tree: git://people.freedesktop.org/~agd5f/linux.git raven head: c6ee08eda872bc7ac60ed0ba82a5d85e696a894c commit: a1146cea5877c42e10858082cf9018fd63165a92 [340/1060] drm/amdgpu: handle CPU access for split VRAM buffers (v2) config: parisc-allyesconfig (attached as .config) compiler: hppa-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a1146cea5877c42e10858082cf9018fd63165a92 # save the attached .config to linux build tree make.cross ARCH=parisc

All error/warnings (new ones prefixed by >>):

In file included from ./arch/parisc/include/generated/asm/div64.h:1:0, from include/linux/kernel.h:149, from include/linux/list.h:8, from include/drm/drm_hashtab.h:38, from include/drm/ttm/ttm_bo_api.h:34, from drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:32: drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c: In function 'amdgpu_ttm_io_mem_pfn': include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^

...

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:556:16: note: in expansion of macro 'do_div'

page_offset = do_div(offset, size); ^~~~~~ In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/list.h:4, from include/drm/drm_hashtab.h:38, from include/drm/ttm/ttm_bo_api.h:34, from drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:32: include/asm-generic/div64.h:220:25: warning: right shift count >= width of type [-Wshift-count-overflow] } else if (likely(((n) >> 32) == 0)) { \ ^ include/linux/compiler.h:178:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^

...

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:556:16: note: in expansion of macro 'do_div'

page_offset = do_div(offset, size); ^~~~~~ In file included from ./arch/parisc/include/generated/asm/div64.h:1:0, from include/linux/kernel.h:149, from include/linux/list.h:8, from include/drm/drm_hashtab.h:38, from include/drm/ttm/ttm_bo_api.h:34, from drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:32:

...

include/asm-generic/div64.h:224:22: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types]

__rem = __div64_32(&(n), __base); \ ^

...

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:556:16: note: in expansion of macro 'do_div'

page_offset = do_div(offset, size); ^~~~~~ include/asm-generic/div64.h:198:17: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'long unsigned int *' extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); ^~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from ./arch/parisc/include/generated/asm/div64.h:1:0, from include/linux/kernel.h:149, from include/linux/list.h:8, from include/drm/drm_hashtab.h:38, from include/drm/ttm/ttm_bo_api.h:34, from drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c:32: drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c: In function 'amdgpu_ttm_io_mem_pfn': include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^ drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c:556:16: note: in expansion of macro 'do_div' page_offset = do_div(offset, size); ^~~~~~ In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/list.h:4, from include/drm/drm_hashtab.h:38, from include/drm/ttm/ttm_bo_api.h:34, from drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c:32: include/asm-generic/div64.h:220:25: warning: right shift count >= width of type [-Wshift-count-overflow] } else if (likely(((n) >> 32) == 0)) { \ ^ include/linux/compiler.h:178:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c:556:16: note: in expansion of macro 'do_div' page_offset = do_div(offset, size); ^~~~~~ In file included from ./arch/parisc/include/generated/asm/div64.h:1:0, from include/linux/kernel.h:149, from include/linux/list.h:8, from include/drm/drm_hashtab.h:38, from include/drm/ttm/ttm_bo_api.h:34, from drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c:32:

...

include/asm-generic/div64.h:224:22: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types]

__rem = __div64_32(&(n), __base); \ ^ drivers/gpu//drm/amd/amdgpu/amdgpu_ttm.c:556:16: note: in expansion of macro 'do_div' page_offset = do_div(offset, size); ^~~~~~ include/asm-generic/div64.h:198:17: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'long unsigned int *' extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); ^~~~~~~~~~ cc1: some warnings being treated as errors

vim +/do_div +556 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

540 return -EINVAL; 541 } 542 return 0; 543 } 544 545 static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) 546 { 547 } 548 549 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo, 550 unsigned long page_offset) 551 { 552 struct drm_mm_node *mm = bo->mem.mm_node; 553 uint64_t size = mm->size; 554 unsigned long offset = page_offset; 555

556 page_offset = do_div(offset, size);

557 return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start + page_offset; 558 } 559 560 /* 561 * TTM backend functions. 562 */ 563 struct amdgpu_ttm_gup_task_list { 564 struct list_head list;

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