Re: [tip:perf/core] tools: Add err.h with ERR_PTR PTR_ERR interface

[Vinson Lee]

On Wed, Sep 16, 2015 at 12:28 AM, tip-bot for Jiri Olsa
<tipbot@xxxxxxxxx> wrote:
> Commit-ID:  01ca9fd41d6f2ad796a6b109b5253e06b6ae6dc7
> Gitweb:     http://git.kernel.org/tip/01ca9fd41d6f2ad796a6b109b5253e06b6ae6dc7
> Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
> AuthorDate: Mon, 7 Sep 2015 10:38:03 +0200
> Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> CommitDate: Tue, 15 Sep 2015 09:48:32 -0300
>
> tools: Add err.h with ERR_PTR PTR_ERR interface
>
> Adding part of the kernel's <linux/err.h> interface:
>
>   inline void * __must_check ERR_PTR(long error);
>   inline long   __must_check PTR_ERR(__force const void *ptr);
>   inline bool   __must_check IS_ERR(__force const void *ptr);
>
> It will be used to propagate error through pointers in following
> patches.
>
> Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> Reviewed-by: Raphael Beamonte <raphael.beamonte@xxxxxxxxx>
> Cc: David Ahern <dsahern@xxxxxxxxx>
> Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
> Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> Link: http://lkml.kernel.org/r/1441615087-13886-2-git-send-email-jolsa@xxxxxxxxxx
> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>


Hi.

This patch appears to have introduced a build error on CentOS 6.7 with GCC 4.4.

This build error occurs on next-20150921.

  CC       util/evlist.o
cc1: warnings being treated as errors
In file included from util/evlist.c:28:
tools/include/linux/err.h: In function âERR_PTRâ:
tools/include/linux/err.h:34: error: declaration of âerrorâ shadows a
global declaration
util/util.h:135: error: shadowed declaration is here

$ gcc --version
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Cheers,
Vinson
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