On Mon, May 24, 2021 at 03:59:50PM -0500, Jason Ekstrand wrote:
> None of these helpers actually leak any RCU details to the caller. They
> all assume you have a genuine reference, take the RCU read lock, and
> retry if needed. Naming them with an _rcu is likely to cause callers
> more panic than needed.
>
> Signed-off-by: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
> Suggested-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
scripts/get_maintainer.pl gives you ideas whom to send this to. Somewhat
applies to most patches here since I don't think you've cc'ed Christian on
the entire pile.
-Daniel
> ---
> drivers/dma-buf/dma-buf.c | 2 +-
> drivers/dma-buf/dma-resv.c | 28 +++++++++----------
> drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 4 +--
> drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 8 +++---
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
> drivers/gpu/drm/drm_gem.c | 6 ++--
> drivers/gpu/drm/drm_gem_atomic_helper.c | 2 +-
> drivers/gpu/drm/etnaviv/etnaviv_gem.c | 4 +--
> drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 4 +--
> drivers/gpu/drm/i915/display/intel_display.c | 2 +-
> drivers/gpu/drm/i915/dma_resv_utils.c | 2 +-
> drivers/gpu/drm/i915/gem/i915_gem_busy.c | 2 +-
> .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 +-
> drivers/gpu/drm/i915/gem/i915_gem_object.h | 2 +-
> drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 2 +-
> drivers/gpu/drm/i915/gem/i915_gem_wait.c | 10 +++----
> drivers/gpu/drm/i915/i915_request.c | 4 +--
> drivers/gpu/drm/i915/i915_sw_fence.c | 4 +--
> drivers/gpu/drm/msm/msm_gem.c | 2 +-
> drivers/gpu/drm/nouveau/dispnv50/wndw.c | 2 +-
> drivers/gpu/drm/nouveau/nouveau_gem.c | 2 +-
> drivers/gpu/drm/panfrost/panfrost_drv.c | 2 +-
> drivers/gpu/drm/panfrost/panfrost_job.c | 2 +-
> drivers/gpu/drm/radeon/radeon_gem.c | 6 ++--
> drivers/gpu/drm/radeon/radeon_mn.c | 2 +-
> drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++----
> drivers/gpu/drm/vgem/vgem_fence.c | 2 +-
> drivers/gpu/drm/virtio/virtgpu_ioctl.c | 4 +--
> drivers/gpu/drm/vmwgfx/vmwgfx_bo.c | 2 +-
> include/linux/dma-resv.h | 18 ++++++------
> 36 files changed, 79 insertions(+), 79 deletions(-)
>
> diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
> index f264b70c383eb..d4529aa9d1a5a 100644
> --- a/drivers/dma-buf/dma-buf.c
> +++ b/drivers/dma-buf/dma-buf.c
> @@ -1147,7 +1147,7 @@ static int __dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
> long ret;
>
> /* Wait on any implicit rendering fences */
> - ret = dma_resv_wait_timeout_rcu(resv, write, true,
> + ret = dma_resv_wait_timeout_unlocked(resv, write, true,
> MAX_SCHEDULE_TIMEOUT);
> if (ret < 0)
> return ret;
> diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
> index 6ddbeb5dfbf65..d6f1ed4cd4d55 100644
> --- a/drivers/dma-buf/dma-resv.c
> +++ b/drivers/dma-buf/dma-resv.c
> @@ -417,7 +417,7 @@ int dma_resv_copy_fences(struct dma_resv *dst, struct dma_resv *src)
> EXPORT_SYMBOL(dma_resv_copy_fences);
>
> /**
> - * dma_resv_get_fences_rcu - Get an object's shared and exclusive
> + * dma_resv_get_fences_unlocked - Get an object's shared and exclusive
> * fences without update side lock held
> * @obj: the reservation object
> * @pfence_excl: the returned exclusive fence (or NULL)
> @@ -429,10 +429,10 @@ EXPORT_SYMBOL(dma_resv_copy_fences);
> * exclusive fence is not specified the fence is put into the array of the
> * shared fences as well. Returns either zero or -ENOMEM.
