WARNING: memory barrier without comment
#121: FILE: drivers/net/veth.c:400:
+		smp_mb__after_atomic();

total: 0 errors, 1 warnings, 0 checks, 102 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 542f1a516429 ("veth: apply qdisc backpressure on full ptr_ring to reduce TX drops") 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, 102 lines checked