Warnings before patch: files: ['Documentation/networking/ip-sysctl.rst', 'Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst', 'include/net/netns/ipv4.h', 'net/ipv4/af_inet.c', 'net/ipv4/igmp.c', 'net/ipv4/sysctl_net_ipv4.c'] Warning: net/ipv4/igmp.c:1707 No description found for return value of 'ip_mc_check_igmp' Warning: net/ipv4/igmp.c:1707 No description found for return value of 'ip_mc_check_igmp' Current warnings: files: ['Documentation/networking/ip-sysctl.rst', 'Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst', 'include/net/netns/ipv4.h', 'net/ipv4/af_inet.c', 'net/ipv4/igmp.c', 'net/ipv4/sysctl_net_ipv4.c'] Warning: net/ipv4/igmp.c:1709 No description found for return value of 'ip_mc_check_igmp' Warning: net/ipv4/igmp.c:1709 No description found for return value of 'ip_mc_check_igmp' Warnings before: 2 after: 2