linux-kernel - Re: [PATCH] perf/powerpc: Fix build-test failure

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Date:   Wed, 7 Sep 2016 21:07:54 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:     acme@...nel.org
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH] perf/powerpc: Fix build-test failure

Hi Arnaldo,

Can you please pick up this.

-Ravi

On Wednesday 31 August 2016 01:33 PM, Ravi Bangoria wrote:
> 'make -C tools/perf build-test' is failing with below log for poewrpc.
>
>   In file included from /tmp/tmp.3eEwmGlYaF/perf-4.8.0-rc4/tools/perf/perf.h:15:0,
>                    from util/cpumap.h:8,
>                    from util/env.c:1:
>   /tmp/tmp.3eEwmGlYaF/perf-4.8.0-rc4/tools/perf/perf-sys.h:23:56:
>   fatal error: ../../arch/powerpc/include/uapi/asm/unistd.h: No such file or directory
>   compilation terminated.
>
> I bisected it and found it's failing from commit ad430729ae00 ("Remove:
> kernel unistd*h files from perf's MANIFEST, not used").
>
> Header file '../../arch/powerpc/include/uapi/asm/unistd.h' is included
> only for powerpc in tools/perf/perf-sys.h.
>
> By looking closly at commit history, I found little weird thing:
>
> Commit f2d9cae9ea9e ("perf powerpc: Use uapi/unistd.h to fix build
> error") replaced 'asm/unistd.h' with 'uapi/asm/unistd.h'
>
> Commit d2709c7ce4c5 ("perf: Make perf build for x86 with UAPI
> disintegration applied") removes all arch specific 'uapi/asm/unistd.h'
> for all archs and adds generic <asm/unistd.h>.
>
> Commit f0b9abfb0446 ("Merge branch 'linus' into perf/core") again
> includes 'uapi/asm/unistd.h' for powerpc. Don't know how exactly this
> happened as this change is not part of commit also.
>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
> ---
>  tools/perf/perf-sys.h | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
> index 7ed72a4..e4b717e 100644
> --- a/tools/perf/perf-sys.h
> +++ b/tools/perf/perf-sys.h
> @@ -20,7 +20,6 @@
>  #endif
>
>  #ifdef __powerpc__
> -#include "../../arch/powerpc/include/uapi/asm/unistd.h"
>  #define CPUINFO_PROC	{"cpu"}
>  #endif
>