The bpf_get_stackid() function may also return 0 on success.
Correct checks from 'val > 0' to 'val >= 0' to ensure that they cover all possible success return values.
Signed-off-by: Yuntao Wang ytcoode@gmail.com --- v1 -> v2: update commit message
tools/testing/selftests/bpf/progs/perf_event_stackmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/progs/perf_event_stackmap.c b/tools/testing/selftests/bpf/progs/perf_event_stackmap.c index b3fcb5274ee0..f793280a3238 100644 --- a/tools/testing/selftests/bpf/progs/perf_event_stackmap.c +++ b/tools/testing/selftests/bpf/progs/perf_event_stackmap.c @@ -35,10 +35,10 @@ int oncpu(void *ctx) long val;
val = bpf_get_stackid(ctx, &stackmap, 0); - if (val > 0) + if (val >= 0) stackid_kernel = 2; val = bpf_get_stackid(ctx, &stackmap, BPF_F_USER_STACK); - if (val > 0) + if (val >= 0) stackid_user = 2;
trace = bpf_map_lookup_elem(&stackdata_map, &key);