Check percpu map value size first and add the test case in selftest.

Change list:
- v2 -> v3:
    - use bpf_map_create API and mv test case in map_percpu_stats.c
- v1 -> v2:
    - round up map value size with 8 bytes in patch 1
    - add selftest case in patch 2

Tao Chen (2):
  bpf: Check percpu map value size first
  bpf/selftests: Check errno when percpu map value size exceeds

 kernel/bpf/arraymap.c                          |  3 +++
 kernel/bpf/hashtab.c                           |  3 +++
 .../selftests/bpf/map_tests/map_percpu_stats.c | 18 ++++++++++++++++++
 3 files changed, 24 insertions(+)

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2.43.0