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* [linux-next:master 2717/5111] drivers/gpu/drm/i915/gt/intel_region_lmem.c:42 init_fake_lmem_bar() warn: should 'n << 12' be a 64 bit
@ 2021-01-21 18:33 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-01-21 18:33 UTC (permalink / raw)
  To: kbuild

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CC: kbuild-all(a)lists.01.org
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Matthew Auld <matthew.auld@intel.com>
CC: Chris Wilson <chris@chris-wilson.co.uk>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   bc085f8fc88fc16796c9f2364e2bfb3fef305cad
commit: f178b89743867255b3946b40b640f379c3961c09 [2717/5111] drm/i915: move region_lmem under gt
:::::: branch date: 11 hours ago
:::::: commit date: 9 days ago
config: i386-randconfig-m021-20210121 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
drivers/gpu/drm/i915/gt/intel_region_lmem.c:42 init_fake_lmem_bar() warn: should 'n << 12' be a 64 bit type?

vim +42 drivers/gpu/drm/i915/gt/intel_region_lmem.c

b908be543e444147 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-25  11  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  12  static int init_fake_lmem_bar(struct intel_memory_region *mem)
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  13  {
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  14  	struct drm_i915_private *i915 = mem->i915;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  15  	struct i915_ggtt *ggtt = &i915->ggtt;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  16  	unsigned long n;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  17  	int ret;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  18  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  19  	/* We want to 1:1 map the mappable aperture to our reserved region */
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  20  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  21  	mem->fake_mappable.start = 0;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  22  	mem->fake_mappable.size = resource_size(&mem->region);
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  23  	mem->fake_mappable.color = I915_COLOR_UNEVICTABLE;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  24  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  25  	ret = drm_mm_reserve_node(&ggtt->vm.mm, &mem->fake_mappable);
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  26  	if (ret)
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  27  		return ret;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  28  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  29  	mem->remap_addr = dma_map_resource(&i915->drm.pdev->dev,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  30  					   mem->region.start,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  31  					   mem->fake_mappable.size,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  32  					   PCI_DMA_BIDIRECTIONAL,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  33  					   DMA_ATTR_FORCE_CONTIGUOUS);
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  34  	if (dma_mapping_error(&i915->drm.pdev->dev, mem->remap_addr)) {
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  35  		drm_mm_remove_node(&mem->fake_mappable);
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  36  		return -EINVAL;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  37  	}
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  38  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  39  	for (n = 0; n < mem->fake_mappable.size >> PAGE_SHIFT; ++n) {
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  40  		ggtt->vm.insert_page(&ggtt->vm,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  41  				     mem->remap_addr + (n << PAGE_SHIFT),
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30 @42  				     n << PAGE_SHIFT,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  43  				     I915_CACHE_NONE, 0);
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  44  	}
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  45  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  46  	mem->region = (struct resource)DEFINE_RES_MEM(mem->remap_addr,
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  47  						      mem->fake_mappable.size);
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  48  
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  49  	return 0;
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  50  }
1629224324b6cab6 drivers/gpu/drm/i915/intel_region_lmem.c Matthew Auld 2019-10-30  51  

:::::: The code at line 42 was first introduced by commit
:::::: 1629224324b6cab6f7f96e839c9b57b74cfd8349 drm/i915/lmem: add the fake lmem region

:::::: TO: Matthew Auld <matthew.auld@intel.com>
:::::: CC: Chris Wilson <chris@chris-wilson.co.uk>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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2021-01-21 18:33 [linux-next:master 2717/5111] drivers/gpu/drm/i915/gt/intel_region_lmem.c:42 init_fake_lmem_bar() warn: should 'n << 12' be a 64 bit kernel test robot

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