12:49 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: aa515cdce7a151dcc14b7600d33f1414c6fa32c9
commit: ede6b6bc43c68ef030f88235e91e85939b8bdb49 [1162/2798] drm/radeon: use writel to
avoid gcc optimization v3
config: arm-randconfig-s031-20210113 (attached as .config)
compiler: arm-linux-gnueabi-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: v0.6.3-208-g46a52ca4-dirty
#
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi...
git remote add linux-next
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout ede6b6bc43c68ef030f88235e91e85939b8bdb49
# 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=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
"sparse warnings: (new ones prefixed by >>)"
drivers/gpu/drm/radeon/radeon_uvd.c:155:37: sparse: sparse: cast to restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:156:42: sparse: sparse: cast to restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:157:42: sparse: sparse: cast to restricted __le32
> drivers/gpu/drm/radeon/radeon_uvd.c:794:9: sparse: sparse: cast
from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:796:9: sparse: sparse:
cast from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:801:9: sparse: sparse: cast from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:802:9: sparse: sparse: cast from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:804:9: sparse: sparse: cast from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:830:9: sparse: sparse: cast from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:831:9: sparse: sparse: cast from restricted __le32
drivers/gpu/drm/radeon/radeon_uvd.c:832:9: sparse: sparse: cast from restricted __le32
vim +794 drivers/gpu/drm/radeon/radeon_uvd.c
771
772 /*
773 * multiple fence commands without any stream commands in between can
774 * crash the vcpu so just try to emmit a dummy create/destroy msg to
775 * avoid this
776 */
777 int radeon_uvd_get_create_msg(struct radeon_device *rdev, int ring,
778 uint32_t handle, struct radeon_fence **fence)
779 {
780 /* we use the last page of the vcpu bo for the UVD message */
781 uint64_t offs = radeon_bo_size(rdev->uvd.vcpu_bo) -
782 RADEON_GPU_PAGE_SIZE;
783
784 uint32_t __iomem *msg = (void __iomem *)(rdev->uvd.cpu_addr + offs);
785 uint64_t addr = rdev->uvd.gpu_addr + offs;
786
787 int r, i;
788
789 r = radeon_bo_reserve(rdev->uvd.vcpu_bo, true);
790 if (r)
791 return r;
792
793 /* stitch together an UVD create msg */
794 writel(cpu_to_le32(0x00000de4), &msg[0]);
795 writel(0x0, (void __iomem *)&msg[1]);
796 writel(cpu_to_le32(handle), &msg[2]);
797 writel(0x0, &msg[3]);
798 writel(0x0, &msg[4]);
799 writel(0x0, &msg[5]);
800 writel(0x0, &msg[6]);
801 writel(cpu_to_le32(0x00000780), &msg[7]);
802 writel(cpu_to_le32(0x00000440), &msg[8]);
803 writel(0x0, &msg[9]);
804 writel(cpu_to_le32(0x01b37000), &msg[10]);
805 for (i = 11; i < 1024; ++i)
806 writel(0x0, &msg[i]);
807
808 r = radeon_uvd_send_msg(rdev, ring, addr, fence);
809 radeon_bo_unreserve(rdev->uvd.vcpu_bo);
810 return r;
811 }
812
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org