WARNING: line length of 91 exceeds 80 columns
#39: FILE: include/linux/socket.h:77:
+	void __user	*msg_control_user_tx;	/* msg_control_user in TX piggyback path */

WARNING: line length of 89 exceeds 80 columns
#41: FILE: include/linux/socket.h:79:
+	__kernel_size_t msg_controllen_user_tx; /* msg_controllen in TX piggyback path */

WARNING: line length of 90 exceeds 80 columns
#49: FILE: include/linux/socket.h:397:
+extern int put_cmsg_user_tx(struct msghdr *msg, int level, int type, int len, void *data);

CHECK: extern prototypes should be avoided in .h files
#49: FILE: include/linux/socket.h:397:
+extern int put_cmsg_user_tx(struct msghdr *msg, int level, int type, int len, void *data);

WARNING: line length of 83 exceeds 80 columns
#133: FILE: net/core/scm.c:231:
+static int __put_cmsg(struct msghdr *msg, int level, int type, int len, void *data)

WARNING: line length of 97 exceeds 80 columns
#160: FILE: net/core/scm.c:253:
+		cm = msg->msg_control_is_user ? msg->msg_control_user : msg->msg_control_user_tx;

WARNING: line length of 82 exceeds 80 columns
#198: FILE: net/core/scm.c:300:
+int put_cmsg_user_tx(struct msghdr *msg, int level, int type, int len, void *data)

total: 0 errors, 6 warnings, 1 checks, 167 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 ac070700e106 ("sock: support put_cmsg to userspace in TX path") 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, 6 warnings, 1 checks, 167 lines checked