linux-kernel - Re: [PATCH v2 3/4] s390: drop CONFIG_VIRT_TO

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Date:   Fri, 3 May 2019 16:26:17 +0200
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Martin Schwidefsky <schwidefsky@...ibm.com>,
        clang-built-linux@...glegroups.com,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        linux-s390@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Philipp Rudo <prudo@...ux.vnet.ibm.com>,
        Tony Krowiak <akrowiak@...ux.ibm.com>,
        Ursula Braun <ubraun@...ux.ibm.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] s390: drop CONFIG_VIRT_TO_BUS

On Mon, Apr 15, 2019 at 10:35:53AM +0200, Arnd Bergmann wrote:
> VIRT_TO_BUS is only used for legacy device PCI and ISA drivers using
> virt_to_bus() instead of the streaming DMA mapping API, and the
> remaining drivers generally don't work on 64-bit architectures.
> 
> Two of these drivers also cause a build warning on s390, so instead
> of trying to fix that, let's just disable the option as we do on
> most architectures now.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  arch/s390/Kconfig | 1 -
>  1 file changed, 1 deletion(-)

Applied, thanks.