From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: linux-next: manual merge of the tip tree with the pm tree
Date: Fri, 9 May 2014 14:49:47 +1000 [thread overview]
Message-ID: <20140509144947.1dcd9098@canb.auug.org.au> (raw)
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Hi all,
Today's linux-next merge of the tip tree got a conflict in
kernel/sched/idle.c between commit 52c324f8a87b ("cpuidle: Combine
cpuidle_enabled() with cpuidle_select()") from the pm tree and commit
37352273ad48 ("sched/idle: Reflow cpuidle_idle_call()") from the tip
tree.
I fixed it up (I hope - see below) and can carry the fix as necessary
(no action is required).
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
diff --cc kernel/sched/idle.c
index a8f12247ce7c,34083c9ac976..000000000000
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@@ -101,77 -98,74 +98,69 @@@ static void cpuidle_idle_call(void
rcu_idle_enter();
/*
- * Check if the cpuidle framework is ready, otherwise fallback
- * to the default arch specific idle method
+ * Ask the cpuidle framework to choose a convenient idle state.
+ * Fall back to the default arch specific idle method on errors.
*/
- if (cpuidle_enabled(drv, dev)) {
+ next_state = cpuidle_select(drv, dev);
+
- ret = next_state;
- if (ret >= 0) {
++ if (next_state < 0) {
+ use_default:
/*
- * The idle task must be scheduled, it is pointless to
- * go to idle, just update no idle residency and get
- * out of this function
+ * We can't use the cpuidle framework, let's use the default
+ * idle routine.
*/
- if (current_clr_polling_and_test()) {
- dev->last_residency = 0;
- entered_state = next_state;
+ if (current_clr_polling_and_test())
local_irq_enable();
- } else {
- broadcast = !!(drv->states[next_state].flags &
- CPUIDLE_FLAG_TIMER_STOP);
-
- if (broadcast)
- /*
- * Tell the time framework to switch
- * to a broadcast timer because our
- * local timer will be shutdown. If a
- * local timer is used from another
- * cpu as a broadcast timer, this call
- * may fail if it is not available
- */
- ret = clockevents_notify(
- CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
- &dev->cpu);
-
- if (ret >= 0) {
- trace_cpu_idle_rcuidle(next_state, dev->cpu);
-
- /*
- * Enter the idle state previously
- * returned by the governor
- * decision. This function will block
- * until an interrupt occurs and will
- * take care of re-enabling the local
- * interrupts
- */
- entered_state = cpuidle_enter(drv, dev,
- next_state);
-
- trace_cpu_idle_rcuidle(PWR_EVENT_EXIT,
- dev->cpu);
-
- if (broadcast)
- clockevents_notify(
- CLOCK_EVT_NOTIFY_BROADCAST_EXIT,
- &dev->cpu);
-
- /*
- * Give the governor an opportunity to reflect on the
- * outcome
- */
- cpuidle_reflect(dev, entered_state);
- }
- }
+ else
+ arch_cpu_idle();
+
+ goto exit_idle;
+ }
+
+ /*
- * Ask the governor to choose an idle state it thinks
- * it is convenient to go to. There is *always* a
- * convenient idle state
- */
- next_state = cpuidle_select(drv, dev);
-
- /*
+ * The idle task must be scheduled, it is pointless to
+ * go to idle, just update no idle residency and get
+ * out of this function
+ */
+ if (current_clr_polling_and_test()) {
+ dev->last_residency = 0;
+ entered_state = next_state;
+ local_irq_enable();
+ goto exit_idle;
}
+ broadcast = !!(drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP);
+
/*
- * We can't use the cpuidle framework, let's use the default
- * idle routine
+ * Tell the time framework to switch to a broadcast timer
+ * because our local timer will be shutdown. If a local timer
+ * is used from another cpu as a broadcast timer, this call may
+ * fail if it is not available
*/
- if (ret < 0)
- arch_cpu_idle();
+ if (broadcast &&
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu))
++ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu) < 0)
+ goto use_default;
+ trace_cpu_idle_rcuidle(next_state, dev->cpu);
+
+ /*
+ * Enter the idle state previously returned by the governor decision.
+ * This function will block until an interrupt occurs and will take
+ * care of re-enabling the local interrupts
+ */
+ entered_state = cpuidle_enter(drv, dev, next_state);
+
+ trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
+
+ if (broadcast)
+ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);
+
+ /*
+ * Give the governor an opportunity to reflect on the outcome
+ */
+ cpuidle_reflect(dev, entered_state);
+
+ exit_idle:
__current_set_polling();
/*
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next reply other threads:[~2014-05-09 4:49 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-09 4:49 Stephen Rothwell [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-02-17 5:07 linux-next: manual merge of the tip tree with the pm tree Stephen Rothwell
2021-02-17 10:15 ` Andy Shevchenko
2021-02-22 0:34 ` Stephen Rothwell
2018-10-08 2:44 Stephen Rothwell
2018-10-08 10:06 ` Rafael J. Wysocki
2018-10-08 10:34 ` Andy Shevchenko
2018-10-08 2:40 Stephen Rothwell
2018-10-08 10:05 ` Rafael J. Wysocki
2018-10-08 10:41 ` Andy Shevchenko
2018-03-23 2:20 Stephen Rothwell
2018-03-23 6:09 ` Ingo Molnar
2018-03-23 21:09 ` Rafael J. Wysocki
2018-03-24 8:15 ` Ingo Molnar
2017-11-06 2:10 Stephen Rothwell
2017-11-06 13:09 ` Rafael J. Wysocki
2017-08-11 4:06 Stephen Rothwell
2017-09-04 4:43 ` Stephen Rothwell
2016-11-22 5:48 Stephen Rothwell
2016-06-09 4:34 Stephen Rothwell
2016-04-19 2:59 Stephen Rothwell
2016-03-15 1:55 Stephen Rothwell
2016-03-11 1:57 Stephen Rothwell
2016-03-11 13:51 ` Rafael J. Wysocki
2016-02-29 4:42 Stephen Rothwell
2015-10-06 3:07 Stephen Rothwell
2015-03-31 7:58 Stephen Rothwell
2015-03-31 22:23 ` Rafael J. Wysocki
2015-03-31 7:10 Stephen Rothwell
2014-12-15 2:30 Stephen Rothwell
2014-11-25 5:46 Stephen Rothwell
2014-11-25 21:16 ` Rafael J. Wysocki
2014-08-04 6:55 Stephen Rothwell
2014-01-13 3:29 Stephen Rothwell
2014-01-07 4:20 Stephen Rothwell
2014-01-06 7:18 Stephen Rothwell
2013-08-19 4:09 Stephen Rothwell
2013-04-11 4:08 Stephen Rothwell
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