WARNING: externs should be avoided in .c files
#33: FILE: samples/bpf/syscall_nrs.c:7:
+void syscall_defines(void);

total: 0 errors, 1 warnings, 0 checks, 8 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 6442a28c5ebd ("bpf: syscall_nrs: fix no previous prototype for "syscall_defines"") 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, 1 warnings, 0 checks, 8 lines checked