linux-kernel - Re: [PATCH v5 06/12] drm/i915: Use huge tmpfs mountpoint helpers

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Message-ID: <202510220918.LOLA5KIF-lkp@intel.com>
Date: Wed, 22 Oct 2025 09:47:33 +0800
From: kernel test robot <lkp@...el.com>
To: Loïc Molinari <loic.molinari@...labora.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
	Boris Brezillon <bbrezillon@...nel.org>,
	Rob Herring <robh@...nel.org>, Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>, Melissa Wen <mwen@...lia.com>,
	Maíra Canal <mcanal@...lia.com>,
	Hugh Dickins <hughd@...gle.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Nitin Gote <nitin.r.gote@...el.com>,
	Andi Shyti <andi.shyti@...ux.intel.com>,
	Jonathan Corbet <corbet@....net>,
	Christopher Healy <healych@...zon.com>,
	Matthew Wilcox <willy@...radead.org>,
	Bagas Sanjaya <bagasdotme@...il.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 06/12] drm/i915: Use huge tmpfs mountpoint helpers

Hi Loïc,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20251021]
[also build test ERROR on v6.18-rc2]
[cannot apply to akpm-mm/mm-everything drm-misc/drm-misc-next linus/master v6.18-rc2 v6.18-rc1 v6.17]
[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-Simplify-page-offset-calculation-in-fault-handler/20251021-193355
base:   next-20251021
patch link:    https://lore.kernel.org/r/20251021113049.17242-7-loic.molinari%40collabora.com
patch subject: [PATCH v5 06/12] drm/i915: Use huge tmpfs mountpoint helpers
config: x86_64-buildonly-randconfig-001-20251022 (https://download.01.org/0day-ci/archive/20251022/202510220918.LOLA5KIF-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251022/202510220918.LOLA5KIF-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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510220918.LOLA5KIF-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gem/i915_gem_shmem.c:511:46: error: no member named 'huge_mnt' in 'struct drm_device'
     511 |                 filp = shmem_file_setup_with_mnt(i915->drm.huge_mnt, "i915",
         |                                                  ~~~~~~~~~ ^
   1 error generated.


vim +511 drivers/gpu/drm/i915/gem/i915_gem_shmem.c

   486	
   487	static int __create_shmem(struct drm_i915_private *i915,
   488				  struct drm_gem_object *obj,
   489				  resource_size_t size)
   490	{
   491		unsigned long flags = VM_NORESERVE;
   492		struct file *filp;
   493	
   494		drm_gem_private_object_init(&i915->drm, obj, size);
   495	
   496		/* XXX: The __shmem_file_setup() function returns -EINVAL if size is
   497		 * greater than MAX_LFS_FILESIZE.
   498		 * To handle the same error as other code that returns -E2BIG when
   499		 * the size is too large, we add a code that returns -E2BIG when the
   500		 * size is larger than the size that can be handled.
   501		 * If BITS_PER_LONG is 32, size > MAX_LFS_FILESIZE is always false,
   502		 * so we only needs to check when BITS_PER_LONG is 64.
   503		 * If BITS_PER_LONG is 32, E2BIG checks are processed when
   504		 * i915_gem_object_size_2big() is called before init_object() callback
   505		 * is called.
   506		 */
   507		if (BITS_PER_LONG == 64 && size > MAX_LFS_FILESIZE)
   508			return -E2BIG;
   509	
   510		if (drm_gem_has_huge_mnt(&i915->drm))
 > 511			filp = shmem_file_setup_with_mnt(i915->drm.huge_mnt, "i915",
   512							 size, flags);
   513		else
   514			filp = shmem_file_setup("i915", size, flags);
   515		if (IS_ERR(filp))
   516			return PTR_ERR(filp);
   517	
   518		/*
   519		 * Prevent -EFBIG by allowing large writes beyond MAX_NON_LFS on shmem
   520		 * objects by setting O_LARGEFILE.
   521		 */
   522		if (force_o_largefile())
   523			filp->f_flags |= O_LARGEFILE;
   524	
   525		obj->filp = filp;
   526		return 0;
   527	}
   528	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki