Merge branch 'bpf: RLIMIT_MEMLOCK cleanups'

Yafang Shao says:

====================

We have switched to memcg-based memory accouting and thus the rlimit is
not needed any more. LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK was introduced in
libbpf for backward compatibility, so we can use it instead now.

This patchset cleanups the usage of RLIMIT_MEMLOCK in tools/bpf/,
tools/testing/selftests/bpf and samples/bpf. The file
tools/testing/selftests/bpf/bpf_rlimit.h is removed. The included header
sys/resource.h is removed from many files as it is useless in these files.

- v4: Squash patches and use customary subject prefixes. (Andrii)
- v3: Get rid of bpf_rlimit.h and fix some typos (Andrii)
- v2: Use libbpf_set_strict_mode instead. (Andrii)
- v1: https://lore.kernel.org/bpf/20220320060815.7716-2-laoar.shao@gmail.com/
====================

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/tools/testing/selftests/bpf/test_lru_map.c b/tools/testing/selftests/bpf/test_lru_map.c
index 563bbe18c172..a6aa2d121955 100644
--- a/tools/testing/selftests/bpf/test_lru_map.c
+++ b/tools/testing/selftests/bpf/test_lru_map.c
@@ -18,7 +18,6 @@
 #include <bpf/libbpf.h>
 
 #include "bpf_util.h"
-#include "bpf_rlimit.h"
 #include "../../../include/linux/filter.h"
 
 #define LOCAL_FREE_TARGET	(128)
@@ -878,6 +877,9 @@ int main(int argc, char **argv)
 	assert(nr_cpus != -1);
 	printf("nr_cpus:%d\n\n", nr_cpus);
 
+	/* Use libbpf 1.0 API mode */
+	libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
+
 	for (f = 0; f < ARRAY_SIZE(map_flags); f++) {
 		unsigned int tgt_free = (map_flags[f] & BPF_F_NO_COMMON_LRU) ?
 			PERCPU_FREE_TARGET : LOCAL_FREE_TARGET;