Hi Jocelyn, kernel test robot noticed the following build warnings:
[auto build test WARNING on 7247efca0dcbc8ac6147db9200ed1549c0662465] url: https://github.com/intel-lab-lkp/linux/commits/Jocelyn-Falempe/drm-i915-fbdev-Add-intel_fbdev_get_map/20250606-200804 base: 7247efca0dcbc8ac6147db9200ed1549c0662465 patch link: https://lore.kernel.org/r/20250606120519.753928-5-jfalempe%40redhat.com patch subject: [PATCH v8 4/9] drm/ttm: Add ttm_bo_kmap_try_from_panic() config: x86_64-buildonly-randconfig-001-20250607 (https://download.01.org/0day-ci/archive/20250607/202506070340.p5ozorwh-...@intel.com/config) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) rustc: rustc 1.78.0 (9b00956e5 2024-04-29) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250607/202506070340.p5ozorwh-...@intel.com/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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506070340.p5ozorwh-...@intel.com/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/ttm/ttm_bo_util.c:381: warning: Cannot understand * on line 381 - I thought it was a doc line vim +381 drivers/gpu/drm/ttm/ttm_bo_util.c 379 380 /** > 381 * 382 * ttm_bo_kmap_try_from_panic 383 * 384 * @bo: The buffer object 385 * @page: The page to map 386 * 387 * Sets up a kernel virtual mapping using kmap_local_page_try_from_panic(). 388 * This can safely be called from the panic handler, if you make sure the bo 389 * is the one being displayed, so is properly allocated, and won't be modified. 390 * 391 * Returns the vaddr, that you can use to write to the bo, and that you should 392 * pass to kunmap_local() when you're done with this page, or NULL if the bo 393 * is in iomem. 394 */ 395 void *ttm_bo_kmap_try_from_panic(struct ttm_buffer_object *bo, unsigned long page) 396 { 397 if (page + 1 > PFN_UP(bo->resource->size)) 398 return NULL; 399 400 if (!bo->resource->bus.is_iomem && bo->ttm->pages && bo->ttm->pages[page]) 401 return kmap_local_page_try_from_panic(bo->ttm->pages[page]); 402 403 return NULL; 404 } 405 EXPORT_SYMBOL(ttm_bo_kmap_try_from_panic); 406 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
