The patch titled
Subject: posix-timers: give lazy compilers some help optimizing code away
has been added to the -mm tree. Its filename is
posix-timers-give-lazy-compilers-some-help-optimizing-code-away.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/posix-timers-give-lazy-compilers-some-help-optimizing-code-away.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/posix-timers-give-lazy-compilers-some-help-optimizing-code-away.patch
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------------------------------------------------------
From: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>
Subject: posix-timers: give lazy compilers some help optimizing code away
The OpenRISC compiler (so far) fails to optimize away a large portion
of code containing a reference to posix_timer_event in alarmtimer.c when
CONFIG_POSIX_TIMERS is unset. Let's give it a direct clue to let the build
succeed.
This fixes
[linux-next:master 6682/7183] alarmtimer.c:undefined reference to `posix_timer_event'
reported by kbuild test robot.
Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/time/alarmtimer.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN kernel/time/alarmtimer.c~posix-timers-give-lazy-compilers-some-help-optimizing-code-away kernel/time/alarmtimer.c
--- a/kernel/time/alarmtimer.c~posix-timers-give-lazy-compilers-some-help-optimizing-code-away
+++ a/kernel/time/alarmtimer.c
@@ -483,7 +483,8 @@ static enum alarmtimer_restart alarm_han
spin_lock_irqsave(&ptr->it_lock, flags);
if ((ptr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) {
- if (posix_timer_event(ptr, 0) != 0)
+ if (IS_ENABLED(CONFIG_POSIX_TIMERS) &&
+ posix_timer_event(ptr, 0) != 0)
ptr->it_overrun++;
}
_
Patches currently in -mm which might be from nicolas.pitre@xxxxxxxxxx are
posix-timers-give-lazy-compilers-some-help-optimizing-code-away.patch
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