tree: git://people.freedesktop.org/~agd5f/linux.git drm-next-5.2-wip head: 5666aea3ea494d4dd96df8f092cab32dbeeac321 commit: 95db8d6001df8966e3370a66c9f358925fbcc890 [21/42] drm/amdgpu: replace get_user_pages with HMM mirror helpers config: s390-allyesconfig (attached as .config) compiler: s390x-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 95db8d6001df8966e3370a66c9f358925fbcc890 # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=s390

Note: the radeon-alex/drm-next-5.2-wip HEAD 5666aea3ea494d4dd96df8f092cab32dbeeac321 builds fine. It only hurts bisectibility.

All errors (new ones prefixed by >>):

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:713:19: error: field 'range' has incomplete type struct hmm_range range; ^~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c: In function 'amdgpu_ttm_tt_get_user_pages': drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:738:7: error: dereferencing pointer to incomplete type 'struct hmm_range' range->vma = find_vma(mm, gtt->userptr); ^~ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:756:32: error: 'HMM_PFN_VALID' undeclared (first use in this function); did you mean 'DP_SU_VALID'? range->pfns[0] = range->flags[HMM_PFN_VALID]; ^~~~~~~~~~~~~ DP_SU_VALID drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:756:32: note: each undeclared identifier is reported only once for each function it appears in drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:758:22: error: 'HMM_PFN_WRITE' undeclared (first use in this function); did you mean 'HMM_PFN_VALID'? 0 : range->flags[HMM_PFN_WRITE]; ^~~~~~~~~~~~~ HMM_PFN_VALID drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:763:6: error: implicit declaration of function 'hmm_vma_fault'; did you mean 'hmm_mm_init'? [-Werror=implicit-function-declaration] r = hmm_vma_fault(range, true); ^~~~~~~~~~~~~ hmm_mm_init drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:770:14: error: implicit declaration of function 'hmm_pfn_to_page'; did you mean '__pfn_to_page'? [-Werror=implicit-function-declaration] pages[i] = hmm_pfn_to_page(range, range->pfns[i]); ^~~~~~~~~~~~~~~ __pfn_to_page drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c: In function 'amdgpu_ttm_tt_get_user_pages_done':

...

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:798:7: error: implicit declaration of function 'hmm_vma_range_done'; did you mean '__range_ok'? [-Werror=implicit-function-declaration]

r = hmm_vma_range_done(&gtt->range); ^~~~~~~~~~~~~~~~~~ __range_ok cc1: some warnings being treated as errors

vim +798 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

715 716 /** 717 * amdgpu_ttm_tt_get_user_pages - get device accessible pages that back user 718 * memory and start HMM tracking CPU page table update 719 * 720 * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and only 721 * once afterwards to stop HMM tracking 722 */ 723 int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages) 724 { 725 struct amdgpu_ttm_tt *gtt = (void *)ttm; 726 struct mm_struct *mm = gtt->usertask->mm; 727 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE; 728 struct hmm_range *range = &gtt->range; 729 int r = 0, i; 730 731 if (!mm) /* Happens during process shutdown */ 732 return -ESRCH; 733 734 amdgpu_hmm_init_range(range); 735 736 down_read(&mm->mmap_sem); 737 738 range->vma = find_vma(mm, gtt->userptr); 739 if (!range_in_vma(range->vma, gtt->userptr, end)) 740 r = -EFAULT; 741 else if ((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) && 742 range->vma->vm_file) 743 r = -EPERM; 744 if (r) 745 goto out; 746 747 range->pfns = kvmalloc_array(ttm->num_pages, sizeof(uint64_t), 748 GFP_KERNEL); 749 if (range->pfns == NULL) { 750 r = -ENOMEM; 751 goto out; 752 } 753 range->start = gtt->userptr; 754 range->end = end; 755 756 range->pfns[0] = range->flags[HMM_PFN_VALID]; 757 range->pfns[0] |= amdgpu_ttm_tt_is_readonly(ttm) ? 758 0 : range->flags[HMM_PFN_WRITE]; 759 for (i = 1; i < ttm->num_pages; i++) 760 range->pfns[i] = range->pfns[0]; 761 762 /* This may trigger page table update */

763 r = hmm_vma_fault(range, true);

764 if (r) 765 goto out_free_pfns; 766 767 up_read(&mm->mmap_sem); 768 769 for (i = 0; i < ttm->num_pages; i++) 770 pages[i] = hmm_pfn_to_page(range, range->pfns[i]); 771 772 return 0; 773 774 out_free_pfns: 775 kvfree(range->pfns); 776 range->pfns = NULL; 777 out: 778 up_read(&mm->mmap_sem); 779 return r; 780 } 781 782 /** 783 * amdgpu_ttm_tt_userptr_range_done - stop HMM track the CPU page table change 784 * Check if the pages backing this ttm range have been invalidated 785 * 786 * Returns: true if pages are still valid 787 */ 788 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm) 789 { 790 struct amdgpu_ttm_tt *gtt = (void *)ttm; 791 bool r = false; 792 793 if (!gtt || !gtt->userptr) 794 return false; 795 796 WARN_ONCE(!gtt->range.pfns, "No user pages to check\n"); 797 if (gtt->range.pfns) {

798 r = hmm_vma_range_done(&gtt->range);

799 kvfree(gtt->range.pfns); 800 gtt->range.pfns = NULL; 801 } 802 803 return r; 804 } 805

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