linux-kernel - Re: [PATCH 6/8] drm/panthor: Introduce huge tmpfs mount point option

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Message-ID: <202509301834.aoEcLO0C-lkp@intel.com>
Date: Tue, 30 Sep 2025 18:36:07 +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>,
	Mikołaj Wasiak <mikolaj.wasiak@...el.com>,
	Christian Brauner <brauner@...nel.org>,
	Nitin Gote <nitin.r.gote@...el.com>,
	Andi Shyti <andi.shyti@...ux.intel.com>
Cc: oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org, kernel@...labora.com
Subject: Re: [PATCH 6/8] drm/panthor: Introduce huge tmpfs mount point option

Hi Loïc,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[cannot apply to akpm-mm/mm-everything linus/master v6.17 next-20250929]
[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/20250930-040600
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20250929200316.18417-7-loic.molinari%40collabora.com
patch subject: [PATCH 6/8] drm/panthor: Introduce huge tmpfs mount point option
config: i386-buildonly-randconfig-004-20250930 (https://download.01.org/0day-ci/archive/20250930/202509301834.aoEcLO0C-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250930/202509301834.aoEcLO0C-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/202509301834.aoEcLO0C-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/gpu/drm/panthor/panthor_gem.c: In function 'panthor_gem_init':
>> drivers/gpu/drm/panthor/panthor_gem.c:24:14: error: 'panthor_transparent_hugepage' undeclared (first use in this function); did you mean 'has_transparent_hugepage'?
      24 |         if (!panthor_transparent_hugepage)
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |              has_transparent_hugepage
   drivers/gpu/drm/panthor/panthor_gem.c:24:14: note: each undeclared identifier is reported only once for each function it appears in


vim +24 drivers/gpu/drm/panthor/panthor_gem.c

    19	
    20	void panthor_gem_init(struct panthor_device *ptdev)
    21	{
    22		struct vfsmount *huge_mnt;
    23	
  > 24		if (!panthor_transparent_hugepage)
    25			return;
    26	
    27		huge_mnt = drm_gem_shmem_huge_mnt_create("within_size");
    28		if (IS_ERR(huge_mnt)) {
    29			drm_warn(&ptdev->base, "Can't use Transparent Hugepage (%ld)\n",
    30				 PTR_ERR(huge_mnt));
    31			return;
    32		}
    33	
    34		ptdev->huge_mnt = huge_mnt;
    35	
    36		drm_info(&ptdev->base, "Using Transparent Hugepage\n");
    37	}
    38	

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