tree: git://people.freedesktop.org/~agd5f/linux.git drm-next-4.12-wip
head: a738ad6108435367c1d7f1a4a499bebdd26c375e
commit: 38574a66e897b70bbdc46d9da26845caab90da13 [38/69] drm/amdgpu: fix 64bit
division
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 4.9.0
reproduce:
wget
https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 38574a66e897b70bbdc46d9da26845caab90da13
# save the attached .config to linux build tree
make.cross ARCH=xtensa
All warnings (new ones prefixed by >>):
In file included from ./arch/xtensa/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);
^
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:556:2: warning: right shift count >=
>> width of type
page_offset = do_div(offset, size);
^
In file included from ./arch/xtensa/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:224:11: warning: passing argument 1 of
'__div64_32' from incompatible pointer type
__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 *' but argument
is of type 'long unsigned int *'
extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
^
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;
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
Description: application/gzip
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