[PATCH V2] selftests/powerpc/pmu: Fix unsigned function returning negative constant

[Haowen Bai]

The function __perf_reg_mask has an unsigned return type, but returns a
negative constant to indicate an error condition. So we change unsigned
to int.

Fixes: 5f6c3061af7c ("selftests/powerpc/pmu: Add utility functions to post
process the mmap buffer")

Signed-off-by: Haowen Bai <baihaowen at meizu.com>
---
V1->V2: add fix tag.

 tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
index fca054bbc094..c01a31d5f4ee 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
@@ -274,7 +274,7 @@ u64 *get_intr_regs(struct event *event, void *sample_buff)
 	return intr_regs;
 }
 
-static const unsigned int __perf_reg_mask(const char *register_name)
+static const int __perf_reg_mask(const char *register_name)
 {
 	if (!strcmp(register_name, "R0"))
 		return 0;
-- 
2.7.4