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X-CSE-ConnectionGUID: ebSrsyBZTFmXAbjq0cg7xg== X-CSE-MsgGUID: N+jRGKKNQ0GBot47sO2EZQ== X-IronPort-AV: E=McAfee;i="6800,10657,11577"; a="64921811" X-IronPort-AV: E=Sophos;i="6.19,218,1754982000"; d="scan'208";a="64921811" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2025 00:49:12 -0700 X-CSE-ConnectionGUID: mXA4EAEiTXqigEW2vYLEcw== X-CSE-MsgGUID: PgyogO0/TP2+AFnJYA+RAg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,218,1754982000"; d="scan'208";a="185304299" Received: from lkp-server01.sh.intel.com (HELO 6a630e8620ab) ([10.239.97.150]) by fmviesa005.fm.intel.com with ESMTP; 10 Oct 2025 00:49:05 -0700 Received: from kbuild by 6a630e8620ab with local (Exim 4.96) (envelope-from ) id 1v77s6-0002Ql-34; Fri, 10 Oct 2025 07:49:02 +0000 Date: Fri, 10 Oct 2025 15:48:34 +0800 From: kernel test robot To: =?iso-8859-1?Q?Lo=EFc?= Molinari , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Boris Brezillon , Rob Herring , Steven Price , Liviu Dudau , Melissa Wen , =?iso-8859-1?Q?Ma=EDra?= Canal , Hugh Dickins , Baolin Wang , Andrew Morton , Al Viro , Christian Brauner , Nitin Gote , Andi Shyti , Christopher Healy Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Linux Memory Management List , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, kernel@collabora.com Subject: Re: [PATCH v3 02/10] drm/gem: Introduce drm_gem_get_unmapped_area() fop Message-ID: <202510101507.UiRzhiAP-lkp@intel.com> References: <20251004093054.21388-3-loic.molinari@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20251004093054.21388-3-loic.molinari@collabora.com> X-Rspamd-Server: rspam05 X-Stat-Signature: 6cz63iosc1ysoskg4j75mxxjn1jpq6n9 X-Rspam-User: X-Rspamd-Queue-Id: 0E0DE140003 X-HE-Tag: 1760082552-856578 X-HE-Meta: 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 rvYNmXeL 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Loïc, kernel test robot noticed the following build errors: [auto build test ERROR on drm-misc/drm-misc-next] [also build test ERROR on linus/master v6.17 next-20251009] [cannot apply to akpm-mm/mm-everything] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Lo-c-Molinari/drm-shmem-helper-Add-huge-page-fault-handler/20251004-173347 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20251004093054.21388-3-loic.molinari%40collabora.com patch subject: [PATCH v3 02/10] drm/gem: Introduce drm_gem_get_unmapped_area() fop config: riscv-randconfig-001-20251010 (https://download.01.org/0day-ci/archive/20251010/202510101507.UiRzhiAP-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 39f292ffa13d7ca0d1edff27ac8fd55024bb4d19) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251010/202510101507.UiRzhiAP-lkp@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 | Closes: https://lore.kernel.org/oe-kbuild-all/202510101507.UiRzhiAP-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:804:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 804 | insb(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb' 104 | #define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:812:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 812 | insw(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw' 105 | #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:820:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 820 | insl(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl' 106 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:829:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 829 | outsb(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb' 118 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:838:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 838 | outsw(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw' 119 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:847:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 847 | outsl(addr, buffer, count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl' 120 | #define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count) | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/drm_gem.c:28: In file included from include/linux/dma-buf.h:16: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:12: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:1175:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 1175 | return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; | ~~~~~~~~~~ ^ >> drivers/gpu/drm/drm_gem.c:1271:10: error: call to undeclared function 'mm_get_unmapped_area'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1271 | return mm_get_unmapped_area(current->mm, filp, uaddr, len, 0, | ^ drivers/gpu/drm/drm_gem.c:1271:10: note: did you mean '__get_unmapped_area'? include/linux/mm.h:3337:1: note: '__get_unmapped_area' declared here 3337 | __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, | ^ 7 warnings and 1 error generated. vim +/mm_get_unmapped_area +1271 drivers/gpu/drm/drm_gem.c 1239 1240 /** 1241 * drm_gem_get_unmapped_area - get memory mapping region routine for GEM objects 1242 * @filp: DRM file pointer 1243 * @uaddr: User address hint 1244 * @len: Mapping length 1245 * @pgoff: Offset (in pages) 1246 * @flags: Mapping flags 1247 * 1248 * If a driver supports GEM object mapping, before ending up in drm_gem_mmap(), 1249 * mmap calls on the DRM file descriptor will first try to find a free linear 1250 * address space large enough for a mapping. Since GEM objects are backed by 1251 * shmem buffers, this should preferably be handled by the shmem virtual memory 1252 * filesystem which can appropriately align addresses to huge page sizes when 1253 * needed. 1254 * 1255 * Look up the GEM object based on the offset passed in (vma->vm_pgoff will 1256 * contain the fake offset we created) and call shmem_get_unmapped_area() with 1257 * the right file pointer. 1258 * 1259 * If a GEM object is not available at the given offset or if the caller is not 1260 * granted access to it, fall back to mm_get_unmapped_area(). 1261 */ 1262 unsigned long drm_gem_get_unmapped_area(struct file *filp, unsigned long uaddr, 1263 unsigned long len, unsigned long pgoff, 1264 unsigned long flags) 1265 { 1266 struct drm_gem_object *obj; 1267 unsigned long ret; 1268 1269 obj = drm_gem_object_lookup_from_offset(filp, pgoff, len >> PAGE_SHIFT); 1270 if (IS_ERR(obj)) > 1271 return mm_get_unmapped_area(current->mm, filp, uaddr, len, 0, 1272 flags); 1273 1274 ret = shmem_get_unmapped_area(obj->filp, uaddr, len, 0, flags); 1275 1276 drm_gem_object_put(obj); 1277 1278 return ret; 1279 } 1280 EXPORT_SYMBOL(drm_gem_get_unmapped_area); 1281 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki