tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.4 head: 6d5e8cb22c2a82dde051b99b44498bbc350c7130 commit: ae588f850c1712c8560dceb311a63f993aaead90 [3/11] CHROMIUM: drm/evdi: Parse usb path in evdi's add sysfs attribute config: arc-allyesconfig (attached as .config) compiler: arceb-elf-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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-4.4 git checkout ae588f850c1712c8560dceb311a63f993aaead90 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): cc1: warning: include/drm: No such file or directory [-Wmissing-include-dirs] In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/debug_locks.h:6, from include/linux/lockdep.h:23, from include/linux/spinlock_types.h:18, from include/linux/mutex.h:15, from include/linux/kernfs.h:13, from include/linux/sysfs.h:15, from include/linux/kobject.h:21, from include/linux/cdev.h:4, from include/drm/drmP.h:36, from drivers/gpu/drm/evdi/evdi_drv.c:10: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:123:27: note: in definition of macro 'WARN_ON_ONCE' 123 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/uapi/linux/stddef.h:1, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/list.h:4, from include/linux/agp_backend.h:33, from include/drm/drmP.h:35, from drivers/gpu/drm/evdi/evdi_drv.c:10: include/linux/highmem.h: In function 'kmap_atomic_idx_push': include/linux/highmem.h:97:13: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare] 97 | BUG_ON(idx >= KM_TYPE_NR); | ^~ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/highmem.h:97:2: note: in expansion of macro 'BUG_ON' 97 | BUG_ON(idx >= KM_TYPE_NR); | ^~~~~~ In file included from include/linux/fb.h:4, from include/drm/drm_crtc.h:31, from include/drm/drmP.h:70, from drivers/gpu/drm/evdi/evdi_drv.c:10: include/drm/drmP.h: In function 'drm_can_sleep': include/linux/kgdb.h:320:42: warning: comparison of integer expressions of different signedness: '__u32' {aka 'unsigned int'} and 'int' [-Wsign-compare] 320 | (irqs_disabled() && (smp_processor_id() == atomic_read(&kgdb_active))) | ^~ include/drm/drmP.h:1249:21: note: in expansion of macro 'in_dbg_master' 1249 | if (in_atomic() || in_dbg_master() || irqs_disabled()) | ^~~~~~~~~~~~~ In file included from drivers/gpu/drm/evdi/evdi_drv.h:23, from drivers/gpu/drm/evdi/evdi_drv.c:16: include/linux/reservation.h: In function 'reservation_object_fini': include/linux/reservation.h:122:17: warning: comparison of integer expressions of different signedness: 'int' and 'u32' {aka 'unsigned int'} [-Wsign-compare] 122 | for (i = 0; i < fobj->shared_count; ++i) | ^ drivers/gpu/drm/evdi/evdi_drv.c: In function 'evdi_remove_all': drivers/gpu/drm/evdi/evdi_drv.c:159:16: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 159 | for (i = 0; i < evdi_context.dev_count; ++i) { | ^ drivers/gpu/drm/evdi/evdi_drv.c: In function 'add_device_with_usb_path': 202 | char *itf_token = NULL; | ^~~~~~~~~ drivers/gpu/drm/evdi/evdi_drv.c: In function 'evdi_init': drivers/gpu/drm/evdi/evdi_drv.c:315:17: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 315 | for (i = 0; i < ARRAY_SIZE(evdi_device_attributes); i++) { | ^ drivers/gpu/drm/evdi/evdi_drv.c: In function 'evdi_exit': drivers/gpu/drm/evdi/evdi_drv.c:332:17: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 332 | for (i = 0; i < ARRAY_SIZE(evdi_device_attributes); i++) { | ^ vim +/itf_token +202 drivers/gpu/drm/evdi/evdi_drv.c 194 195 static ssize_t add_device_with_usb_path(__always_unused struct device *dev, 196 const char *buf, size_t count) 197 { 198 char *usb_path = kstrdup(buf, GFP_KERNEL); 199 char *temp_path = usb_path; 200 char *bus_token = NULL; 201 char *usb_token = NULL; 203 204 temp_path = strnstr(temp_path, "usb:", count); 205 if (!temp_path) 206 goto err_parse_usb_path; 207 208 209 temp_path = strim(temp_path); 210 211 bus_token = strsep(&temp_path, ":"); 212 if (!bus_token) 213 goto err_parse_usb_path; 214 215 usb_token = strsep(&temp_path, ":"); 216 if (!usb_token) 217 goto err_parse_usb_path; 218 219 itf_token = strsep(&temp_path, ":"); 220 221 222 EVDI_INFO("Attaching to %s:%s\n", bus_token, usb_token); 223 return count; 224 225 err_parse_usb_path: 226 EVDI_ERROR("Unable to parse usb path: %s", buf); 227 kfree(usb_path); 228 return -EINVAL; 229 } 230 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org