tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 2e375b157ddf25336989b074c1f2a88a80ab72f5 commit: 8a89dde40c2bd82755f374bc86b46c77acdfd0b6 [3304/3304] mm: implement hmemcpy API config: arm64-randconfig-r122-20251122 (https://download.01.org/0day-ci/archive/20251122/202511221253.wiWo5CIW-lkp@i...) compiler: aarch64-linux-gcc (GCC) 13.4.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251122/202511221253.wiWo5CIW-lkp@i...) 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/202511221253.wiWo5CIW-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) mm/gmem.c:384:13: sparse: sparse: symbol 'gm_dev_fault' was not declared. Should it be static?

...

mm/gmem.c:813:29: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int enum gm_ret ret @@ got restricted vm_fault_t @@ mm/gmem.c:813:29: sparse: expected unsigned int enum gm_ret ret mm/gmem.c:813:29: sparse: got restricted vm_fault_t

vim +813 mm/gmem.c 765 766 static void do_hmemcpy(struct mm_struct *mm, int hnid, unsigned long dest, 767 unsigned long src, size_t size) 768 { 769 enum gm_ret ret; 770 int page_size = HPAGE_SIZE; 771 struct vm_area_struct *vma_dest, *vma_src; 772 struct gm_mapping *gm_mapping_dest, *gm_mapping_src; 773 struct gm_dev *dev = NULL; 774 struct gm_memcpy_t gmc = {0}; 775 776 if (size == 0) 777 return; 778 779 mmap_read_lock(mm); 780 vma_dest = find_vma(mm, dest); 781 vma_src = find_vma(mm, src); 782 783 if (!vma_src || vma_src->vm_start > src || !vma_dest || vma_dest->vm_start > dest) { 784 gmem_err("hmemcpy: the vma find by src/dest is NULL!"); 785 goto unlock_mm; 786 } 787 788 gm_mapping_dest = vm_object_lookup(vma_dest->vm_obj, dest & ~(page_size - 1)); 789 gm_mapping_src = vm_object_lookup(vma_src->vm_obj, src & ~(page_size - 1)); 790 791 if (!gm_mapping_src) { 792 gmem_err("hmemcpy: gm_mapping_src is NULL"); 793 goto unlock_mm; 794 } 795 796 if (gm_mapping_nomap(gm_mapping_src)) { 797 gmem_err("hmemcpy: src address is not mapping to CPU or device"); 798 goto unlock_mm; 799 } 800 801 if (hnid != -1) { 802 dev = get_gm_dev(hnid); 803 if (!dev) { 804 gmem_err("hmemcpy: hnode's dev is NULL"); 805 goto unlock_mm; 806 } 807 } 808 809 // Trigger dest page fault on host or device 810 if (!gm_mapping_dest || gm_mapping_nomap(gm_mapping_dest) 811 || !hnid_match_dest(hnid, gm_mapping_dest)) { 812 if (hnid == -1) {

813 ret = handle_mm_fault(vma_dest, dest & ~(page_size - 1), FAULT_FLAG_USER | 814 FAULT_FLAG_INSTRUCTION | FAULT_FLAG_WRITE, NULL); 815 if (ret) { 816 gmem_err("%s: failed to execute host page fault, ret:%d", 817 __func__, ret); 818 goto unlock_mm; 819 } 820 } else { 821 ret = gm_dev_fault_locked(mm, dest & ~(page_size - 1), dev, MADV_WILLNEED); 822 if (ret != GM_RET_SUCCESS) { 823 gmem_err("%s: failed to excecute dev page fault.", __func__); 824 goto unlock_mm; 825 } 826 } 827 } 828 if (!gm_mapping_dest) 829 gm_mapping_dest = vm_object_lookup(vma_dest->vm_obj, round_down(dest, page_size)); 830 831 if (gm_mapping_dest && gm_mapping_dest != gm_mapping_src) 832 mutex_lock(&gm_mapping_dest->lock); 833 834 mutex_lock(&gm_mapping_src->lock); 835 // Use memcpy when there is no device address, otherwise use peer_memcpy 836 if (hnid == -1) { 837 if (gm_mapping_cpu(gm_mapping_src)) { // host to host 838 gmem_err("hmemcpy: host to host is unimplemented\n"); 839 goto unlock_gm_mapping; 840 } else if (gm_mapping_device(gm_mapping_src)) { // device to host 841 dev = gm_mapping_src->dev; 842 gmc.dest = phys_to_dma(dev->dma_dev, 843 page_to_phys(gm_mapping_dest->page) + (dest & (page_size - 1))); 844 gmc.src = gm_mapping_src->gm_page->dev_dma_addr + (src & (page_size - 1)); 845 gmc.kind = GM_MEMCPY_D2H; 846 } else { 847 gmem_err("hmemcpy: src address is not mapping to CPU or device"); 848 goto unlock_gm_mapping; 849 } 850 } else { 851 if (gm_mapping_cpu(gm_mapping_src)) { // host to device 852 gmc.dest = gm_mapping_dest->gm_page->dev_dma_addr + 853 (dest & (page_size - 1)); 854 gmc.src = phys_to_dma(dev->dma_dev, 855 page_to_phys(gm_mapping_src->page) + (src & (page_size - 1))); 856 gmc.kind = GM_MEMCPY_H2D; 857 } else if (gm_mapping_device(gm_mapping_src)) { // device to device 858 gmem_err("hmemcpy: device to device is unimplemented\n"); 859 goto unlock_gm_mapping; 860 } else { 861 gmem_err("hmemcpy: src address is not mapping to CPU or device"); 862 goto unlock_gm_mapping; 863 } 864 } 865 gmc.mm = mm; 866 gmc.dev = dev; 867 gmc.size = size; 868 dev->mmu->peer_hmemcpy(&gmc); 869 870 unlock_gm_mapping: 871 mutex_unlock(&gm_mapping_src->lock); 872 if (gm_mapping_dest && gm_mapping_dest != gm_mapping_src) 873 mutex_unlock(&gm_mapping_dest->lock); 874 unlock_mm: 875 mmap_read_unlock(mm); 876 } 877

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