From d719de0d2f3cbdb5890a147b90a51c5eaaef103e Mon Sep 17 00:00:00 2001 From: Yucong Sun Date: Wed, 6 Oct 2021 11:56:11 -0700 Subject: [PATCH] selftests/bpf: Fix race condition in enable_stats In parallel execution mode, this test now need to use atomic operation to avoid race condition. Signed-off-by: Yucong Sun Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211006185619.364369-7-fallentree@fb.com --- tools/testing/selftests/bpf/progs/test_enable_stats.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/progs/test_enable_stats.c b/tools/testing/selftests/bpf/progs/test_enable_stats.c index 01a002a..1705097 100644 --- a/tools/testing/selftests/bpf/progs/test_enable_stats.c +++ b/tools/testing/selftests/bpf/progs/test_enable_stats.c @@ -13,6 +13,6 @@ __u64 count = 0; SEC("raw_tracepoint/sys_enter") int test_enable_stats(void *ctx) { - count += 1; + __sync_fetch_and_add(&count, 1); return 0; } -- 2.7.4