selftests/bpf: Fix perf_buffer test
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2006310
Upstream Status: git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
Fixes for perf_buffer test.
Signed-off-by: Jiri Olsa jolsa@redhat.com
Edited by Jiri Olsa