lkml.org 
[lkml]   [2020]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectdrivers/gpu/drm/exynos/exynos_drm_gem.c:62:36: sparse: sparse: incorrect type in assignment (different address spaces)
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: dcb7fd82c75ee2d6e6f9d8cc71c52519ed52e258
commit: 9940d9d93406f41ad4dc69fa2cda1e059a7ca108 drm/exynos: gem: Get rid of the internal 'pages' array
date: 7 weeks ago
config: arm64-randconfig-s032-20200706 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.2-14-g8fce3d7a-dirty
git checkout 9940d9d93406f41ad4dc69fa2cda1e059a7ca108
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64

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


sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/exynos/exynos_drm_gem.c:62:36: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] <asn:2> *kvaddr @@ got void *cookie @@
>> drivers/gpu/drm/exynos/exynos_drm_gem.c:62:36: sparse: expected void [noderef] <asn:2> *kvaddr
>> drivers/gpu/drm/exynos/exynos_drm_gem.c:62:36: sparse: got void *cookie

vim +62 drivers/gpu/drm/exynos/exynos_drm_gem.c

19
20 static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem, bool kvmap)
21 {
22 struct drm_device *dev = exynos_gem->base.dev;
23 unsigned long attr = 0;
24
25 if (exynos_gem->dma_addr) {
26 DRM_DEV_DEBUG_KMS(to_dma_dev(dev), "already allocated.\n");
27 return 0;
28 }
29
30 /*
31 * if EXYNOS_BO_CONTIG, fully physically contiguous memory
32 * region will be allocated else physically contiguous
33 * as possible.
34 */
35 if (!(exynos_gem->flags & EXYNOS_BO_NONCONTIG))
36 attr |= DMA_ATTR_FORCE_CONTIGUOUS;
37
38 /*
39 * if EXYNOS_BO_WC or EXYNOS_BO_NONCACHABLE, writecombine mapping
40 * else cachable mapping.
41 */
42 if (exynos_gem->flags & EXYNOS_BO_WC ||
43 !(exynos_gem->flags & EXYNOS_BO_CACHABLE))
44 attr |= DMA_ATTR_WRITE_COMBINE;
45 else
46 attr |= DMA_ATTR_NON_CONSISTENT;
47
48 /* FBDev emulation requires kernel mapping */
49 if (!kvmap)
50 attr |= DMA_ATTR_NO_KERNEL_MAPPING;
51
52 exynos_gem->dma_attrs = attr;
53 exynos_gem->cookie = dma_alloc_attrs(to_dma_dev(dev), exynos_gem->size,
54 &exynos_gem->dma_addr, GFP_KERNEL,
55 exynos_gem->dma_attrs);
56 if (!exynos_gem->cookie) {
57 DRM_DEV_ERROR(to_dma_dev(dev), "failed to allocate buffer.\n");
58 return -ENOMEM;
59 }
60
61 if (kvmap)
> 62 exynos_gem->kvaddr = exynos_gem->cookie;
63
64 DRM_DEV_DEBUG_KMS(to_dma_dev(dev), "dma_addr(0x%lx), size(0x%lx)\n",
65 (unsigned long)exynos_gem->dma_addr, exynos_gem->size);
66 return 0;
67 }
68

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[unhandled content-type:application/gzip]
\
 
 \ /
  Last update: 2020-07-06 19:25    [W:0.041 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site