WARNING: externs should be avoided in .c files
#30: FILE: arch/x86/net/bpf_jit_comp.c:1415:
+u64 bpf_get_hw_counter(void);

WARNING: line length of 91 exceeds 80 columns
#41: FILE: arch/x86/net/bpf_jit_comp.c:2133:
+				/* Save RDX because RDTSC will use EDX:EAX to return u64 */

WARNING: line length of 82 exceeds 80 columns
#51: FILE: arch/x86/net/bpf_jit_comp.c:2143:
+				maybe_emit_mod(&prog, BPF_REG_0, BPF_REG_3, true);

WARNING: line length of 82 exceeds 80 columns
#52: FILE: arch/x86/net/bpf_jit_comp.c:2144:
+				EMIT2(0x09, add_2reg(0xC0, BPF_REG_0, BPF_REG_3));

WARNING: line length of 83 exceeds 80 columns
#92: FILE: arch/x86/net/bpf_jit_comp32.c:2100:
+					if (boot_cpu_has(X86_FEATURE_LFENCE_RDTSC))

total: 0 errors, 5 warnings, 0 checks, 141 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 23a1761fb7f3 ("bpf: add bpf_get_hw_counter kfunc") 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, 0 checks, 141 lines checked