Warnings before patch:
files: ['net/core/filter.c', 'net/ipv4/tcp.c', 'net/ipv4/tcp_bbr.c', 'net/ipv4/tcp_bic.c', 'net/ipv4/tcp_cdg.c', 'net/ipv4/tcp_cubic.c', 'net/ipv4/tcp_dctcp.c', 'net/ipv4/tcp_input.c', 'net/ipv4/tcp_metrics.c', 'net/ipv4/tcp_nv.c', 'net/ipv4/tcp_output.c', 'net/ipv4/tcp_vegas.c', 'net/ipv4/tcp_westwood.c', 'net/ipv4/tcp_yeah.c']
Warning: net/core/filter.c:133 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:582 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1076 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1381 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1427 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1548 No description found for return value of 'sk_attach_filter'
Warning: net/core/filter.c:12117 No description found for return value of 'bpf_skb_meta_pointer'
Warning: net/ipv4/tcp.c:817 No description found for return value of 'tcp_splice_read'
Warning: net/ipv4/tcp_cdg.c:103 No description found for return value of 'nexp_u32'
Warning: net/ipv4/tcp_input.c:5210 No description found for return value of 'tcp_try_coalesce'
Warning: net/ipv4/tcp_output.c:3932 No description found for return value of 'tcp_make_synack'
Warning: net/core/filter.c:133 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:582 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1076 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1381 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1427 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1548 No description found for return value of 'sk_attach_filter'
Warning: net/core/filter.c:12117 No description found for return value of 'bpf_skb_meta_pointer'
Warning: net/ipv4/tcp.c:817 No description found for return value of 'tcp_splice_read'
Warning: net/ipv4/tcp_cdg.c:103 No description found for return value of 'nexp_u32'
Warning: net/ipv4/tcp_input.c:5210 No description found for return value of 'tcp_try_coalesce'
Warning: net/ipv4/tcp_output.c:3932 No description found for return value of 'tcp_make_synack'

Current warnings:
files: ['net/core/filter.c', 'net/ipv4/tcp.c', 'net/ipv4/tcp_bbr.c', 'net/ipv4/tcp_bic.c', 'net/ipv4/tcp_cdg.c', 'net/ipv4/tcp_cubic.c', 'net/ipv4/tcp_dctcp.c', 'net/ipv4/tcp_input.c', 'net/ipv4/tcp_metrics.c', 'net/ipv4/tcp_nv.c', 'net/ipv4/tcp_output.c', 'net/ipv4/tcp_vegas.c', 'net/ipv4/tcp_westwood.c', 'net/ipv4/tcp_yeah.c']
Warning: net/core/filter.c:133 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:582 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1076 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1381 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1427 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1548 No description found for return value of 'sk_attach_filter'
Warning: net/core/filter.c:12117 No description found for return value of 'bpf_skb_meta_pointer'
Warning: net/ipv4/tcp.c:817 No description found for return value of 'tcp_splice_read'
Warning: net/ipv4/tcp_cdg.c:103 No description found for return value of 'nexp_u32'
Warning: net/ipv4/tcp_input.c:5210 No description found for return value of 'tcp_try_coalesce'
Warning: net/ipv4/tcp_output.c:3932 No description found for return value of 'tcp_make_synack'
Warning: net/core/filter.c:133 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:582 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1076 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1381 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1427 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1548 No description found for return value of 'sk_attach_filter'
Warning: net/core/filter.c:12117 No description found for return value of 'bpf_skb_meta_pointer'
Warning: net/ipv4/tcp.c:817 No description found for return value of 'tcp_splice_read'
Warning: net/ipv4/tcp_cdg.c:103 No description found for return value of 'nexp_u32'
Warning: net/ipv4/tcp_input.c:5210 No description found for return value of 'tcp_try_coalesce'
Warning: net/ipv4/tcp_output.c:3932 No description found for return value of 'tcp_make_synack'

Warnings before: 22 after: 22