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Date:   Fri, 20 Jul 2018 12:03:54 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Jiri Olsa <jolsa@kernel.org>
Cc:     lkml <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        David Ahern <dsahern@gmail.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH 4/4] perf tools: Move syscall_64.tbl check into
 check-headers.sh
Message-ID: <20180720150354.GC4329@kernel.org>
References: <20180720110036.32251-1-jolsa@kernel.org>
 <20180720110036.32251-4-jolsa@kernel.org>
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Em Fri, Jul 20, 2018 at 01:00:36PM +0200, Jiri Olsa escreveu:
> Probably leftover from the time we introducd the check-headers.sh script.

So, with your patch:

[acme@jouet perf]$ git diff
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index f0b1709a5ffb..cfc1b0949bb1 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -343,6 +343,7 @@
 332    common  statx                   __x64_sys_statx
 333    common  io_pgetevents           __x64_sys_io_pgetevents
 334    common  rseq                    __x64_sys_rseq
+335    common  krava                   __x64_sys_krava
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact
[acme@jouet perf]$


It doesn't warn about that new cool syscall, without your patch:

Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'

Can you check this?

- Arnaldo
 
> Link: http://lkml.kernel.org/n/tip-oh56ckqztoc07we7mtdphu7r@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> ---
>  tools/perf/arch/x86/Makefile | 3 ---
>  tools/perf/check-headers.sh  | 3 +++
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
> index 1a38e78117ce..8cc6642fce7a 100644
> --- a/tools/perf/arch/x86/Makefile
> +++ b/tools/perf/arch/x86/Makefile
> @@ -19,9 +19,6 @@ systbl := $(sys)/syscalltbl.sh
>  _dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
>  
>  $(header): $(sys)/syscall_64.tbl $(systbl)
> -	@(test -d ../../kernel -a -d ../../tools -a -d ../perf && ( \
> -        (diff -B arch/x86/entry/syscalls/syscall_64.tbl ../../arch/x86/entry/syscalls/syscall_64.tbl >/dev/null) \
> -        || echo "Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'" >&2 )) || true
>  	$(Q)$(SHELL) '$(systbl)' $(sys)/syscall_64.tbl 'x86_64' > $@
>  
>  clean::
> diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
> index 73e723675c5f..2c10e46d98e9 100755
> --- a/tools/perf/check-headers.sh
> +++ b/tools/perf/check-headers.sh
> @@ -93,3 +93,6 @@ check arch/x86/lib/memcpy_64.S        '-I "^EXPORT_SYMBOL" -I "^#include <asm/ex
>  check arch/x86/lib/memset_64.S        '-I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>"'
>  check include/uapi/asm-generic/mman.h '-I "^#include <\(uapi/\)*asm-generic/mman-common.h>"'
>  check include/uapi/linux/mman.h       '-I "^#include <\(uapi/\)*asm/mman.h>"'
> +
> +# diff non-symmetric files
> +check_2 arch/x86/entry/syscalls/syscall_64.tbl ../../arch/x86/entry/syscalls/syscall_64.tbl
> -- 
> 2.17.1