tree: https://android.googlesource.com/kernel/common android-4.4-p head: 1c23a26139e11ca31b16f6e15d41282e9421d717 commit: 947341f3907b8d0827cc2aa3b9e53de776cb402e [5/9] BACKPORT: xfrm/compat: Add 64=>32-bit messages translator config: x86_64-randconfig-a004-20210818 (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.4-p git checkout 947341f3907b8d0827cc2aa3b9e53de776cb402e # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/compat.h:8:0, from include/linux/compat.h:19, from net/xfrm/xfrm_compat.c:7: include/linux/sched.h:1211:1: warning: type qualifiers ignored on function return type [-Wignored-qualifiers] const struct sched_group_energy * const(*sched_domain_energy_f)(int cpu); ^~~~~ struct nlattr *__nla_reserve_64bit(struct sk_buff *skb, int attrtype, ^~~~~~~~~~~~~~~~~~~ vim +/__nla_reserve_64bit +126 net/xfrm/xfrm_compat.c 125 127 int attrlen, int padattr) 128 { 129 nla_align_64bit(skb, padattr); 130 131 return __nla_reserve(skb, attrtype, attrlen); 132 } 133 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org