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Message-ID: <202511102116.qWX79pIo-lkp@intel.com>
Date: Mon, 10 Nov 2025 21:37:18 +0800
From: kernel test robot <lkp@...el.com>
To: Mohamed Ahmed <mohamedahmedegypt2001@...il.com>,
linux-kernel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, dri-devel@...ts.freedesktop.org,
Mary Guillemard <mary@...y.zone>,
Faith Ekstrand <faith.ekstrand@...labora.com>,
Lyude Paul <lyude@...hat.com>, Danilo Krummrich <dakr@...nel.org>,
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>,
nouveau@...ts.freedesktop.org,
Mohamed Ahmed <mohamedahmedegypt2001@...il.com>,
James Jones <jajones@...dia.com>
Subject: Re: [PATCH v5 2/5] drm/nouveau/uvmm: Allow larger pages
Hi Mohamed,
kernel test robot noticed the following build errors:
[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.18-rc5 next-20251110]
[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/Mohamed-Ahmed/drm-nouveau-uvmm-Prepare-for-larger-pages/20251109-035142
base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link: https://lore.kernel.org/r/20251108194919.68754-3-mohamedahmedegypt2001%40gmail.com
patch subject: [PATCH v5 2/5] drm/nouveau/uvmm: Allow larger pages
config: i386-randconfig-141-20251110 (https://download.01.org/0day-ci/archive/20251110/202511102116.qWX79pIo-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/20251110/202511102116.qWX79pIo-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/202511102116.qWX79pIo-lkp@intel.com/
All errors (new ones prefixed by >>):
>> drivers/gpu/drm/nouveau/nouveau_uvmm.c:508:16: error: incompatible pointer types passing 'struct drm_device *' to parameter of type 'const struct device *' [-Werror,-Wincompatible-pointer-types]
508 | dev_warn_once(op->gem.obj->dev, "Could not find an appropriate page size.\n");
| ^~~~~~~~~~~~~~~~
include/linux/dev_printk.h:201:27: note: expanded from macro 'dev_warn_once'
201 | dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
| ^~~
include/linux/dev_printk.h:181:13: note: expanded from macro 'dev_level_once'
181 | dev_level(dev, fmt, ##__VA_ARGS__); \
| ^~~
include/linux/dev_printk.h:156:49: note: expanded from macro 'dev_warn'
156 | dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__)
| ^~~
include/linux/dev_printk.h:110:11: note: expanded from macro 'dev_printk_index_wrap'
110 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~
include/linux/dev_printk.h:52:37: note: passing argument to parameter 'dev' here
52 | void _dev_warn(const struct device *dev, const char *fmt, ...);
| ^
1 error generated.
vim +508 drivers/gpu/drm/nouveau/nouveau_uvmm.c
466
467 static u8
468 select_page_shift(struct nouveau_uvmm *uvmm, struct drm_gpuva_op_map *op)
469 {
470 struct nouveau_bo *nvbo = nouveau_gem_object(op->gem.obj);
471
472 /* nouveau_bo_fixup_align() guarantees that the page size will be aligned
473 * for most cases, but it can't handle cases where userspace allocates with
474 * a size and then binds with a smaller granularity. So in order to avoid
475 * breaking old userspace, we need to ensure that the VA is actually
476 * aligned before using it, and if it isn't, then we downgrade to the first
477 * granularity that will fit, which is optimal from a correctness and
478 * performance perspective.
479 */
480 if (op_map_aligned_to_page_shift(op, nvbo->page))
481 return nvbo->page;
482
483 struct nouveau_mem *mem = nouveau_mem(nvbo->bo.resource);
484 struct nvif_vmm *vmm = &uvmm->vmm.vmm;
485 int i;
486
487 /* If the given granularity doesn't fit, let's find one that will fit. */
488 for (i = 0; i < vmm->page_nr; i++) {
489 /* Ignore anything that is bigger or identical to the BO preference. */
490 if (vmm->page[i].shift >= nvbo->page)
491 continue;
492
493 /* Skip incompatible domains. */
494 if ((mem->mem.type & NVIF_MEM_VRAM) && !vmm->page[i].vram)
495 continue;
496 if ((mem->mem.type & NVIF_MEM_HOST) &&
497 (!vmm->page[i].host || vmm->page[i].shift > PAGE_SHIFT))
498 continue;
499
500 /* If it fits, return the proposed shift. */
501 if (op_map_aligned_to_page_shift(op, vmm->page[i].shift))
502 return vmm->page[i].shift;
503 }
504
505 /* If we get here then nothing can reconcile the requirements. This should never
506 * happen.
507 */
> 508 dev_warn_once(op->gem.obj->dev, "Could not find an appropriate page size.\n");
509
510 return PAGE_SHIFT;
511 }
512
--
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