WARNING: line length of 121 exceeds 80 columns
#84: FILE: drivers/net/tun.c:415:
+		hdr_len = max(tun16_to_cpu(flags, hdr->csum_start) + tun16_to_cpu(flags, hdr->csum_offset) + 2, hdr_len);

WARNING: line length of 87 exceeds 80 columns
#130: FILE: drivers/net/tun.c:461:
+				   sinfo->gso_type, tun16_to_cpu(flags, hdr->gso_size),

WARNING: line length of 89 exceeds 80 columns
#135: FILE: drivers/net/tun.c:466:
+				       min(tun16_to_cpu(flags, hdr->hdr_len), 64), true);

total: 0 errors, 3 warnings, 0 checks, 306 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 b67566ccc039 ("tun: Decouple vnet handling") 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, 0 checks, 306 lines checked