> */
> -int dma_resv_get_fences_rcu(struct dma_resv *obj,
> - struct dma_fence **pfence_excl,
> - unsigned *pshared_count,
> - struct dma_fence ***pshared)
> +int dma_resv_get_fences_unlocked(struct dma_resv *obj,
> + struct dma_fence **pfence_excl,
> + unsigned *pshared_count,
> + struct dma_fence ***pshared)
> {
> struct dma_fence **shared = NULL;
> struct dma_fence *fence_excl;
> @@ -515,10 +515,10 @@ int dma_resv_get_fences_rcu(struct dma_resv *obj,
> *pshared = shared;
> return ret;
> }
> -EXPORT_SYMBOL_GPL(dma_resv_get_fences_rcu);
> +EXPORT_SYMBOL_GPL(dma_resv_get_fences_unlocked);
>
> /**
> - * dma_resv_wait_timeout_rcu - Wait on reservation's objects
> + * dma_resv_wait_timeout_unlocked - Wait on reservation's objects
> * shared and/or exclusive fences.
> * @obj: the reservation object
> * @wait_all: if true, wait on all fences, else wait on just exclusive fence
> @@ -529,9 +529,9 @@ EXPORT_SYMBOL_GPL(dma_resv_get_fences_rcu);
> * Returns -ERESTARTSYS if interrupted, 0 if the wait timed out, or
> * greater than zer on success.
> */
> -long dma_resv_wait_timeout_rcu(struct dma_resv *obj,
> - bool wait_all, bool intr,
> - unsigned long timeout)
> +long dma_resv_wait_timeout_unlocked(struct dma_resv *obj,
> + bool wait_all, bool intr,
> + unsigned long timeout)
> {
> struct dma_fence *fence;
> unsigned seq, shared_count;
> @@ -602,7 +602,7 @@ long dma_resv_wait_timeout_rcu(struct dma_resv *obj,
> rcu_read_unlock();
> goto retry;
> }
> -EXPORT_SYMBOL_GPL(dma_resv_wait_timeout_rcu);
> +EXPORT_SYMBOL_GPL(dma_resv_wait_timeout_unlocked);
>
>
> static inline int dma_resv_test_signaled_single(struct dma_fence *passed_fence)
> @@ -622,7 +622,7 @@ static inline int dma_resv_test_signaled_single(struct dma_fence *passed_fence)
> }
>
> /**
> - * dma_resv_test_signaled_rcu - Test if a reservation object's
> + * dma_resv_test_signaled_unlocked - Test if a reservation object's
> * fences have been signaled.
> * @obj: the reservation object
> * @test_all: if true, test all fences, otherwise only test the exclusive
> @@ -631,7 +631,7 @@ static inline int dma_resv_test_signaled_single(struct dma_fence *passed_fence)
> * RETURNS
> * true if all fences signaled, else false
> */
> -bool dma_resv_test_signaled_rcu(struct dma_resv *obj, bool test_all)
> +bool dma_resv_test_signaled_unlocked(struct dma_resv *obj, bool test_all)
> {
> unsigned seq, shared_count;
> int ret;
> @@ -680,4 +680,4 @@ bool dma_resv_test_signaled_rcu(struct dma_resv *obj, bool test_all)
> rcu_read_unlock();
> return ret;
> }
> -EXPORT_SYMBOL_GPL(dma_resv_test_signaled_rcu);
> +EXPORT_SYMBOL_GPL(dma_resv_test_signaled_unlocked);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> index 8a1fb8b6606e5..3b0df434e0ca3 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> @@ -203,7 +203,7 @@ int amdgpu_display_crtc_page_flip_target(struct drm_crtc *crtc,
> goto unpin;
> }
>
> - r = dma_resv_get_fences_rcu(new_abo->tbo.base.resv, &work->excl,
> + r = dma_resv_get_fences_unlocked(new_abo->tbo.base.resv, &work->excl,
> &work->shared_count,
> &work->shared);
> if (unlikely(r != 0)) {
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
> index baa980a477d94..0d0319bc51577 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
> @@ -98,7 +98,7 @@ __dma_resv_make_exclusive(struct dma_resv *obj)
> if (!dma_resv_get_list(obj)) /* no shared fences to convert */
> return 0;
>
> - r = dma_resv_get_fences_rcu(obj, NULL, &count, &fences);
> + r = dma_resv_get_fences_unlocked(obj, NULL, &count, &fences);
> if (r)
> return r;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index 18974bd081f00..a71f98ae1d72f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -471,7 +471,7 @@ int amdgpu_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
> return -ENOENT;
> }
> robj = gem_to_amdgpu_bo(gobj);
> - ret = dma_resv_wait_timeout_rcu(robj->tbo.base.resv, true, true,
> + ret = dma_resv_wait_timeout_unlocked(robj->tbo.base.resv, true, true,
> timeout);
>
> /* ret == 0 means not signaled,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
> index b4971e90b98cf..7045b104a33ae 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
> @@ -112,7 +112,7 @@ void amdgpu_pasid_free_delayed(struct dma_resv *resv,
> unsigned count;
> int r;
>
> - r = dma_resv_get_fences_rcu(resv, NULL, &count, &fences);
> + r = dma_resv_get_fences_unlocked(resv, NULL, &count, &fences);
> if (r)
> goto fallback;
>
> @@ -156,7 +156,7 @@ void amdgpu_pasid_free_delayed(struct dma_resv *resv,
> /* Not enough memory for the delayed delete, as last resort
> * block for all the fences to complete.
