linux-kernel - Re: [RFC PATCH v2 02/12] powerpc/ptrace: drop unnecessary #ifdefs CONFIG

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Message-ID: <874l49mzuv.fsf@igel.home>
Date:   Fri, 28 Jun 2019 18:36:08 +0200
From:   Andreas Schwab <schwab@...ux-m68k.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, mikey@...ling.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [RFC PATCH v2 02/12] powerpc/ptrace: drop unnecessary #ifdefs CONFIG_PPC64

On Jun 28 2019, Christophe Leroy <christophe.leroy@....fr> wrote:

> diff --git a/arch/powerpc/include/uapi/asm/ptrace.h b/arch/powerpc/include/uapi/asm/ptrace.h
> index f5f1ccc740fc..37d7befbb8dc 100644
> --- a/arch/powerpc/include/uapi/asm/ptrace.h
> +++ b/arch/powerpc/include/uapi/asm/ptrace.h
> @@ -43,12 +43,11 @@ struct pt_regs
>  	unsigned long link;
>  	unsigned long xer;
>  	unsigned long ccr;
> -#ifdef __powerpc64__
> -	unsigned long softe;		/* Soft enabled/disabled */
> -#else
> -	unsigned long mq;		/* 601 only (not used at present) */
> +	union {
> +		unsigned long softe;	/* Soft enabled/disabled */
> +		unsigned long mq;	/* 601 only (not used at present) */
>  					/* Used on APUS to hold IPL value. */
> -#endif
> +	};

Anonymous unions are a C11 feature.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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