[PATCH bpf-next] selftests/bpf: Return -1 from get_preempt_count() for unsupported architecture

[Saket Kumar Bhaskar]

Make get_preempt_count() to return -1 for unsupported
architectures instead of 0, so callers can distinguish not supported
from a valid preempt_count of 0.

Signed-off-by: Saket Kumar Bhaskar <skb99@xxxxxxxxxxxxx>
---
 tools/testing/selftests/bpf/bpf_experimental.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h
index 2cd9165c7348..6759d2ae6151 100644
--- a/tools/testing/selftests/bpf/bpf_experimental.h
+++ b/tools/testing/selftests/bpf/bpf_experimental.h
@@ -631,7 +631,7 @@ static inline int get_preempt_count(void)
 #elif defined(bpf_target_arm64)
 	return bpf_get_current_task_btf()->thread_info.preempt.count;
 #endif
-	return 0;
+	return -1;
 }
 
 /* Description
-- 
2.52.0