tree: https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next head: 0823bd894278e4c0f1acb8f3a8a3c67745e6d1f6 commit: 99bda20d6d4cac30ed6d357658d8bc328c3b27d9 [4/11] drm/gem: Introduce drm_gem_get_unmapped_area() fop config: arm-randconfig-003-20251209 (https://download.01.org/0day-ci/archive/20251209/[email protected]/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 6ec8c4351cfc1d0627d1633b02ea787bd29c77d8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/[email protected]/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): >> drivers/gpu/drm/drm_gem.c:1261:10: error: call to undeclared function >> 'mm_get_unmapped_area'; ISO C99 and later do not support implicit function >> declarations [-Wimplicit-function-declaration] 1261 | return mm_get_unmapped_area(current->mm, filp, uaddr, len, 0, | ^ drivers/gpu/drm/drm_gem.c:1261:10: note: did you mean '__get_unmapped_area'? include/linux/mm.h:3441:1: note: '__get_unmapped_area' declared here 3441 | __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, | ^ 1 error generated. vim +/mm_get_unmapped_area +1261 drivers/gpu/drm/drm_gem.c 1229 1230 /** 1231 * drm_gem_get_unmapped_area - get memory mapping region routine for GEM objects 1232 * @filp: DRM file pointer 1233 * @uaddr: User address hint 1234 * @len: Mapping length 1235 * @pgoff: Offset (in pages) 1236 * @flags: Mapping flags 1237 * 1238 * If a driver supports GEM object mapping, before ending up in drm_gem_mmap(), 1239 * mmap calls on the DRM file descriptor will first try to find a free linear 1240 * address space large enough for a mapping. Since GEM objects are backed by 1241 * shmem buffers, this should preferably be handled by the shmem virtual memory 1242 * filesystem which can appropriately align addresses to huge page sizes when 1243 * needed. 1244 * 1245 * Look up the GEM object based on the offset passed in (vma->vm_pgoff will 1246 * contain the fake offset we created) and call shmem_get_unmapped_area() with 1247 * the right file pointer. 1248 * 1249 * If a GEM object is not available at the given offset or if the caller is not 1250 * granted access to it, fall back to mm_get_unmapped_area(). 1251 */ 1252 unsigned long drm_gem_get_unmapped_area(struct file *filp, unsigned long uaddr, 1253 unsigned long len, unsigned long pgoff, 1254 unsigned long flags) 1255 { 1256 struct drm_gem_object *obj; 1257 unsigned long ret; 1258 1259 obj = drm_gem_object_lookup_at_offset(filp, pgoff, len >> PAGE_SHIFT); 1260 if (IS_ERR(obj) || !obj->filp || !obj->filp->f_op->get_unmapped_area) > 1261 return mm_get_unmapped_area(current->mm, filp, uaddr, > len, 0, 1262 flags); 1263 1264 ret = obj->filp->f_op->get_unmapped_area(obj->filp, uaddr, len, 0, 1265 flags); 1266 1267 drm_gem_object_put(obj); 1268 1269 return ret; 1270 } 1271 EXPORT_SYMBOL_GPL(drm_gem_get_unmapped_area); 1272 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
