Re: [PATCH v2 09/23] m68k: use asm-generic/mmu_context.h for no-op implementations

Nicholas Piggin
2020-09-01T06:23:55Z

Excerpts from Geert Uytterhoeven's message of August 27, 2020 7:33 pm:
> On Wed, Aug 26, 2020 at 4:53 PM Nicholas Piggin <npiggin@gmail.com> wrote:
>> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
>> Cc: linux-m68k@lists.linux-m68k.org
>> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
>
> With the below fixed:
> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
>
>> --- a/arch/m68k/include/asm/mmu_context.h
>> +++ b/arch/m68k/include/asm/mmu_context.h
>> @@ -79,19 +76,6 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
>> set_context(tsk->mm->context, next->pgd);
>> }
>>
>> -/*
>> - * After we have set current->mm to a new value, this activates
>> - * the context for the new mm so we see the new mappings.
>> - */
>> -static inline void activate_mm(struct mm_struct *active_mm,
>> - struct mm_struct *mm)
>> -{
>> - get_mmu_context(mm);
>> - set_context(mm->context, mm->pgd);
>> -}
>
> Assumed switch_mm() in [PATCH v2 01/23] is revived with the above body.

I'm not sure what you mean here. We can remove this because it's a copy
of switch_mm above, and that's what the new header defaults to if you
don't provide an active_mm.

Patch 1 should not have changed that, it should only affect the nommu
architectures (and actually didn't touch m68k because it was not using
the asm-generic/mmu_context.h header).

Thanks,
Nick