Re: error: implicit declaration of function ‘rq_modified_clear’ (was [PATCH 5/5] sched: Rework sched_class::wakeup_preempt() and rq_modified_*())

[Thorsten Leemhuis]

On 12/15/25 12:51, Nathan Chancellor wrote:
> On Mon, Dec 15, 2025 at 08:12:13AM +0100, Ingo Molnar wrote:
>>
>> * Thorsten Leemhuis <linux@xxxxxxxxxxxxx> wrote:
>>
>>> On 11/27/25 16:39, Peter Zijlstra wrote:
>>>> Change sched_class::wakeup_preempt() to also get called for
>>>> cross-class wakeups, specifically those where the woken task is of a
>>>> higher class than the previous highest class.
>>>
>>> I suspect you might be aware of this already, but this patch afaics
>>> broke compilation of today's -next for me, as reverting fixed things.
>>
>> Yeah, sorry about that, I fumbled a conflict resolution - should be
>> fixed for tomorrow's -next.
> 
> It looks like you cleared up the rq_modified_clear() error but
> rq_modified_above() is still present in kernel/sched/ext.c.

...which afaics causes this build error in today's next:

In file included from kernel/sched/build_policy.c:62:
kernel/sched/ext.c: In function ‘do_pick_task_scx’:
kernel/sched/ext.c:2470:27: error: implicit declaration of function ‘rq_modified_above’ [-Wimplicit-function-declaration]
 2470 |         if (!force_scx && rq_modified_above(rq, &ext_sched_class))
      |                           ^~~~~~~~~~~~~~~~~
make[4]: *** [scripts/Makefile.build:287: kernel/sched/build_policy.o] Error 1
make[3]: *** [scripts/Makefile.build:556: kernel/sched] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [scripts/Makefile.build:556: kernel] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/builddir/build/BUILD/kernel-6.19.0-build/kernel-next-20251216/linux-6.19.0-0.0.next.20251216.415.vanilla.fc44.x86_64/Makefile:2062: .] Error 2
make: *** [Makefile:256: __sub-make] Error 2

Ciao, Thorsten