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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Am 06.01.24 um 00:00 schrieb Felix Kuehling: > Properly mark kfd_process->ef as __rcu and consistently use the right > accessor functions. > > Reported-by: kernel test robot > Closes: https://lore.kernel.org/oe-kbuild-all/202312052245.yFpBSgNH-lkp@intel.com/ > Signed-off-by: Felix Kuehling Reviewed-by: Christian König > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 +- > drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 4 ++-- > drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 2 +- > drivers/gpu/drm/amd/amdkfd/kfd_process.c | 7 +++++-- > 4 files changed, 9 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h > index cf6ed5fce291..f262b9d89541 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h > @@ -311,7 +311,7 @@ void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct kgd_mem *mem); > int amdgpu_amdkfd_map_gtt_bo_to_gart(struct amdgpu_device *adev, struct amdgpu_bo *bo); > > int amdgpu_amdkfd_gpuvm_restore_process_bos(void *process_info, > - struct dma_fence **ef); > + struct dma_fence __rcu **ef); > int amdgpu_amdkfd_gpuvm_get_vm_fault_info(struct amdgpu_device *adev, > struct kfd_vm_fault_info *info); > int amdgpu_amdkfd_gpuvm_import_dmabuf_fd(struct amdgpu_device *adev, int fd, > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c > index 48697b789342..5f445d856769 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c > @@ -2802,7 +2802,7 @@ static void amdgpu_amdkfd_restore_userptr_worker(struct work_struct *work) > put_task_struct(usertask); > } > > -static void replace_eviction_fence(struct dma_fence **ef, > +static void replace_eviction_fence(struct dma_fence __rcu **ef, > struct dma_fence *new_ef) > { > struct dma_fence *old_ef = rcu_replace_pointer(*ef, new_ef, true > @@ -2837,7 +2837,7 @@ static void replace_eviction_fence(struct dma_fence **ef, > * 7. Add fence to all PD and PT BOs. > * 8. Unreserve all BOs > */ > -int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef) > +int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence __rcu **ef) > { > struct amdkfd_process_info *process_info = info; > struct amdgpu_vm *peer_vm; > diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h > index 745024b31340..17fbedbf3651 100644 > --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h > +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h > @@ -917,7 +917,7 @@ struct kfd_process { > * fence will be triggered during eviction and new one will be created > * during restore > */ > - struct dma_fence *ef; > + struct dma_fence __rcu *ef; > > /* Work items for evicting and restoring BOs */ > struct delayed_work eviction_work; > diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c > index 71df51fcc1b0..717a60d7a4ea 100644 > --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c > +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c > @@ -1110,6 +1110,7 @@ static void kfd_process_wq_release(struct work_struct *work) > { > struct kfd_process *p = container_of(work, struct kfd_process, > release_work); > + struct dma_fence *ef; > > kfd_process_dequeue_from_all_devices(p); > pqm_uninit(&p->pqm); > @@ -1118,7 +1119,9 @@ static void kfd_process_wq_release(struct work_struct *work) > * destroyed. This allows any BOs to be freed without > * triggering pointless evictions or waiting for fences. > */ > - dma_fence_signal(p->ef); > + synchronize_rcu(); > + ef = rcu_access_pointer(p->ef); > + dma_fence_signal(ef); > > kfd_process_remove_sysfs(p); > > @@ -1127,7 +1130,7 @@ static void kfd_process_wq_release(struct work_struct *work) > svm_range_list_fini(p); > > kfd_process_destroy_pdds(p); > - dma_fence_put(p->ef); > + dma_fence_put(ef); > > kfd_event_free_process(p); >