linux-kernel - Re: [PATCH 2/2] Fix a build warning in scripts/mod/file2alias.c

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Date:	Wed, 03 Jul 2013 14:31:46 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Daniel Tang <dt.tangr@...il.com>
Cc:	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
	trivial@...nel.org
Subject: Re: [PATCH 2/2] Fix a build warning in scripts/mod/file2alias.c

On 9.6.2013 04:33, Daniel Tang wrote:
> On some systems, __used is already defined in sys/cdefs.h and causes
> a build warning:
> 
> scripts/mod/file2alias.c:85:1: warning: "__used" redefined
> In file included from /usr/include/stdio.h:64,
>                  from scripts/mod/modpost.h:1,
> 		                  from scripts/mod/file2alias.c:13:
> 				  /usr/include/sys/cdefs.h:146:1: warning: this is the location of the previous definition
> 
> This adds an extra check before defining the __used macro to see if
> the macro was already defined elsewhere.
> 
> Signed-off-by: Daniel Tang <dt.tangr@...il.com>

Applied to kbuild.git#kbuild.

Michal

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