Hi "Thomas, I love your patch! Yet something to improve: [auto build test ERROR on drm-exynos/exynos-drm-next] [also build test ERROR on drm-intel/for-linux-next drm-tip/drm-tip linus/master v5.6-rc4 next-20200303] [cannot apply to tegra-drm/drm/tegra/for-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Thomas-Hellstr-m-VMware/Huge-page-table-entries-for-TTM/20200304-022543 base: https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next config: c6x-allyesconfig (attached as .config) compiler: c6x-elf-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=c6x If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): drivers/gpu/drm/drm_file.c: In function 'drm_get_unmapped_area': >> drivers/gpu/drm/drm_file.c:966:20: error: 'struct mm_struct' has no member named 'get_unmapped_area' return current->mm->get_unmapped_area(file, uaddr, len, pgoff, flags); ^~ >> drivers/gpu/drm/drm_file.c:967:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ vim +966 drivers/gpu/drm/drm_file.c 882 883 /** 884 * drm_get_unmapped_area() - Get an unused user-space virtual memory area 885 * suitable for huge page table entries. 886 * @file: The struct file representing the address space being mmap()'d. 887 * @uaddr: Start address suggested by user-space. 888 * @len: Length of the area. 889 * @pgoff: The page offset into the address space. 890 * @flags: mmap flags 891 * @mgr: The address space manager used by the drm driver. This argument can 892 * probably be removed at some point when all drivers use the same 893 * address space manager. 894 * 895 * This function attempts to find an unused user-space virtual memory area 896 * that can accommodate the size we want to map, and that is properly 897 * aligned to facilitate huge page table entries matching actual 898 * huge pages or huge page aligned memory in buffer objects. Buffer objects 899 * are assumed to start at huge page boundary pfns (io memory) or be 900 * populated by huge pages aligned to the start of the buffer object 901 * (system- or coherent memory). Adapted from shmem_get_unmapped_area. 902 * 903 * Return: aligned user-space address. 904 */ 905 unsigned long drm_get_unmapped_area(struct file *file, 906 unsigned long uaddr, unsigned long len, 907 unsigned long pgoff, unsigned long flags, 908 struct drm_vma_offset_manager *mgr) 909 { 910 unsigned long addr; 911 unsigned long inflated_addr; 912 struct drm_vma_offset_node *node; 913 914 if (len > TASK_SIZE) 915 return -ENOMEM; 916 917 /* 918 * @pgoff is the file page-offset the huge page boundaries of 919 * which typically aligns to physical address huge page boundaries. 920 * That's not true for DRM, however, where physical address huge 921 * page boundaries instead are aligned with the offset from 922 * buffer object start. So adjust @pgoff to be the offset from 923 * buffer object start. 924 */ 925 drm_vma_offset_lock_lookup(mgr); 926 node = drm_vma_offset_lookup_locked(mgr, pgoff, 1); 927 if (node) 928 pgoff -= node->vm_node.start; 929 drm_vma_offset_unlock_lookup(mgr); 930 931 addr = current->mm->get_unmapped_area(file, uaddr, len, pgoff, flags); 932 if (IS_ERR_VALUE(addr)) 933 return addr; 934 if (addr & ~PAGE_MASK) 935 return addr; 936 if (addr > TASK_SIZE - len) 937 return addr; 938 939 if (len < HPAGE_PMD_SIZE) 940 return addr; 941 if (flags & MAP_FIXED) 942 return addr; 943 /* 944 * Our priority is to support MAP_SHARED mapped hugely; 945 * and support MAP_PRIVATE mapped hugely too, until it is COWed. 946 * But if caller specified an address hint, respect that as before. 947 */ 948 if (uaddr) 949 return addr; 950 951 inflated_addr = drm_addr_inflate(addr, len, pgoff, flags, 952 HPAGE_PMD_SIZE); 953 954 if (IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) && 955 len >= HPAGE_PUD_SIZE) 956 inflated_addr = drm_addr_inflate(inflated_addr, len, pgoff, 957 flags, HPAGE_PUD_SIZE); 958 return inflated_addr; 959 } 960 #else /* CONFIG_TRANSPARENT_HUGEPAGE */ 961 unsigned long drm_get_unmapped_area(struct file *file, 962 unsigned long uaddr, unsigned long len, 963 unsigned long pgoff, unsigned long flags, 964 struct drm_vma_offset_manager *mgr) 965 { > 966 return current->mm->get_unmapped_area(file, uaddr, len, pgoff, flags); > 967 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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