From: kernel test robot <lkp@intel.com>
To: cros-kernel-buildreports@googlegroups.com
Cc: oe-kbuild-all@lists.linux.dev
Subject: [android-common:android-mainline-desktop 214/214] drivers/gpu/drm/drm_gem_shmem_helper.c:584:24: error: use of undeclared identifier 'PMD_SHIFT'
Date: Sat, 16 May 2026 18:53:01 +0800 [thread overview]
Message-ID: <202605161857.dxGE4AQU-lkp@intel.com> (raw)
Hi Carlos,
First bad commit (maybe != root cause):
tree: https://android.googlesource.com/kernel/common android-mainline-desktop
head: 25ad575177d0d2370faad841ed596e791ba30711
commit: 0cc6f52b2aab23f59b9b92188194b0847105ceee [214/214] Merge 0bcb517f0a70 ("Merge tag 'mm-hotfixes-stable-2026-03-28-10-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm") into android-mainline
config: arm-randconfig-r123-20260516 (https://download.01.org/0day-ci/archive/20260516/202605161857.dxGE4AQU-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260516/202605161857.dxGE4AQU-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605161857.dxGE4AQU-lkp@intel.com/
All errors (new ones prefixed by >>):
>> drivers/gpu/drm/drm_gem_shmem_helper.c:584:24: error: use of undeclared identifier 'PMD_SHIFT'
584 | if (order && order != PMD_ORDER)
| ^~~~~~~~~
include/linux/pgtable.h:8:20: note: expanded from macro 'PMD_ORDER'
8 | #define PMD_ORDER (PMD_SHIFT - PAGE_SHIFT)
| ^~~~~~~~~
1 error generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for DRM_GEM_SHMEM_HELPER
Depends on [n]: HAS_IOMEM [=y] && DRM [=y] && MMU [=n]
Selected by [y]:
- GKI_HIDDEN_DRM_CONFIGS [=y] && DRM [=y]
WARNING: unmet direct dependencies detected for DRM_TTM
Depends on [n]: HAS_IOMEM [=y] && DRM [=y] && MMU [=n]
Selected by [y]:
- GKI_HIDDEN_DRM_CONFIGS [=y] && HAS_IOMEM [=y] && DRM [=y]
WARNING: unmet direct dependencies detected for PAGE_POOL
Depends on [n]: NET [=n]
Selected by [y]:
- GKI_HIDDEN_NET_CONFIGS [=y]
WARNING: unmet direct dependencies detected for NET_DEVLINK
Depends on [n]: NET [=n]
Selected by [y]:
- GKI_HIDDEN_NET_CONFIGS [=y]
WARNING: unmet direct dependencies detected for DIMLIB
Depends on [n]: NET [=n]
Selected by [y]:
- GKI_HIDDEN_VIRTUAL_CONFIGS [=y]
WARNING: unmet direct dependencies detected for NET_PTP_CLASSIFY
Depends on [n]: NET [=n]
Selected by [y]:
- GKI_HIDDEN_NET_CONFIGS [=y]
WARNING: unmet direct dependencies detected for HMM_MIRROR
Depends on [n]: MMU [=n]
Selected by [y]:
- GKI_HIDDEN_DRM_CONFIGS [=y] && DRM [=y]
WARNING: unmet direct dependencies detected for HVC_DRIVER
Depends on [n]: TTY [=n]
Selected by [y]:
- GKI_HIDDEN_VIRTUAL_CONFIGS [=y]
vim +/PMD_SHIFT +584 drivers/gpu/drm/drm_gem_shmem_helper.c
211b9a39f2619b Loïc Molinari 2025-12-05 572
fc3bbf34e643fa Pedro Demarchi Gomes 2026-03-18 573 static vm_fault_t drm_gem_shmem_any_fault(struct vm_fault *vmf, unsigned int order)
2194a63a818db7 Noralf Trønnes 2019-03-12 574 {
2194a63a818db7 Noralf Trønnes 2019-03-12 575 struct vm_area_struct *vma = vmf->vma;
2194a63a818db7 Noralf Trønnes 2019-03-12 576 struct drm_gem_object *obj = vma->vm_private_data;
2194a63a818db7 Noralf Trønnes 2019-03-12 577 struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
2194a63a818db7 Noralf Trønnes 2019-03-12 578 loff_t num_pages = obj->size >> PAGE_SHIFT;
d611b4a0907cec Neil Roberts 2021-02-23 579 vm_fault_t ret;
211b9a39f2619b Loïc Molinari 2025-12-05 580 struct page **pages = shmem->pages;
11d5a4745e00e7 Neil Roberts 2021-02-23 581 pgoff_t page_offset;
211b9a39f2619b Loïc Molinari 2025-12-05 582 unsigned long pfn;
11d5a4745e00e7 Neil Roberts 2021-02-23 583
fc3bbf34e643fa Pedro Demarchi Gomes 2026-03-18 @584 if (order && order != PMD_ORDER)
fc3bbf34e643fa Pedro Demarchi Gomes 2026-03-18 585 return VM_FAULT_FALLBACK;
fc3bbf34e643fa Pedro Demarchi Gomes 2026-03-18 586
9d2d49027c3a96 Loïc Molinari 2025-12-05 587 /* Offset to faulty address in the VMA. */
9d2d49027c3a96 Loïc Molinari 2025-12-05 588 page_offset = vmf->pgoff - vma->vm_pgoff;
2194a63a818db7 Noralf Trønnes 2019-03-12 589
21aa27ddc58269 Dmitry Osipenko 2023-05-30 590 dma_resv_lock(shmem->base.resv, NULL);
2194a63a818db7 Noralf Trønnes 2019-03-12 591
11d5a4745e00e7 Neil Roberts 2021-02-23 592 if (page_offset >= num_pages ||
3f6a1e22fae95a Dmitry Osipenko 2022-11-16 593 drm_WARN_ON_ONCE(obj->dev, !shmem->pages) ||
d611b4a0907cec Neil Roberts 2021-02-23 594 shmem->madv < 0) {
d611b4a0907cec Neil Roberts 2021-02-23 595 ret = VM_FAULT_SIGBUS;
211b9a39f2619b Loïc Molinari 2025-12-05 596 goto out;
211b9a39f2619b Loïc Molinari 2025-12-05 597 }
2194a63a818db7 Noralf Trønnes 2019-03-12 598
211b9a39f2619b Loïc Molinari 2025-12-05 599 pfn = page_to_pfn(pages[page_offset]);
fc3bbf34e643fa Pedro Demarchi Gomes 2026-03-18 600 ret = try_insert_pfn(vmf, order, pfn);
211b9a39f2619b Loïc Molinari 2025-12-05 601
211b9a39f2619b Loïc Molinari 2025-12-05 602 out:
21aa27ddc58269 Dmitry Osipenko 2023-05-30 603 dma_resv_unlock(shmem->base.resv);
d611b4a0907cec Neil Roberts 2021-02-23 604
d611b4a0907cec Neil Roberts 2021-02-23 605 return ret;
2194a63a818db7 Noralf Trønnes 2019-03-12 606 }
2194a63a818db7 Noralf Trønnes 2019-03-12 607
:::::: The code at line 584 was first introduced by commit
:::::: fc3bbf34e643faa8678aabdc3810c60109f3435a drm/shmem-helper: Fix huge page mapping in fault handler
:::::: TO: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
:::::: CC: Boris Brezillon <boris.brezillon@collabora.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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