Hi, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/mohammad-athari-ismail-intel-com... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git d310ec03a34e92a77302edb804f7d68ee4f01ba0 config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/e50ee25914bd48b315d2d16e236ac23e6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review mohammad-athari-ismail-intel-com/net-stmmac-support-FPE-link-partner-hand-shaking-procedure/20210310-120756 git checkout e50ee25914bd48b315d2d16e236ac23e63d2842b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 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 include/linux/err.h:5, from include/linux/clk.h:12, from drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:17: include/linux/scatterlist.h: In function 'sg_set_buf': arch/m68k/include/asm/page_mm.h:174:49: warning: ordered comparison of pointer with null pointer [-Wextra] 174 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:137:2: note: in expansion of macro 'BUG_ON' 137 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:137:10: note: in expansion of macro 'virt_addr_valid' 137 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ drivers/net/ethernet/stmicro/stmmac/stmmac_main.c: At top level: 925 | void stmmac_fpe_link_state_handle(struct stmmac_priv *priv, bool is_up) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4167 | void stmmac_fpe_event_status(struct stmmac_priv *priv, int status) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/stmmac_fpe_link_state_handle +925 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c 924 926 { 927 struct stmmac_fpe_cfg *fpe_cfg = &priv->plat->fpe_cfg; 928 enum stmmac_fpe_state *lo_state = &fpe_cfg->lo_fpe_state; 929 enum stmmac_fpe_state *lp_state = &fpe_cfg->lp_fpe_state; 930 bool *hs_enable = &fpe_cfg->hs_enable; 931 932 if (is_up && *hs_enable) { 933 stmmac_fpe_send_mpacket(priv, priv->ioaddr, MPACKET_VERIFY); 934 } else { 935 *lo_state = FPE_EVENT_UNKNOWN; 936 *lp_state = FPE_EVENT_UNKNOWN; 937 } 938 } 939 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org