40 lines
1.2 KiB
Diff
40 lines
1.2 KiB
Diff
|
From: Ben Hutchings <ben@decadent.org.uk>
|
||
|
Date: Sat, 28 Jun 2014 23:34:48 +0100
|
||
|
Subject: Fix latency histogram after "hrtimer: Set expiry time before switch_hrtimer_base()"
|
||
|
Forwarded: http://mid.gmane.org/1403994888.23472.116.camel@deadeye.wl.decadent.org.uk
|
||
|
|
||
|
In an rt-kernel with CONFIG_MISSED_TIMER_OFFSETS_HIST enabled,
|
||
|
__hrtimer_start_range_ns() now crashes, as new_base is not assigned
|
||
|
before it is used.
|
||
|
|
||
|
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
|
||
|
Tested-by: Carsten Emde <C.Emde@osadl.org>
|
||
|
Cc: stable-rt@vger.kernel.org
|
||
|
---
|
||
|
--- a/kernel/hrtimer.c
|
||
|
+++ b/kernel/hrtimer.c
|
||
|
@@ -1106,6 +1106,11 @@ int __hrtimer_start_range_ns(struct hrti
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
+ hrtimer_set_expires_range_ns(timer, tim, delta_ns);
|
||
|
+
|
||
|
+ /* Switch the timer base, if necessary: */
|
||
|
+ new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
|
||
|
+
|
||
|
#ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST
|
||
|
{
|
||
|
ktime_t now = new_base->get_time();
|
||
|
@@ -1117,11 +1122,6 @@ int __hrtimer_start_range_ns(struct hrti
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
- hrtimer_set_expires_range_ns(timer, tim, delta_ns);
|
||
|
-
|
||
|
- /* Switch the timer base, if necessary: */
|
||
|
- new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
|
||
|
-
|
||
|
timer_stats_hrtimer_set_start_info(timer);
|
||
|
|
||
|
leftmost = enqueue_hrtimer(timer, new_base);
|