From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752508AbdLLPK0 (ORCPT ); Tue, 12 Dec 2017 10:10:26 -0500 Received: from terminus.zytor.com ([65.50.211.136]:38823 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751274AbdLLPKX (ORCPT ); Tue, 12 Dec 2017 10:10:23 -0500 Date: Tue, 12 Dec 2017 07:06:40 -0800 From: tip-bot for Mark Rutland Message-ID: Cc: mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, paulmck@linux.vnet.ibm.com, torvalds@linux-foundation.org, acme@redhat.com, linux-kernel@vger.kernel.org, joe@perches.com, hpa@zytor.com, mark.rutland@arm.com Reply-To: paulmck@linux.vnet.ibm.com, mingo@kernel.org, tglx@linutronix.de, peterz@infradead.org, linux-kernel@vger.kernel.org, joe@perches.com, torvalds@linux-foundation.org, acme@redhat.com, hpa@zytor.com, mark.rutland@arm.com In-Reply-To: <20171127103824.36526-2-mark.rutland@arm.com> References: <20171127103824.36526-2-mark.rutland@arm.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:locking/urgent] tools/perf: Convert ACCESS_ONCE() to READ_ONCE() Git-Commit-ID: f971e511cb7d6f1b3730248cf2967d3ccdd8874c 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: f971e511cb7d6f1b3730248cf2967d3ccdd8874c Gitweb: https://git.kernel.org/tip/f971e511cb7d6f1b3730248cf2967d3ccdd8874c Author: Mark Rutland AuthorDate: Mon, 27 Nov 2017 10:38:21 +0000 Committer: Ingo Molnar CommitDate: Tue, 12 Dec 2017 13:22:09 +0100 tools/perf: Convert ACCESS_ONCE() to READ_ONCE() Recently there was a treewide conversion of ACCESS_ONCE() to {READ,WRITE}_ONCE(), but a new use was introduced concurrently by commit: 1695849735752d2a ("perf mmap: Move perf_mmap and methods to separate mmap.[ch] files") Let's convert this over to READ_ONCE() so that we can remove the ACCESS_ONCE() definitions in subsequent patches. Tested-by: Paul E. McKenney Signed-off-by: Mark Rutland Reviewed-by: Paul E. McKenney Cc: Arnaldo Carvalho de Melo Cc: Joe Perches Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: apw@canonical.com Link: http://lkml.kernel.org/r/20171127103824.36526-2-mark.rutland@arm.com Signed-off-by: Ingo Molnar --- tools/perf/util/mmap.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index efd78b8..3a5cb5a 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -70,7 +70,7 @@ void perf_mmap__read_catchup(struct perf_mmap *md); static inline u64 perf_mmap__read_head(struct perf_mmap *mm) { struct perf_event_mmap_page *pc = mm->base; - u64 head = ACCESS_ONCE(pc->data_head); + u64 head = READ_ONCE(pc->data_head); rmb(); return head; }