From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751379AbeDSInB (ORCPT ); Thu, 19 Apr 2018 04:43:01 -0400 Received: from mail-pl0-f65.google.com ([209.85.160.65]:33753 "EHLO mail-pl0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750799AbeDSIm6 (ORCPT ); Thu, 19 Apr 2018 04:42:58 -0400 X-Google-Smtp-Source: AIpwx4/ZtBfmMyoeBCq6VM4G0fCYA0qjbb4fpq/Y4FDFM5M+eQRGLOVAAhMftCRejVSxMYZCc1blDg== From: SeongJae Park To: paulmck@linux.vnet.ibm.com, corbet@lwn.net Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, SeongJae Park Subject: [PATCH 1/2] atomic_ops.rst: Fix wrong example code Date: Thu, 19 Apr 2018 17:42:44 +0900 Message-Id: <20180419084245.17096-1-sj38.park@gmail.com> X-Mailer: git-send-email 2.13.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Example code snippets for necessary of READ_ONCE() and WRITE_ONCE() has an unnecessary line of code and wrong condition. This commit fixes them. Signed-off-by: SeongJae Park --- Documentation/core-api/atomic_ops.rst | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/Documentation/core-api/atomic_ops.rst b/Documentation/core-api/atomic_ops.rst index fce929144ccd..4ea4af71e68a 100644 --- a/Documentation/core-api/atomic_ops.rst +++ b/Documentation/core-api/atomic_ops.rst @@ -111,7 +111,6 @@ If the compiler can prove that do_something() does not store to the variable a, then the compiler is within its rights transforming this to the following:: - tmp = a; if (a > 0) for (;;) do_something(); @@ -119,7 +118,7 @@ the following:: If you don't want the compiler to do this (and you probably don't), then you should use something like the following:: - while (READ_ONCE(a) < 0) + while (READ_ONCE(a) > 0) do_something(); Alternatively, you could place a barrier() call in the loop. -- 2.13.0