CHECK: extern prototypes should be avoided in .h files
#26: FILE: tools/testing/selftests/bpf/bpf_kfuncs.h:22:
+extern int bpf_dynptr_from_skb_meta(struct __sk_buff *skb, __u64 flags,

WARNING: line length of 82 exceeds 80 columns
#27: FILE: tools/testing/selftests/bpf/bpf_kfuncs.h:23:
+				    struct bpf_dynptr *ptr__uninit) __ksym __weak;

WARNING: line length of 85 exceeds 80 columns
#46: FILE: tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c:180:
+	err = bpf_map__update_elem(result_map, &k, sizeof(k), v, sizeof(v), BPF_ANY);

WARNING: line length of 81 exceeds 80 columns
#70: FILE: tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c:347:
+		test_tuntap(skel->progs.ing_xdp, skel->progs.ing_cls_dynptr_read,

WARNING: line length of 82 exceeds 80 columns
#73: FILE: tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c:350:
+		test_tuntap(skel->progs.ing_xdp, skel->progs.ing_cls_dynptr_slice,

WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#83: FILE: tools/testing/selftests/bpf/progs/test_xdp_meta.c:1:
+#include <stdbool.h>

total: 0 errors, 5 warnings, 1 checks, 104 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 83535f117302 ("selftests/bpf: Cover read access to skb metadata via dynptr") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 5 warnings, 1 checks, 104 lines checked