WARNING: line length of 83 exceeds 80 columns
#91: FILE: include/net/smc.h:130:
+	 * We can control whether to respond SMC options by returning varios value.

WARNING: line length of 90 exceeds 80 columns
#94: FILE: include/net/smc.h:133:
+	int (*set_option_cond)(const struct tcp_sock *tp, struct inet_request_sock *ireq);

CHECK: Macro argument 'func' may be better as '(func)' to avoid precedence issues
#98: FILE: include/net/smc.h:137:
+#define smc_call_retops(init_val, sk, func, ...) ({	\
+	typeof(init_val) __ret = (init_val);		\
+	struct smc_ops *ops;				\
+	rcu_read_lock();				\
+	ops = READ_ONCE(sock_net(sk)->smc.ops);		\
+	if (ops && ops->func)				\
+		__ret = ops->func(__VA_ARGS__);		\
+	rcu_read_unlock();				\
+	__ret;						\
+})

WARNING: line length of 85 exceeds 80 columns
#138: FILE: net/ipv4/tcp_output.c:770:
+			tp->syn_smc = smc_call_retops(1, &tp->inet_conn.icsk_inet.sk,

WARNING: line length of 88 exceeds 80 columns
#141: FILE: net/ipv4/tcp_output.c:773:
+			if (tp->syn_smc && *remaining >= TCPOLEN_EXP_SMC_BASE_ALIGNED) {

WARNING: line length of 86 exceeds 80 columns
#158: FILE: net/ipv4/tcp_output.c:790:
+			ireq->smc_ok = smc_call_retops(1, &tp->inet_conn.icsk_inet.sk,

WARNING: line length of 82 exceeds 80 columns
#159: FILE: net/ipv4/tcp_output.c:791:
+						       set_option_cond, tp, ireq);

WARNING: line length of 89 exceeds 80 columns
#161: FILE: net/ipv4/tcp_output.c:793:
+			if (ireq->smc_ok && *remaining >= TCPOLEN_EXP_SMC_BASE_ALIGNED) {

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#196: 
new file mode 100644

WARNING: line length of 85 exceeds 80 columns
#283: FILE: net/smc/smc_ops.h:26:
+static inline struct smc_ops *smc_ops_find_by_name(const char *name) { return NULL; }

WARNING: struct ctl_table should normally be const
#342: FILE: net/smc/smc_sysctl.c:73:
+	struct ctl_table tbl = {

total: 0 errors, 10 warnings, 1 checks, 345 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 27ae852a1e66 ("net/smc: Introduce generic hook smc_ops") 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, 10 warnings, 1 checks, 345 lines checked