Re: [PATCH] sh: remove unused setup_profiling_timer function

[Anthony Iliopoulos <ailiop@suse.com>]

On Fri, Aug 21, 2026 at 09:36:46AM +0200, Geert Uytterhoeven wrote:
> Hi Anthony,
> 
> Thanks for your patch!
> 
> On Fri, 21 Aug 2026 at 09:27, Anthony Iliopoulos <ailiop@suse.com> wrote:
> > setup_profiling_timer() is not used by any code at this point. Since a
> 
> It is used in write_profile()
> https://elixir.bootlin.com/linux/v7.2/source/kernel/profile.c#L202
> 
> > default weak implementation exists, there is no need to keep this
> > arch-specific definition around. Remove it along with the now-redundant
> > profile header includes.
> >
> > Signed-off-by: Anthony Iliopoulos <ailiop@suse.com>
> 
> > --- a/arch/sh/kernel/smp.c
> > +++ b/arch/sh/kernel/smp.c
> > @@ -21,7 +21,6 @@
> >  #include <linux/sched/hotplug.h>
> >  #include <linux/atomic.h>
> >  #include <linux/clockchips.h>
> > -#include <linux/profile.h>
> >
> >  #include <asm/processor.h>
> >  #include <asm/mmu_context.h>
> > @@ -322,14 +321,6 @@ void smp_message_recv(unsigned int msg)
> >         }
> >  }
> >
> > -#ifdef CONFIG_PROFILING
> > -/* Not really SMP stuff ... */
> > -int setup_profiling_timer(unsigned int multiplier)
> > -{
> > -       return 0;
> 
> This returns zero (success), while the default weak implementation
> returns -EINVAL, so your change breaks write_profile().
> https://elixir.bootlin.com/linux/v7.2/source/kernel/profile.c#L181

Thanks for the review, yes the plan was to also remove the call entirely
from profile code itself, so that the resetting functionality can remain
and the arch-specific stubs could be dropped. I should clearly have sent
that patch first. I just did it now:

https://lore.kernel.org/all/20260821091744.91496-1-ailiop@suse.com/

Regards,
Anthony