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authorDaniel Lezcano <daniel.lezcano@linaro.org>2014-01-17 10:04:03 +0100
committerIngo Molnar <mingo@kernel.org>2014-02-10 16:17:07 +0100
commit3c4017c13f91069194fce3160944efec50f15a6e (patch)
tree26c4c75063dcb2a3e0244b4776b76c5a218bbb58 /kernel/sched/sched.h
parentsched: Fix race in idle_balance() (diff)
downloadlinux-3c4017c13f91069194fce3160944efec50f15a6e.tar.xz
linux-3c4017c13f91069194fce3160944efec50f15a6e.zip
sched: Move rq->idle_stamp up to the core
idle_balance() modifies the rq->idle_stamp field, making this information shared across core.c and fair.c. As we know if the cpu is going to idle or not with the previous patch, let's encapsulate the rq->idle_stamp information in core.c by moving it up to the caller. The idle_balance() function returns true in case a balancing occured and the cpu won't be idle, false if no balance happened and the cpu is going idle. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: alex.shi@linaro.org Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1389949444-14821-3-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/sched.h')
-rw-r--r--kernel/sched/sched.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 82c0e02f2a58..bb89991ee409 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1158,7 +1158,7 @@ extern const struct sched_class idle_sched_class;
extern void update_group_power(struct sched_domain *sd, int cpu);
extern void trigger_load_balance(struct rq *rq);
-extern void idle_balance(struct rq *this_rq);
+extern int idle_balance(struct rq *this_rq);
extern void idle_enter_fair(struct rq *this_rq);
extern void idle_exit_fair(struct rq *this_rq);