linux-kernel - Re: [PATCH v10 1/2] arch/*: Add CONFIG_ARCH_HAVE

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Date:   Wed, 16 May 2018 14:15:03 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Bart Van Assche <bart.vanassche@....com>,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        Bart Van Assche <bart.vanassche@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        "David S . Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>, Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH v10 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64

Bart Van Assche <bart.vanassche@....com> writes:

> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index c32a181a7cbb..901365d12dcd 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -149,6 +149,7 @@ config PPC
>  	select ARCH_HAS_UACCESS_FLUSHCACHE	if PPC64
>  	select ARCH_HAS_UBSAN_SANITIZE_ALL
>  	select ARCH_HAS_ZONE_DEVICE		if PPC_BOOK3S_64
> +	select ARCH_HAVE_CMPXCHG64		if PPC64
>  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
>  	select ARCH_MIGHT_HAVE_PC_PARPORT
>  	select ARCH_MIGHT_HAVE_PC_SERIO

LGTM. Thanks.

Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)

cheers