From: akpm@linux-foundation.org Subject: [merged] proc-dont-use-read_once-write_once-for-proc-fail-nth.patch removed from -mm tree Date: Wed, 07 Feb 2018 11:55:50 -0800 Message-ID: <20180207195550.2flII935q%akpm@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from mail.linuxfoundation.org ([140.211.169.12]:58116 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754002AbeBGTzw (ORCPT ); Wed, 7 Feb 2018 14:55:52 -0500 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: adobriyan@gmail.com, akinobu.mita@gmail.com, mm-commits@vger.kernel.org The patch titled Subject: proc: don't use READ_ONCE/WRITE_ONCE for /proc/*/fail-nth has been removed from the -mm tree. Its filename was proc-dont-use-read_once-write_once-for-proc-fail-nth.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Alexey Dobriyan Subject: proc: don't use READ_ONCE/WRITE_ONCE for /proc/*/fail-nth READ_ONCE and WRITE_ONCE are useless when there is only one read/write is being made. Link: http://lkml.kernel.org/r/20171120204033.GA9446@avx2 Signed-off-by: Alexey Dobriyan Cc: Akinobu Mita Signed-off-by: Andrew Morton --- fs/proc/base.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff -puN fs/proc/base.c~proc-dont-use-read_once-write_once-for-proc-fail-nth fs/proc/base.c --- a/fs/proc/base.c~proc-dont-use-read_once-write_once-for-proc-fail-nth +++ a/fs/proc/base.c @@ -1370,7 +1370,7 @@ static ssize_t proc_fail_nth_write(struc task = get_proc_task(file_inode(file)); if (!task) return -ESRCH; - WRITE_ONCE(task->fail_nth, n); + task->fail_nth = n; put_task_struct(task); return count; @@ -1386,8 +1386,7 @@ static ssize_t proc_fail_nth_read(struct task = get_proc_task(file_inode(file)); if (!task) return -ESRCH; - len = snprintf(numbuf, sizeof(numbuf), "%u\n", - READ_ONCE(task->fail_nth)); + len = snprintf(numbuf, sizeof(numbuf), "%u\n", task->fail_nth); len = simple_read_from_buffer(buf, count, ppos, numbuf, len); put_task_struct(task); _ Patches currently in -mm which might be from adobriyan@gmail.com are seq_file-delete-small-value-optimization.patch