Re: [PATCH 14/19] powerpc/altivec: Add missing prototypes for altivec

[LEROY Christophe]

Mathieu Malaterre <malat@xxxxxxxxxx> a ÃcritÂ:

> Christophe,
>
> On Sat, Mar 24, 2018 at 9:10 PM, LEROY Christophe
> <christophe.leroy@xxxxxx> wrote:
> > Mathieu Malaterre <malat@xxxxxxxxxx> a Ãcrit :
> >
> >
> > > On Fri, Mar 23, 2018 at 1:19 PM, christophe leroy
> > > <christophe.leroy@xxxxxx> wrote:
> > > > Le 22/03/2018 Ã 21:20, Mathieu Malaterre a Ãcrit :
> > > > > Some functions prototypes were missing for the non-altivec code. Add the
> > > > > missing prototypes directly in xor_vmx, fix warnings treated as errors
> > > > > with
> > > > > W=1:
> > > > >
> > > > >    arch/powerpc/lib/xor_vmx_glue.c:18:6: error: no previous prototype
> > > > > for
> > > > > âxor_altivec_2â [-Werror=missing-prototypes]
> > > > >    arch/powerpc/lib/xor_vmx_glue.c:29:6: error: no previous prototype
> > > > > for
> > > > > âxor_altivec_3â [-Werror=missing-prototypes]
> > > > >    arch/powerpc/lib/xor_vmx_glue.c:40:6: error: no previous prototype
> > > > > for
> > > > > âxor_altivec_4â [-Werror=missing-prototypes]
> > > > >    arch/powerpc/lib/xor_vmx_glue.c:52:6: error: no previous prototype
> > > > > for
> > > > > âxor_altivec_5â [-Werror=missing-prototypes]
> > > > >
> > > > > Signed-off-by: Mathieu Malaterre <malat@xxxxxxxxxx>
> > > > > ---
> > > > >   arch/powerpc/lib/xor_vmx.h | 14 ++++++++++++++
> > > > >   1 file changed, 14 insertions(+)
> > > > >
> > > > > diff --git a/arch/powerpc/lib/xor_vmx.h b/arch/powerpc/lib/xor_vmx.h
> > > > > index 5c2b0839b179..2173e3c84151 100644
> > > > > --- a/arch/powerpc/lib/xor_vmx.h
> > > > > +++ b/arch/powerpc/lib/xor_vmx.h
> > > > > @@ -19,3 +19,17 @@ void __xor_altivec_4(unsigned long bytes, unsigned
> > > > > long
> > > > > *v1_in,
> > > > >   void __xor_altivec_5(unsigned long bytes, unsigned long *v1_in,
> > > > >                              unsigned long *v2_in, unsigned long *v3_in,
> > > > >                              unsigned long *v4_in, unsigned long
> > > > > *v5_in);
> > > > > +
> > > > > +void xor_altivec_2(unsigned long bytes, unsigned long *v1_in,
> > > > > +                            unsigned long *v2_in);
> > > > > +
> > > >
> > > >
> > > >
> > > > Only used in one place, should be static instead of adding it in a .h
> > > >
> > > > Same for the other ones.
> > >
> > >
> > > $ git grep xor_altivec_2
> > > [...]
> > > arch/powerpc/lib/xor_vmx_glue.c:EXPORT_SYMBOL(xor_altivec_2);
> > >
> > > Are you sure I can change this function to static ?
> >
> >
> > Yes you are right.  But in fact those fonctions are already defined in
> > asm/xor. h
> > So you just need to add the missing #include
>
> I originally tried it, but this leads to:
>
>   CC      arch/powerpc/lib/xor_vmx_glue.o
> In file included from arch/powerpc/lib/xor_vmx_glue.c:16:0:
> ./arch/powerpc/include/asm/xor.h:39:15: error: variable
> âxor_block_altivecâ has initializer but incomplete type
>  static struct xor_block_template xor_block_altivec = {
>                ^~~~~~~~~~~~~~~~~~
> ./arch/powerpc/include/asm/xor.h:40:2: error: unknown field ânameâ
> specified in initializer
>   .name = "altivec",
>   ^
> [...]
>
> The file <asm/xor.h> (powerpc) is pretty much expected to be included
> after <include/linux/raid/xor.h>.
>
> I did not want to tweak <asm/xor.h> to test for #ifdef _XOR_H just before
>
> #ifdef _XOR_H
> static struct xor_block_template xor_block_altivec = {
> [...]
>
> since this seems like a hack to me.
>
> Is this ok to test for #ifdef _XOR_H in <arch/powerpc/include/asm/xor.h> ?

What about including linux/raid/xor.h in asm/xor.h ?

Christophe
> > Christophe
> >
> >
> > > > Christophe
> > > >
> > > >
> > > > > +void xor_altivec_3(unsigned long bytes, unsigned long *v1_in,
> > > > > +                            unsigned long *v2_in, unsigned long
> > > > > *v3_in);
> > > > > +
> > > > > +void xor_altivec_4(unsigned long bytes, unsigned long *v1_in,
> > > > > +                            unsigned long *v2_in, unsigned long *v3_in,
> > > > > +                            unsigned long *v4_in);
> > > > > +
> > > > > +void xor_altivec_5(unsigned long bytes, unsigned long *v1_in,
> > > > > +                            unsigned long *v2_in, unsigned long *v3_in,
> > > > > +                            unsigned long *v4_in, unsigned long
> > > > > *v5_in);
> > > >
> > > > ---
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