2.6.15-rc5-rt4 fails to compile

2.6.15-rc5-rt4 fails to compile

[John Rigg]

I just tried to compile 2.6.15-rc5-rt4 on x86_64 SMP but it failed with the
following error:

kernel/hrtimer.c: In function 'hrtimer_cancel':
kernel/hrtimer.c:673: error: 'HRTIMER_SOFTIRQ' undeclared (first use in this function)
kernel/hrtimer.c:673: error: (Each undeclared identifier is reported only once
kernel/hrtimer.c:673: error: for each function it appears in.)
make[1]: *** [kernel/hrtimer.o] Error 1
make: *** [kernel] Error 2

HRTIMER_SOFTIRQ is defined in include/linux/interrupt.h on line 24, but it's
dependent on
#ifdef CONFIG_HIGH_RES_TIMERS
which I haven't set in my .config. It's inside an enum so I can't
just remove the #ifdef and make it always defined without changing
the value of the following enum element (not sure what will break if
I try that).

John

Re: 2.6.15-rc5-rt4 fails to compile - question

[John Rigg]

On Wednesday Dec 21 2005 John Rigg wrote:
> 2.6.14-rc5-rt4
> failed to compile
> on x86_64 SMP
>
> kernel/hrtimer.c: In function 'hrtimer_cancel':
> kernel/hrtimer.c:673: error: 'HRTIMER_SOFTIRQ' undeclared (first use in this function)
> kernel/hrtimer.c:673: error: (Each undeclared identifier is reported only once
> kernel/hrtimer.c:673: error: for each function it appears in.)
> make[1]: *** [kernel/hrtimer.o] Error 1
> make: *** [kernel] Error 2

The obvious way to get it to compile would be to use CONFIG_HIGH_RES_TIMERS=y .
Stupid question: how do I enable this on x86_64 SMP?
I can't find it in menuconfig and if I edit .config manually my edits just
get deleted (obviously I'm doing something wrong). I've tried grepping the
source and googling, but haven't been able to find the answer.

John

2.6.15-rc5-rt4 fails to compile

[Jan Engelhardt]

Hi Ingo,


CONFIG_RWSEM_GENERIC_SPINLOCK is always y when PREEMPT_RT=y, but (see 
linux/rwsem.h) in this case, <linux/rwsem-semaphore.h> is included, which 
lacks macros like RWSEM_ACTIVE_BIAS used in lib/rwsem.c.


Jan Engelhardt
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