WARNING: storage class 'static' should be located before type '__bpf_kfunc'
#59: FILE: net/mptcp/bpf.c:59:
+__bpf_kfunc static int

WARNING: Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked
#76: FILE: net/mptcp/bpf.c:76:
+	    !spin_is_locked(&sk->sk_lock.slock))

WARNING: storage class 'static' should be located before type '__bpf_kfunc'
#83: FILE: net/mptcp/bpf.c:83:
+__bpf_kfunc static struct mptcp_subflow_context *

WARNING: storage class 'static' should be located before type '__bpf_kfunc'
#95: FILE: net/mptcp/bpf.c:95:
+__bpf_kfunc static void

total: 0 errors, 4 warnings, 0 checks, 69 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 a748159a14fe ("bpf: Add mptcp_subflow bpf_iter") 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, 4 warnings, 0 checks, 69 lines checked