linux-kernel - Re: [PATCH] arch: xtensa: include: asm: compiling issue, need cmpxchg64() defined.

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Message-ID: <CAMo8BfKmZjH5ysA=d9xpDAR8kb_WoXFinBQ9nMMGRLmnpjQYcA@mail.gmail.com>
Date:	Mon, 27 May 2013 20:19:53 +0400
From:	Max Filippov <jcmvbkbc@...il.com>
To:	Chen Gang <gang.chen@...anux.com>
Cc:	chris@...kel.net, linux-xtensa@...ux-xtensa.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH] arch: xtensa: include: asm: compiling issue, need
 cmpxchg64() defined.

On Mon, May 27, 2013 at 3:57 PM, Chen Gang <gang.chen@...anux.com> wrote:
>
> When compiling with 'allmodconfig', some of drivers need cmpxchg64(),
> xtensa does not supply 64-bit implementation for 'xchg', so use the
> 'generic' implementation.
>
> e.g. (for next-20130527 tree):
>   drivers/block/blockconsole.c:164:2: error: implicit declaration of function ‘cmpxchg64’ [-Werror=implicit-function-declaration]
>
> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> ---
>  arch/xtensa/include/asm/cmpxchg.h |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)

Taken to the xtensa-fixes tree. Thanks.

-- Max
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