ -47,7 +47,7 @@ static inline void clear_page(void *page) clear_page_erms, X86_FEATURE_ERMS, "=D" (page), "0" (page) - : "memory", "rax", "rcx"); + : "cc", "memory", "rax", "rcx"); } void copy_page(void *to, void *from);