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authorThomas Gleixner <tglx@linutronix.de>2011-07-17 20:08:38 (GMT)
committerScott Wood <scottwood@freescale.com>2014-05-14 18:38:28 (GMT)
commitd6b8f4a6bb6eedaa4a30fd55acd147a246add9f0 (patch)
treede35a2324a195367cb09d46192a1e4636e4f5e65 /kernel/timer.c
parent13e88d8d6ebf00afd80988c323c3892021767e25 (diff)
downloadlinux-fsl-qoriq-d6b8f4a6bb6eedaa4a30fd55acd147a246add9f0.tar.xz
timer-handle-idle-trylock-in-get-next-timer-irq.patch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/timer.c')
-rw-r--r--kernel/timer.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/timer.c b/kernel/timer.c
index 4cb850d..bbe6d43 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1386,9 +1386,10 @@ unsigned long get_next_timer_interrupt(unsigned long now)
/*
* On PREEMPT_RT we cannot sleep here. If the trylock does not
* succeed then we return the worst-case 'expires in 1 tick'
- * value:
+ * value. We use the rt functions here directly to avoid a
+ * migrate_disable() call.
*/
- if (!spin_trylock(&base->lock))
+ if (!spin_do_trylock(&base->lock))
return now + 1;
#else
spin_lock(&base->lock);
@@ -1398,7 +1399,11 @@ unsigned long get_next_timer_interrupt(unsigned long now)
base->next_timer = __next_timer_interrupt(base);
expires = base->next_timer;
}
+#ifdef CONFIG_PREEMPT_RT_FULL
+ rt_spin_unlock(&base->lock);
+#else
spin_unlock(&base->lock);
+#endif
if (time_before_eq(expires, now))
return now;