Hi Lorenzo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on balbi-usb/testing/next] [also build test WARNING on usb/usb-testing peter.chen-usb/ci-for-usb-next v5.9-rc1 next-20200818] [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/Lorenzo-Colitti/usb-gadget-f_ncm... base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next 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 # 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/kernel.h:11, from drivers/usb/gadget/function/f_ncm.c:14: include/linux/scatterlist.h: In function 'sg_set_buf': arch/m68k/include/asm/page_mm.h:169:49: warning: ordered comparison of pointer with null pointer [-Wextra] 169 | #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:143:2: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:143:10: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ drivers/usb/gadget/function/f_ncm.c: In function 'ncm_bitrate': 89 | return 4000000000; | ^~~~~~ # https://github.com/0day-ci/linux/commit/e5b632f5aecf9c4d7d1bd3e17cf3ff699... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Lorenzo-Colitti/usb-gadget-f_ncm-fix-ncm_bitrate-for-SuperSpeed-and-above/20200819-010231 git checkout e5b632f5aecf9c4d7d1bd3e17cf3ff699c1c3201 vim +89 drivers/usb/gadget/function/f_ncm.c 84 85 /* peak (theoretical) bulk transfer rate in bits-per-second */ 86 static inline unsigned ncm_bitrate(struct usb_gadget *g) 87 { 88 if (gadget_is_superspeed(g) && g->speed >= USB_SPEED_SUPER) 90 else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 91 return 13 * 512 * 8 * 1000 * 8; 92 else 93 return 19 * 64 * 1 * 1000 * 8; 94 } 95 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org