linux-kernel - Re: [PATCH v3 2/3] perf arm64: Generate system call table from asm/unistd.h

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Date:   Mon, 23 Jul 2018 16:01:21 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Kim Phillips <kim.phillips@....com>
Cc:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Richter <tmricht@...ux.vnet.ibm.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] perf arm64: Generate system call table from
 asm/unistd.h

Em Mon, Jul 23, 2018 at 03:59:05PM -0300, Arnaldo Carvalho de Melo escreveu:
> A quick hack is to do this instead:

I'm going with this quick hack applied so that I can pass all tests,
feel free to provide an alternative patch that makes
tools/include/uapi/asm-generic/unistd.h be used when included by
tools/arch/arm64/include/uapi/asm/unistd.h, that I haven't tried to do
and looks the right fix.

- Arnaldo
 
> diff --git a/tools/perf/arch/arm64/Makefile b/tools/perf/arch/arm64/Makefile
> index 85fdf4949db3..f013b115dc86 100644
> --- a/tools/perf/arch/arm64/Makefile
> +++ b/tools/perf/arch/arm64/Makefile
> @@ -11,7 +11,7 @@ PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
>  
>  out    := $(OUTPUT)arch/arm64/include/generated/asm
>  header := $(out)/syscalls.c
> -sysdef := $(srctree)/tools/arch/arm64/include/uapi/asm/unistd.h
> +sysdef := $(srctree)/tools/include/uapi/asm-generic/unistd.h
>  sysprf := $(srctree)/tools/perf/arch/arm64/entry/syscalls/
>  systbl := $(sysprf)/mksyscalltbl
>  
> diff --git a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
> index c21023509960..52e197317d3e 100755
> --- a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
> +++ b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
> @@ -28,6 +28,7 @@ create_table_from_c()
>  
>  	cat <<-_EoHEADER
>  		#include <stdio.h>
> +		#define __ARCH_WANT_RENAMEAT
>  		#include "$input"
>  		int main(int argc, char *argv[])
>  		{