include/linux/tcp.h:61: warning: No description found for return value of 'skb_tcp_all_headers'
include/linux/tcp.h:76: warning: No description found for return value of 'skb_inner_tcp_all_headers'
net/ipv4/tcp_output.c:3714: warning: No description found for return value of 'tcp_make_synack'
include/linux/tcp.h:61: warning: No description found for return value of 'skb_tcp_all_headers'
include/linux/tcp.h:76: warning: No description found for return value of 'skb_inner_tcp_all_headers'
net/ipv4/tcp_output.c:3717: warning: No description found for return value of 'tcp_make_synack'