linux-kernel - [PATCH] perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel

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Message-Id: <20190521030203.1447-1-vt@altlinux.org>
Date:   Tue, 21 May 2019 06:02:03 +0300
From:   Vitaly Chikunov <vt@...linux.org>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org
Cc:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Hendrik Brueckner <brueckner@...ux.ibm.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Kim Phillips <kim.phillips@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: [PATCH] perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel

When a host system has kernel headers that are newer than a compiling
kernel, mksyscalltbl fails with errors such as:

  <stdin>: In function 'main':
  <stdin>:271:44: error: '__NR_kexec_file_load' undeclared (first use in this function)
  <stdin>:271:44: note: each undeclared identifier is reported only once for each function it appears in
  <stdin>:272:46: error: '__NR_pidfd_send_signal' undeclared (first use in this function)
  <stdin>:273:43: error: '__NR_io_uring_setup' undeclared (first use in this function)
  <stdin>:274:43: error: '__NR_io_uring_enter' undeclared (first use in this function)
  <stdin>:275:46: error: '__NR_io_uring_register' undeclared (first use in this function)
  tools/perf/arch/arm64/entry/syscalls//mksyscalltbl: line 48: /tmp/create-table-xvUQdD: Permission denied

mksyscalltbl is compiled with default host includes, but run with
compiling kernel tree includes, causing some syscall numbers being
undeclared.

Signed-off-by: Vitaly Chikunov <vt@...linux.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Hendrik Brueckner <brueckner@...ux.ibm.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Kim Phillips <kim.phillips@....com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
---
 tools/perf/arch/arm64/entry/syscalls/mksyscalltbl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
index c88fd32563eb..459469b7222c 100755
--- a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
+++ b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
@@ -56,7 +56,7 @@ create_table()
 	echo "};"
 }
 
-$gcc -E -dM -x c  $input	       \
+$gcc -E -dM -x c -I $incpath/include/uapi $input \
 	|sed -ne 's/^#define __NR_//p' \
 	|sort -t' ' -k2 -nu	       \
 	|create_table
-- 
2.11.0