> */
> - dma_resv_wait_timeout_rcu(resv, true, false,
> + dma_resv_wait_timeout_unlocked(resv, true, false,
> MAX_SCHEDULE_TIMEOUT);
> amdgpu_pasid_free(pasid);
> }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
> index 828b5167ff128..58fb1de81c0c5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
> @@ -75,7 +75,7 @@ static bool amdgpu_mn_invalidate_gfx(struct mmu_interval_notifier *mni,
>
> mmu_interval_set_seq(mni, cur_seq);
>
> - r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv, true, false,
> + r = dma_resv_wait_timeout_unlocked(bo->tbo.base.resv, true, false,
> MAX_SCHEDULE_TIMEOUT);
> mutex_unlock(&adev->notifier_lock);
> if (r <= 0)
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 0adffcace3263..81db9ea391c1c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -791,7 +791,7 @@ int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
> return 0;
> }
>
> - r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv, false, false,
> + r = dma_resv_wait_timeout_unlocked(bo->tbo.base.resv, false, false,
> MAX_SCHEDULE_TIMEOUT);
> if (r < 0)
> return r;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> index c6dbc08016045..af7b667d3226d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> @@ -1115,7 +1115,7 @@ static int amdgpu_uvd_send_msg(struct amdgpu_ring *ring, struct amdgpu_bo *bo,
> ib->length_dw = 16;
>
> if (direct) {
> - r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv,
> + r = dma_resv_wait_timeout_unlocked(bo->tbo.base.resv,
> true, false,
> msecs_to_jiffies(10));
> if (r == 0)
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 4a3e3f72e1277..33dbe3fcaf706 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -2007,13 +2007,13 @@ static void amdgpu_vm_prt_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
> unsigned i, shared_count;
> int r;
>
> - r = dma_resv_get_fences_rcu(resv, &excl,
> + r = dma_resv_get_fences_unlocked(resv, &excl,
> &shared_count, &shared);
> if (r) {
> /* Not enough memory to grab the fence list, as last resort
> * block for all the fences to complete.
> */
> - dma_resv_wait_timeout_rcu(resv, true, false,
> + dma_resv_wait_timeout_unlocked(resv, true, false,
> MAX_SCHEDULE_TIMEOUT);
> return;
> }
> @@ -2625,7 +2625,7 @@ bool amdgpu_vm_evictable(struct amdgpu_bo *bo)
> return true;
>
> /* Don't evict VM page tables while they are busy */
> - if (!dma_resv_test_signaled_rcu(bo->tbo.base.resv, true))
> + if (!dma_resv_test_signaled_unlocked(bo->tbo.base.resv, true))
> return false;
>
> /* Try to block ongoing updates */
> @@ -2805,7 +2805,7 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
> */
> long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
> {
> - timeout = dma_resv_wait_timeout_rcu(vm->root.base.bo->tbo.base.resv,
> + timeout = dma_resv_wait_timeout_unlocked(vm->root.base.bo->tbo.base.resv,
> true, true, timeout);
> if (timeout <= 0)
> return timeout;
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 9ca517b658546..e74fef044b301 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -8276,7 +8276,7 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
> * deadlock during GPU reset when this fence will not signal
> * but we hold reservation lock for the BO.
