drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c:429:13: sparse: sparse: incompatible types in comparison expression (different address spaces):

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dd9b004b7ff3289fb7bae35130c0a5c0537266af
commit: 276e8beb2a0c390fdac8f11bb58d9fdf95a6d538 drm/amdgpu/userq: add force completion helpers
date:   4 months ago
config: parisc-randconfig-r112-20251219 (https://download.01.org/0day-ci/archive/20251220/202512202222.NmduejIx-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251220/202512202222.NmduejIx-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512202222.NmduejIx-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c: note: in included file (through drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h, drivers/gpu/drm/amd/amdgpu/amdgpu.h):
   drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h:434:49: sparse: sparse: static assertion failed: "amd_sriov_msg_vf2pf_info must be 1 KB"
>> drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c:429:13: sparse: sparse: incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c:429:13: sparse:    struct dma_fence [noderef] __rcu *
   drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c:429:13: sparse:    struct dma_fence *

vim +429 drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c

   418	
   419	static void
   420	amdgpu_userq_fence_driver_set_error(struct amdgpu_userq_fence *fence,
   421					    int error)
   422	{
   423		struct amdgpu_userq_fence_driver *fence_drv = fence->fence_drv;
   424		unsigned long flags;
   425		struct dma_fence *f;
   426	
   427		spin_lock_irqsave(&fence_drv->fence_list_lock, flags);
   428	
 > 429		f = rcu_dereference_protected(&fence->base,
   430					      lockdep_is_held(&fence_drv->fence_list_lock));
   431		if (f && !dma_fence_is_signaled_locked(f))
   432			dma_fence_set_error(f, error);
   433		spin_unlock_irqrestore(&fence_drv->fence_list_lock, flags);
   434	}
   435	

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