[tip:perf/core] perf tools: Initialize cpu set in pthread_attr_setaffinity_np feature test

From: tip-bot for Adrian Hunter
Date: Tue Mar 03 2015 - 01:26:48 EST

Commit-ID: 543d976fa2ebf5543bd07b5d487bf3a6144c0886
Gitweb: http://git.kernel.org/tip/543d976fa2ebf5543bd07b5d487bf3a6144c0886
Author: Adrian Hunter <adrian.hunter@xxxxxxxxx>
AuthorDate: Mon, 2 Mar 2015 09:59:05 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 2 Mar 2015 12:48:16 -0300

perf tools: Initialize cpu set in pthread_attr_setaffinity_np feature test

Feature tests are compiled but not executed, however it might avoid a
future uninitialized variable warning, so initialize the cpu set.

Reported-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-tip-commits@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/54F41849.1010906@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
index 2b81b72..fdada5e 100644
--- a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
+++ b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
@@ -1,5 +1,6 @@
#include <stdint.h>
#include <pthread.h>
+#include <sched.h>

int main(void)
@@ -8,7 +9,8 @@ int main(void)
cpu_set_t cs;

- /* don't care abt exact args, just the API itself in libpthread */
+ CPU_ZERO(&cs);
ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cs), &cs);

return ret;
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