> */
> - r = dma_resv_wait_timeout_rcu(abo->tbo.base.resv, true,
> + r = dma_resv_wait_timeout_unlocked(abo->tbo.base.resv, true,
> false,
> msecs_to_jiffies(5000));
> if (unlikely(r <= 0))
> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
> index 9989425e9875a..42a432708c2fe 100644
> --- a/drivers/gpu/drm/drm_gem.c
> +++ b/drivers/gpu/drm/drm_gem.c
> @@ -770,7 +770,7 @@ long drm_gem_dma_resv_wait(struct drm_file *filep, u32 handle,
> return -EINVAL;
> }
>
> - ret = dma_resv_wait_timeout_rcu(obj->resv, wait_all,
> + ret = dma_resv_wait_timeout_unlocked(obj->resv, wait_all,
> true, timeout);
> if (ret == 0)
> ret = -ETIME;
> @@ -1375,12 +1375,12 @@ int drm_gem_fence_array_add_implicit(struct xarray *fence_array,
>
> if (!write) {
> struct dma_fence *fence =
> - dma_resv_get_excl_rcu(obj->resv);
> + dma_resv_get_excl_unlocked(obj->resv);
>
> return drm_gem_fence_array_add(fence_array, fence);
> }
>
> - ret = dma_resv_get_fences_rcu(obj->resv, NULL,
> + ret = dma_resv_get_fences_unlocked(obj->resv, NULL,
> &fence_count, &fences);
> if (ret || !fence_count)
> return ret;
> diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c
> index a005c5a0ba46a..a27135084ae5c 100644
> --- a/drivers/gpu/drm/drm_gem_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c
> @@ -147,7 +147,7 @@ int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_st
> return 0;
>
> obj = drm_gem_fb_get_obj(state->fb, 0);
> - fence = dma_resv_get_excl_rcu(obj->resv);
> + fence = dma_resv_get_excl_unlocked(obj->resv);
> drm_atomic_set_fence_for_plane(state, fence);
>
> return 0;
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> index db69f19ab5bca..b271e00480246 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> @@ -390,13 +390,13 @@ int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
> }
>
> if (op & ETNA_PREP_NOSYNC) {
> - if (!dma_resv_test_signaled_rcu(obj->resv,
> + if (!dma_resv_test_signaled_unlocked(obj->resv,
> write))
> return -EBUSY;
> } else {
> unsigned long remain = etnaviv_timeout_to_jiffies(timeout);
>
> - ret = dma_resv_wait_timeout_rcu(obj->resv,
> + ret = dma_resv_wait_timeout_unlocked(obj->resv,
> write, true, remain);
> if (ret <= 0)
> return ret == 0 ? -ETIMEDOUT : ret;
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> index d05c359945799..b4ac4c7ab144d 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
> @@ -189,13 +189,13 @@ static int submit_fence_sync(struct etnaviv_gem_submit *submit)
> continue;
>
> if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
> - ret = dma_resv_get_fences_rcu(robj, &bo->excl,
> + ret = dma_resv_get_fences_unlocked(robj, &bo->excl,
> &bo->nr_shared,
> &bo->shared);
> if (ret)
> return ret;
> } else {
> - bo->excl = dma_resv_get_excl_rcu(robj);
> + bo->excl = dma_resv_get_excl_unlocked(robj);
> }
>
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 422b59ebf6dce..5f0b85a102159 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -11040,7 +11040,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane,
> if (ret < 0)
> goto unpin_fb;
>
> - fence = dma_resv_get_excl_rcu(obj->base.resv);
> + fence = dma_resv_get_excl_unlocked(obj->base.resv);
> if (fence) {
> add_rps_boost_after_vblank(new_plane_state->hw.crtc,
> fence);
> diff --git a/drivers/gpu/drm/i915/dma_resv_utils.c b/drivers/gpu/drm/i915/dma_resv_utils.c
> index 9e508e7d4629f..bdfc6bf16a4e9 100644
> --- a/drivers/gpu/drm/i915/dma_resv_utils.c
> +++ b/drivers/gpu/drm/i915/dma_resv_utils.c
> @@ -10,7 +10,7 @@
> void dma_resv_prune(struct dma_resv *resv)
> {
> if (dma_resv_trylock(resv)) {
> - if (dma_resv_test_signaled_rcu(resv, true))
> + if (dma_resv_test_signaled_unlocked(resv, true))
> dma_resv_add_excl_fence(resv, NULL);
> dma_resv_unlock(resv);
> }
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_busy.c b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> index 25235ef630c10..754ad6d1bace9 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_busy.c
> @@ -105,7 +105,7 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
> * Alternatively, we can trade that extra information on read/write
> * activity with
> * args->busy =
> - * !dma_resv_test_signaled_rcu(obj->resv, true);
> + * !dma_resv_test_signaled_unlocked(obj->resv, true);
> * to report the overall busyness. This is what the wait-ioctl does.
