Warnings before patch:
files: ['net/ipv4/tcp_input.c', 'Documentation/networking/net_cachelines/tcp_sock.rst', 'net/ipv4/tcp.c', 'include/linux/tcp.h']
<parse fail>: Warning: include/linux/tcp.h:59 No description found for return value of 'skb_tcp_all_headers'
<parse fail>: Warning: include/linux/tcp.h:74 No description found for return value of 'skb_inner_tcp_all_headers'
<parse fail>: Warning: net/ipv4/tcp.c:816 No description found for return value of 'tcp_splice_read'
<parse fail>: Warning: net/ipv4/tcp_input.c:4983 No description found for return value of 'tcp_try_coalesce'
Warning: include/linux/tcp.h:59 No description found for return value of 'skb_tcp_all_headers'
Warning: include/linux/tcp.h:74 No description found for return value of 'skb_inner_tcp_all_headers'
Warning: net/ipv4/tcp.c:816 No description found for return value of 'tcp_splice_read'
Warning: net/ipv4/tcp_input.c:4983 No description found for return value of 'tcp_try_coalesce'

Current warnings:
files: ['net/ipv4/tcp_input.c', 'Documentation/networking/net_cachelines/tcp_sock.rst', 'net/ipv4/tcp.c', 'include/linux/tcp.h']
<parse fail>: Warning: include/linux/tcp.h:59 No description found for return value of 'skb_tcp_all_headers'
<parse fail>: Warning: include/linux/tcp.h:74 No description found for return value of 'skb_inner_tcp_all_headers'
<parse fail>: Warning: net/ipv4/tcp.c:816 No description found for return value of 'tcp_splice_read'
<parse fail>: Warning: net/ipv4/tcp_input.c:5001 No description found for return value of 'tcp_try_coalesce'
Warning: include/linux/tcp.h:59 No description found for return value of 'skb_tcp_all_headers'
Warning: include/linux/tcp.h:74 No description found for return value of 'skb_inner_tcp_all_headers'
Warning: net/ipv4/tcp.c:816 No description found for return value of 'tcp_splice_read'
Warning: net/ipv4/tcp_input.c:5001 No description found for return value of 'tcp_try_coalesce'

Warnings before: 4 after: 4