On Wed, Jul 27, 2011 at 11:37:09PM +0200, Thomas Gleixner wrote:

Dear RT Folks,

I'm pleased to announce the 3.0-rt4 release.

Building error if !PREEMPT_RT:

  CC      kernel/hrtimer.o
kernel/hrtimer.c: In function ‘hrtimer_interrupt’:
kernel/hrtimer.c:1459:27: error: ‘hrtimer_wakeup’ undeclared (first use in this function)
kernel/hrtimer.c:1459:27: note: each undeclared identifier is reported only
  once for each function it appears in
make[1]: *** [kernel/hrtimer.o] Error 1

Patch is here and seems it could be scrolled into
hrtimer-fixup-hrtimer-callback-changes-for-preempt-r.patch :)

Thanks,
Yong

---

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 38343f8..a7ec41a 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c

@@ -1295,10 +1295,10 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
 }
 
 
-#ifdef CONFIG_PREEMPT_RT_BASE