[PATCH] powerpc/64s: Mark 'dummy_copy_buffer' as used

Michael Ellerman mpe at ellerman.id.au
Wed Mar 13 15:05:04 AEDT 2019

Christophe Leroy <christophe.leroy at c-s.fr> writes:
> On 03/12/2019 08:29 PM, Mathieu Malaterre wrote:
>> In commit 07d2a628bc00 ("powerpc/64s: Avoid cpabort in context switch
>> when possible") a buffer 'dummy_copy_buffer' was introduced. gcc does
>> not see this buffer being used in the inline assembly within function
>> '__switch_to', explicitly marked this variable as being used.
>> Prefer using '__aligned' to get passed line over 80 characters warning
>> in checkpatch.
> Powerpc accepts 90 characters, use arch/powerpc/tools/checkpatch.sh
>> This remove the following warning:
>>    arch/powerpc/kernel/process.c:1156:17: error: 'dummy_copy_buffer' defined but not used [-Werror=unused-const-variable=]
> commit 2bf1071a8d50 ("powerpc/64s: Remove POWER9 DD1 support") has 
> removed the fonction using 'dummy_copy_buffer' so you should remove it 
> completely.

Yes that would be better, thanks.


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