Hi Rohan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-exynos/exynos-drm-next] [also build test WARNING on drm-intel/for-linux-next tegra-drm/drm/tegra/for-next drm-tip/drm-tip linus/master v5.7-rc7 next-20200529] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Rohan-Garg/drm-ioctl-Add-a-ioctl-to-set-and-get-a-label-on-GEM-objects/20200531-000134 base: https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next config: x86_64-randconfig-s021-20200531 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-243-gc100a7ab-dirty # save the attached .config to linux build tree make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/drm_gem.c:974:24: sparse: sparse: incorrect type in assignment (different modifiers) @@ expected char *label @@ got char const *label @@ >> drivers/gpu/drm/drm_gem.c:974:24: sparse: expected char *label >> drivers/gpu/drm/drm_gem.c:974:24: sparse: got char const *label >> drivers/gpu/drm/drm_gem.c:992:29: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] label @@ got void * @@ >> drivers/gpu/drm/drm_gem.c:992:29: sparse: expected unsigned long long [usertype] label >> drivers/gpu/drm/drm_gem.c:992:29: sparse: got void * >> drivers/gpu/drm/drm_gem.c:1000:28: sparse: sparse: incompatible types in comparison expression (different signedness): >> drivers/gpu/drm/drm_gem.c:1000:28: sparse: unsigned int * >> drivers/gpu/drm/drm_gem.c:1000:28: sparse: int * -- >> drivers/gpu/drm/drm_ioctl.c:636:46: sparse: sparse: incorrect type in return expression (different base types) @@ expected int @@ got char * @@ >> drivers/gpu/drm/drm_ioctl.c:636:46: sparse: expected int >> drivers/gpu/drm/drm_ioctl.c:636:46: sparse: got char * >> drivers/gpu/drm/drm_ioctl.c:636:24: sparse: sparse: non size-preserving pointer to integer cast vim +974 drivers/gpu/drm/drm_gem.c 969 970 void drm_gem_adopt_label(struct drm_gem_object *gem_obj, const char *label) 971 { 972 mutex_lock(&gem_obj->bo_lock); 973 kfree(gem_obj->label); > 974 gem_obj->label = label; 975 mutex_unlock(&gem_obj->bo_lock); 976 } 977 EXPORT_SYMBOL(drm_gem_adopt_label); 978 979 int drm_gem_get_label(struct drm_device *dev, struct drm_file *file_priv, 980 struct drm_handle_label *args) 981 { 982 struct drm_gem_object *gem_obj; 983 int len, ret; 984 985 gem_obj = drm_gem_object_lookup(file_priv, args->handle); 986 if (!gem_obj) { 987 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); 988 return -ENOENT; 989 } 990 991 if (!gem_obj->label) { > 992 args->label = NULL; 993 args->len = 0; 994 return 0; 995 } 996 997 mutex_lock(&gem_obj->bo_lock); 998 len = strlen(gem_obj->label); 999 ret = copy_to_user(u64_to_user_ptr(args->label), gem_obj->label, > 1000 min(args->len, len)); 1001 mutex_unlock(&gem_obj->bo_lock); 1002 args->len = len; 1003 drm_gem_object_put(gem_obj); 1004 return ret; 1005 } 1006 EXPORT_SYMBOL(drm_gem_get_label); 1007 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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