On Tue, Oct 15, 2013 at 06:14:01PM +0200, Matthias Dübon wrote:
> Hello everyone,
Hi,
> I am just experimenting with the RT preempt patch
> patch-3.10.15-rt11.patch.bz2 and a 3.10.16 kernel for x86 architecture
> with a "standard" .config file.
Standard as in 'make defconfig' or standard as in 'what my distro uses'?
> I configured CONFIG_PREEMPT_RT_FULL=y
>
> when building the kernel I got the following error:
>
> "kernel/softirq.c: In function ‘invoke_softirq’:
> kernel/softirq.c:710:3: error: implicit declaration of function
> ‘do_softirq’ [-Werror=implicit-function-declaration]"
>
> Is this related to my kernel configuration?
Not easy to say without the actual .config.
However, I did note one thing. You are using the preempt-rt patch for
3.10.15 and you apply it to 3.10.16 (or was that a typo?)
When I try to do the same thing; lo and behold, I get a reject in
kernel/softirq.c.
$ cat kernel/softirq.c.rej
--- kernel/softirq.c
+++ kernel/softirq.c
@@ -698,10 +1066,20 @@
static inline void invoke_softirq(void)
{
+#ifndef CONFIG_PREEMPT_RT_FULL
if (!force_irqthreads)
__do_softirq();
else
wakeup_softirqd();
+#else /* PREEMPT_RT_FULL */
+ unsigned long flags;
+
+ local_irq_save(flags);
+ if (__this_cpu_read(ksoftirqd) &&
+ __this_cpu_read(ksoftirqd)->softirqs_raised)
+ wakeup_softirqd();
+ local_irq_restore(flags);
+#endif
}
static inline void tick_irq_exit(void)
Do you see anything suspicious here? :)
Try to use v3.10.15 and recompile. I think that'll work a bit better.
--
Henrik Austad
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