linux-kernel - [PATCH 1/3] sched/cputime: Expose cputime

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Date:   Fri, 11 Aug 2017 09:37:52 -0700
From:   Tejun Heo <tj@...nel.org>
To:     lizefan@...wei.com, hannes@...xchg.org, peterz@...radead.org,
        mingo@...hat.com, longman@...hat.com
Cc:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com, pjt@...gle.com, luto@...capital.net,
        efault@....de, torvalds@...ux-foundation.org, guro@...com,
        Tejun Heo <tj@...nel.org>
Subject: [PATCH 1/3] sched/cputime: Expose cputime_adjust()

Will be used by basic cgroup resource stat reporting later.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Li Zefan <lizefan@...wei.com>
Cc: Johannes Weiner <hannes@...xchg.org>
---
 include/linux/sched/cputime.h | 3 ++-
 kernel/sched/cputime.c        | 5 ++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/sched/cputime.h b/include/linux/sched/cputime.h
index 4c5b973..9251044 100644
--- a/include/linux/sched/cputime.h
+++ b/include/linux/sched/cputime.h
@@ -53,7 +53,8 @@ static inline void task_cputime_scaled(struct task_struct *t,
 
 extern void task_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
 extern void thread_group_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
-
+extern void cputime_adjust(struct task_cputime *curr, struct prev_cputime *prev,
+			   u64 *ut, u64 *st);
 
 /*
  * Thread group CPU time accounting.
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 6e3ea4a..3a8bfcc 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -585,9 +585,8 @@ static u64 scale_stime(u64 stime, u64 rtime, u64 total)
  *
  * Assuming that rtime_i+1 >= rtime_i.
  */
-static void cputime_adjust(struct task_cputime *curr,
-			   struct prev_cputime *prev,
-			   u64 *ut, u64 *st)
+void cputime_adjust(struct task_cputime *curr, struct prev_cputime *prev,
+		    u64 *ut, u64 *st)
 {
 	u64 rtime, stime, utime;
 	unsigned long flags;
-- 
2.9.3