Warnings before patch:
files: ['Documentation/networking/net_cachelines/inet_connection_sock.rst', 'include/net/inet_connection_sock.h', 'include/net/sock.h', 'net/ipv4/inet_connection_sock.c', 'net/ipv4/tcp_timer.c', 'net/mptcp/protocol.c', 'tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c', 'tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c']
Warning: include/net/sock.h:625 No description found for return value of 'sk_user_data_is_nocopy'
Warning: include/net/sock.h:644 No description found for return value of '__locked_read_sk_user_data_with_flags'
Warning: include/net/sock.h:667 No description found for return value of '__rcu_dereference_sk_user_data_with_flags'
Warning: include/net/sock.h:1722 No description found for return value of 'lock_sock_fast'
Warning: net/ipv4/inet_connection_sock.c:130 No description found for return value of 'inet_sk_get_local_port_range'
Warning: net/ipv4/inet_connection_sock.c:1195 No description found for return value of 'inet_csk_clone_lock'
Warning: net/ipv4/tcp_timer.c:105 No description found for return value of 'tcp_out_of_resources'
Warning: net/ipv4/tcp_timer.c:148 No description found for return value of 'tcp_orphan_retries'
Warning: net/ipv4/tcp_timer.c:215 No description found for return value of 'retransmits_timed_out'

Current warnings:
files: ['Documentation/networking/net_cachelines/inet_connection_sock.rst', 'include/net/inet_connection_sock.h', 'include/net/sock.h', 'net/ipv4/inet_connection_sock.c', 'net/ipv4/tcp_timer.c', 'net/mptcp/protocol.c', 'tools/testing/selftests/bpf/progs/bpf_iter_tcp4.c', 'tools/testing/selftests/bpf/progs/bpf_iter_tcp6.c']
Warning: include/net/sock.h:630 No description found for return value of 'sk_user_data_is_nocopy'
Warning: include/net/sock.h:649 No description found for return value of '__locked_read_sk_user_data_with_flags'
Warning: include/net/sock.h:672 No description found for return value of '__rcu_dereference_sk_user_data_with_flags'
Warning: include/net/sock.h:1727 No description found for return value of 'lock_sock_fast'
Warning: net/ipv4/inet_connection_sock.c:130 No description found for return value of 'inet_sk_get_local_port_range'
Warning: net/ipv4/inet_connection_sock.c:1195 No description found for return value of 'inet_csk_clone_lock'
Warning: net/ipv4/tcp_timer.c:105 No description found for return value of 'tcp_out_of_resources'
Warning: net/ipv4/tcp_timer.c:148 No description found for return value of 'tcp_orphan_retries'
Warning: net/ipv4/tcp_timer.c:215 No description found for return value of 'retransmits_timed_out'

Warnings before: 9 after: 9