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 <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Fixes: 10ab56434f2f ("sched/core: Separate out io_schedule_prepare() and 
io_schedule_finish()")
Cc: <[email protected]> # 4.11+
Signed-off-by: Gao Xiang <[email protected]>
---
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

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