linux-kernel - [PATCH v2] sched/core: add __sched tag for io

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Message-ID: <20190603091338.2695-1-gaoxiang25@huawei.com>
Date:   Mon, 3 Jun 2019 17:13:38 +0800
From:   Gao Xiang <gaoxiang25@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     LKML <linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
        "Ingo Molnar" <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        <stable@...r.kernel.org>, Miao Xie <miaoxie@...wei.com>,
        <koujilong@...wei.com>, Gao Xiang <gaoxiang25@...wei.com>
Subject: [PATCH v2] sched/core: add __sched tag for io_schedule()

non-inline io_schedule() was introduced in
commit 10ab56434f2f ("sched/core: Separate out io_schedule_prepare() and io_schedule_finish()")
Keep in line with io_schedule_timeout, Otherwise
"/proc/<pid>/wchan" will report io_schedule()
rather than its callers when waiting io.

Reported-by: Jilong Kou <koujilong@...wei.com>
Cc: Tejun Heo <tj@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Acked-by: Tejun Heo <tj@...nel.org>
Fixes: 10ab56434f2f ("sched/core: Separate out io_schedule_prepare() and io_schedule_finish()")
Cc: <stable@...r.kernel.org> # 4.11+
Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>
---
change log v2:
 - add missing tags

 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 874c427742a9..4d5962232a55 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5123,7 +5123,7 @@ long __sched io_schedule_timeout(long timeout)
 }
 EXPORT_SYMBOL(io_schedule_timeout);
 
-void io_schedule(void)
+void __sched io_schedule(void)
 {
 	int token;
 
-- 
2.17.1