Hi Pablo, I love your patch! Perhaps something to improve: [auto build test WARNING on nf/master] [also build test WARNING on nf-next/master v5.13-rc6 next-20210616] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Pablo-Neira-Ayuso/netfilter-nf_t... base: https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git master config: i386-randconfig-s001-20210615 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/12cfd8daf813a3f62294bdbe915c1d2cd... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Pablo-Neira-Ayuso/netfilter-nf_tables-add-last-expression/20210617-021223 git checkout 12cfd8daf813a3f62294bdbe915c1d2cd6946a30 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) net/netfilter/nft_last.c:59:46: sparse: expected restricted __be32 [usertype] value net/netfilter/nft_last.c:59:46: sparse: got restricted __be16 [usertype] vim +59 net/netfilter/nft_last.c 48 49 static int nft_last_dump(struct sk_buff *skb, const struct nft_expr *expr) 50 { 51 struct nft_last_priv *priv = nft_expr_priv(expr); 52 __be64 msecs; 53 54 if (priv->last_set) 55 msecs = nf_jiffies64_to_msecs(jiffies - priv->last_jiffies); 56 else 57 msecs = 0; 58 60 nla_put_be64(skb, NFTA_LAST_MSECS, msecs, NFTA_LAST_PAD)) 61 goto nla_put_failure; 62 63 return 0; 64 65 nla_put_failure: 66 return -1; 67 } 68 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org