CHECK: Alignment should match open parenthesis
#240: FILE: tools/testing/selftests/net/lib/xdp_native.bpf.c:333:
+static int xdp_adjst_head_shrnk_data(struct xdp_md *ctx, const __u32 hdr_len,
+				const __u32 size)

WARNING: line length of 83 exceeds 80 columns
#249: FILE: tools/testing/selftests/net/lib/xdp_native.bpf.c:342:
+	/* Update the length information in the IP and UDP headers before adjusting

WARNING: line length of 84 exceeds 80 columns
#250: FILE: tools/testing/selftests/net/lib/xdp_native.bpf.c:343:
+	 * the headroom. This simplifies accessing the relevant fields in the IP and

WARNING: line length of 81 exceeds 80 columns
#251: FILE: tools/testing/selftests/net/lib/xdp_native.bpf.c:344:
+	 * UDP headers for fragmented packets. Any failure beyond this point will

CHECK: Alignment should match open parenthesis
#276: FILE: tools/testing/selftests/net/lib/xdp_native.bpf.c:369:
+static int xdp_adjst_head_grow_data(struct xdp_md *ctx, const __u32 hdr_len,
+			       const __u32 size)

CHECK: Blank lines aren't necessary before a close brace '}'
#326: FILE: tools/testing/selftests/net/lib/xdp_native.bpf.c:419:
+
+}

total: 0 errors, 3 warnings, 3 checks, 350 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 5da4f36bb710 ("selftests: drv-net: Test head-adjustment support") 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, 3 warnings, 3 checks, 350 lines checked