WARNING: line length of 90 exceeds 80 columns
#48: FILE: include/linux/socket.h:395:
+extern int put_cmsg_notrunc(struct msghdr *msg, int level, int type, int len, void *data);

CHECK: extern prototypes should be avoided in .h files
#48: FILE: include/linux/socket.h:395:
+extern int put_cmsg_notrunc(struct msghdr *msg, int level, int type, int len, void *data);

WARNING: line length of 82 exceeds 80 columns
#60: FILE: net/core/scm.c:285:
+int put_cmsg_notrunc(struct msghdr *msg, int level, int type, int len, void *data)

total: 0 errors, 2 warnings, 1 checks, 62 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 cb8ba97d53f7 ("tcp: devmem: don't write truncated dmabuf CMSGs to userspace") 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, 2 warnings, 1 checks, 62 lines checked