Messages in this thread | | | Date | Tue, 7 Jul 2020 00:55:25 +0800 | From | kernel test robot <> | Subject | drivers/gpu/drm/exynos/exynos_drm_gem.c:62:36: sparse: sparse: incorrect type in assignment (different address spaces) |
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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
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