Hi.
I hit this perf build error with next-20160208 with GCC 4.6.
CC tests/bp_signal.o
tests/bp_signal.c: In function ‘__event’:
tests/bp_signal.c:106:47: error: declaration of ‘signal’ shadows a
global declaration [-Werror=shadow]
tests/bp_signal.c: In function ‘bp_event’:
tests/bp_signal.c:144:37: error: declaration of ‘signal’ shadows a
global declaration [-Werror=shadow]
tests/bp_signal.c: In function ‘wp_event’:
tests/bp_signal.c:149:37: error: declaration of ‘signal’ shadows a
global declaration [-Werror=shadow]
The build error is introduced with "perf test: Check environment
before start real BPF test".
commit 6a7d550e8b2eeb380ab85d9bc53571123b98345b
Author: Wang Nan <wangnan0@xxxxxxxxxx>
Date: Mon Jan 25 09:55:53 2016 +0000
perf test: Check environment before start real BPF test
Copying perf to old kernel system results:
# perf test bpf
37: Test BPF filter :
37.1: Test basic BPF filtering : FAILED!
37.2: Test BPF prologue generation : Skip
However, in case when kernel doesn't support a test case it should
return 'Skip', 'FAILED!' should be reserved for kernel tests for when
the kernel supports a feature that then fails to work as advertised.
This patch checks environment before real testcase.
Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Suggested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: He Kuang <hekuang@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Li Zefan <lizefan@xxxxxxxxxx>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: pi3orama@xxxxxxx
Link: http://lkml.kernel.org/r/1453715801-7732-7-git-send-email-wangnan0@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cheers,
Vinson
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