Warnings before patch:
files: ['net/core/filter.c']
Warning: net/core/filter.c:134 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:586 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1080 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1385 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1431 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1552 No description found for return value of 'sk_attach_filter'
Warning: net/core/filter.c:12113 No description found for return value of 'bpf_skb_meta_pointer'
Warning: net/core/filter.c:134 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:586 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1080 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1385 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1431 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1552 No description found for return value of 'sk_attach_filter'
Warning: net/core/filter.c:12113 No description found for return value of 'bpf_skb_meta_pointer'

Current warnings:
files: ['net/core/filter.c', 'tools/testing/selftests/bpf/prog_tests/test_dst_clear.c', 'tools/testing/selftests/bpf/progs/test_dst_clear.c']
Warning: net/core/filter.c:134 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:586 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1080 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1385 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1431 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1552 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/core/filter.c:134 No description found for return value of 'sk_filter_trim_cap'
Warning: net/core/filter.c:586 No description found for return value of 'bpf_convert_filter'
Warning: net/core/filter.c:1080 No description found for return value of 'bpf_check_classic'
Warning: net/core/filter.c:1385 No description found for return value of 'bpf_prog_create'
Warning: net/core/filter.c:1431 No description found for return value of 'bpf_prog_create_from_user'
Warning: net/core/filter.c:1552 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'

Warnings before: 14 after: 14