linux-kernel - Re: [PATCH v2] powerpc/32: sstep: Move variable `rc` within CONFIG

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Message-ID: <CA+7wUswq0nDfo7d7F_+v+bMXZUSr0ZQ7QbOTdxmLGp4_SK7xBw@mail.gmail.com>
Date:   Thu, 23 May 2019 13:49:41 +0200
From:   Mathieu Malaterre <malat@...ian.org>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] powerpc/32: sstep: Move variable `rc` within
 CONFIG_PPC64 sentinels

ping ?

On Tue, Mar 12, 2019 at 10:23 PM Mathieu Malaterre <malat@...ian.org> wrote:
>
> Fix warnings treated as errors with W=1:
>
>   arch/powerpc/lib/sstep.c:1172:31: error: variable 'rc' set but not used [-Werror=unused-but-set-variable]
>
> Suggested-by: Christophe Leroy <christophe.leroy@....fr>
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>
> ---
> v2: as suggested prefer CONFIG_PPC64 sentinel instead of unused keyword
>
>  arch/powerpc/lib/sstep.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
> index 3d33fb509ef4..9996dc7a0b46 100644
> --- a/arch/powerpc/lib/sstep.c
> +++ b/arch/powerpc/lib/sstep.c
> @@ -1169,7 +1169,10 @@ static nokprobe_inline int trap_compare(long v1, long v2)
>  int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
>                   unsigned int instr)
>  {
> -       unsigned int opcode, ra, rb, rc, rd, spr, u;
> +       unsigned int opcode, ra, rb, rd, spr, u;
> +#ifdef CONFIG_PPC64
> +       unsigned int rc;
> +#endif
>         unsigned long int imm;
>         unsigned long int val, val2;
>         unsigned int mb, me, sh;
> @@ -1292,7 +1295,9 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
>         rd = (instr >> 21) & 0x1f;
>         ra = (instr >> 16) & 0x1f;
>         rb = (instr >> 11) & 0x1f;
> +#ifdef CONFIG_PPC64
>         rc = (instr >> 6) & 0x1f;
> +#endif
>
>         switch (opcode) {
>  #ifdef __powerpc64__
> --
> 2.20.1
>