From: He Kuang <hekuang@huawei.com>
Date: Mon, 11 May 2015 12:28:35 +0000 (+0000)
Subject: perf tests: Fix to get negative exit codes
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~210^2~44^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=189c466f77d421aef5c196454ab2e9517af7abc9;p=pandora-kernel.git

perf tests: Fix to get negative exit codes

WEXITSTATUS consists of the least significant 8 bits of the status
argument, so we should convert the value to signed char if we have valid
negative exit codes. And the return value of test->func() contains
negative values:

  enum {
          TEST_OK   =  0,
          TEST_FAIL = -1,
          TEST_SKIP = -2,
  };

Before this patch:

  $ perf test -v 1
  ...
  test child finished with 254
  ---- end ----
  vmlinux symtab matches kallsyms: FAILED!

After this patch:

  $ perf test -v 1
  ...
  test child finished with -2
  ---- end ----
  vmlinux symtab matches kallsyms: Skip

Signed-off-by: He Kuang <hekuang@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1431347316-30401-1-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

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