tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ab774587903771821b59471cc723bba6d893942 commit: d991bb1c8da842a2a0b9dc83b1005e655783f861 include/linux/compiler-gcc.h: sparse can do constant folding of __builtin_bswap*() date: 7 months ago config: i386-randconfig-s031-20211116 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d991bb1c8da842a2a0b9dc83b1005e655783f861 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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_osf.c:97:47: sparse: sparse: cast to restricted __be32 net/netfilter/nft_osf.c:97:47: sparse: expected restricted __be32 [usertype] value net/netfilter/nft_osf.c:97:47: sparse: got unsigned int [usertype] vim +97 net/netfilter/nft_osf.c b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 89 b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 90 static int nft_osf_dump(struct sk_buff *skb, const struct nft_expr *expr) b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 91 { b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 92 const struct nft_osf *priv = nft_expr_priv(expr); b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 93 a218dc82f0b5c6 Fernando Fernandez Mancera 2018-10-10 94 if (nla_put_u8(skb, NFTA_OSF_TTL, priv->ttl)) a218dc82f0b5c6 Fernando Fernandez Mancera 2018-10-10 95 goto nla_put_failure; a218dc82f0b5c6 Fernando Fernandez Mancera 2018-10-10 96 22c7652cdaa8cd Fernando Fernandez Mancera 2019-03-27 @97 if (nla_put_be32(skb, NFTA_OSF_FLAGS, ntohl(priv->flags))) 22c7652cdaa8cd Fernando Fernandez Mancera 2019-03-27 98 goto nla_put_failure; 22c7652cdaa8cd Fernando Fernandez Mancera 2019-03-27 99 b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 100 if (nft_dump_register(skb, NFTA_OSF_DREG, priv->dreg)) b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 101 goto nla_put_failure; b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 102 b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 103 return 0; b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 104 b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 105 nla_put_failure: b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 106 return -1; b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 107 } b96af92d6eaf9f Fernando Fernandez Mancera 2018-07-25 108 :::::: The code at line 97 was first introduced by commit :::::: 22c7652cdaa8cd33ce78bacceb4e826a3f795873 netfilter: nft_osf: Add version option support :::::: TO: Fernando Fernandez Mancera <ffmancera(a)riseup.net&gt; :::::: CC: Pablo Neira Ayuso <pablo(a)netfilter.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org