sched/cputime: Expose cputime_adjust()

Will be used by basic cgroup resource stat reporting later.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>

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.

kernel/sched/cputime.c

@@ -585,9 +585,8 @@ drop_precision:
  *
  * Assuming that rtime_i+1 >= rtime_i.
  */
-static void cputime_adjust(struct task_cputime *curr,
+void cputime_adjust(struct task_cputime *curr, struct prev_cputime *prev,
-			   struct prev_cputime *prev,
+		    u64 *ut, u64 *st)
-			   u64 *ut, u64 *st)
 {
 	u64 rtime, stime, utime;
 	unsigned long flags;