[PATCH v2 1/7] drm/panthor: Add support for atomic page table updates
kernel test robot
lkp at intel.com
Fri Jul 4 08:24:14 UTC 2025
Hi Caterina,
kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-xe/drm-xe-next]
[also build test WARNING on linus/master v6.16-rc4 next-20250703]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Caterina-Shablia/drm-gpuvm-Kill-drm_gpuva_init/20250704-002914
base: https://gitlab.freedesktop.org/drm/xe/kernel.git drm-xe-next
patch link: https://lore.kernel.org/r/20250703152908.16702-3-caterina.shablia%40collabora.com
patch subject: [PATCH v2 1/7] drm/panthor: Add support for atomic page table updates
config: x86_64-buildonly-randconfig-004-20250704 (https://download.01.org/0day-ci/archive/20250704/202507041635.WyDu3TQ1-lkp@intel.com/config)
compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250704/202507041635.WyDu3TQ1-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507041635.WyDu3TQ1-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/panthor/panthor_mmu.c:1685:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
1685 | if (vm->as.id >= 0) {
| ^~~~~~~~~~~~~~
drivers/gpu/drm/panthor/panthor_mmu.c:1691:9: note: uninitialized use occurs here
1691 | return ret;
| ^~~
drivers/gpu/drm/panthor/panthor_mmu.c:1685:2: note: remove the 'if' if its condition is always true
1685 | if (vm->as.id >= 0) {
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/panthor/panthor_mmu.c:1679:9: note: initialize the variable 'ret' to silence this warning
1679 | int ret;
| ^
| = 0
1 warning generated.
vim +1685 drivers/gpu/drm/panthor/panthor_mmu.c
1675
1676 static int panthor_vm_lock_region(struct panthor_vm *vm, u64 start, u64 size)
1677 {
1678 struct panthor_device *ptdev = vm->ptdev;
1679 int ret;
1680
1681 mutex_lock(&ptdev->mmu->as.slots_lock);
1682 drm_WARN_ON(&ptdev->base, vm->locked_region.start || vm->locked_region.size);
1683 vm->locked_region.start = start;
1684 vm->locked_region.size = size;
> 1685 if (vm->as.id >= 0) {
1686 lock_region(ptdev, vm->as.id, start, size);
1687 ret = wait_ready(ptdev, vm->as.id);
1688 }
1689 mutex_unlock(&ptdev->mmu->as.slots_lock);
1690
1691 return ret;
1692 }
1693
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
More information about the dri-devel
mailing list