> *
> */
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> index 297143511f99b..e8f323564e57b 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> @@ -1481,7 +1481,7 @@ static inline bool use_reloc_gpu(struct i915_vma *vma)
> if (DBG_FORCE_RELOC)
> return false;
>
> - return !dma_resv_test_signaled_rcu(vma->resv, true);
> + return !dma_resv_test_signaled_unlocked(vma->resv, true);
> }
>
> static unsigned long vma_phys_addr(struct i915_vma *vma, u32 offset)
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> index 2ebd79537aea9..7c0eb425cb3b3 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> @@ -500,7 +500,7 @@ i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
> struct dma_fence *fence;
>
> rcu_read_lock();
> - fence = dma_resv_get_excl_rcu(obj->base.resv);
> + fence = dma_resv_get_excl_unlocked(obj->base.resv);
> rcu_read_unlock();
>
> if (fence && dma_fence_is_i915(fence) && !dma_fence_is_signaled(fence))
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
> index a657b99ec7606..bb5f44ed932aa 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
> @@ -85,7 +85,7 @@ static bool i915_gem_userptr_invalidate(struct mmu_interval_notifier *mni,
> return true;
>
> /* we will unbind on next submission, still have userptr pins */
> - r = dma_resv_wait_timeout_rcu(obj->base.resv, true, false,
> + r = dma_resv_wait_timeout_unlocked(obj->base.resv, true, false,
> MAX_SCHEDULE_TIMEOUT);
> if (r <= 0)
> drm_err(&i915->drm, "(%ld) failed to wait for idle\n", r);
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_wait.c b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> index 4b9856d5ba14f..5b6c52659ad4d 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> @@ -45,7 +45,7 @@ i915_gem_object_wait_reservation(struct dma_resv *resv,
> unsigned int count, i;
> int ret;
>
> - ret = dma_resv_get_fences_rcu(resv, &excl, &count, &shared);
> + ret = dma_resv_get_fences_unlocked(resv, &excl, &count, &shared);
> if (ret)
> return ret;
>
> @@ -73,7 +73,7 @@ i915_gem_object_wait_reservation(struct dma_resv *resv,
> */
> prune_fences = count && timeout >= 0;
> } else {
> - excl = dma_resv_get_excl_rcu(resv);
> + excl = dma_resv_get_excl_unlocked(resv);
> }
>
> if (excl && timeout >= 0)
> @@ -158,8 +158,8 @@ i915_gem_object_wait_priority(struct drm_i915_gem_object *obj,
> unsigned int count, i;
> int ret;
>
> - ret = dma_resv_get_fences_rcu(obj->base.resv,
> - &excl, &count, &shared);
> + ret = dma_resv_get_fences_unlocked(obj->base.resv,
> + &excl, &count, &shared);
> if (ret)
> return ret;
>
> @@ -170,7 +170,7 @@ i915_gem_object_wait_priority(struct drm_i915_gem_object *obj,
>
> kfree(shared);
> } else {
> - excl = dma_resv_get_excl_rcu(obj->base.resv);
> + excl = dma_resv_get_excl_unlocked(obj->base.resv);
> }
>
> if (excl) {
> diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
> index 970d8f4986bbe..d101d702fbadc 100644
> --- a/drivers/gpu/drm/i915/i915_request.c
> +++ b/drivers/gpu/drm/i915/i915_request.c
> @@ -1594,7 +1594,7 @@ i915_request_await_object(struct i915_request *to,
> struct dma_fence **shared;
> unsigned int count, i;
>
> - ret = dma_resv_get_fences_rcu(obj->base.resv,
> + ret = dma_resv_get_fences_unlocked(obj->base.resv,
> &excl, &count, &shared);
> if (ret)
> return ret;
> @@ -1611,7 +1611,7 @@ i915_request_await_object(struct i915_request *to,
> dma_fence_put(shared[i]);
> kfree(shared);
> } else {
> - excl = dma_resv_get_excl_rcu(obj->base.resv);
> + excl = dma_resv_get_excl_unlocked(obj->base.resv);
> }
>
> if (excl) {
> diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c
> index 2744558f30507..0bcb7ea44201e 100644
> --- a/drivers/gpu/drm/i915/i915_sw_fence.c
> +++ b/drivers/gpu/drm/i915/i915_sw_fence.c
> @@ -582,7 +582,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
> struct dma_fence **shared;
> unsigned int count, i;
>
> - ret = dma_resv_get_fences_rcu(resv, &excl, &count, &shared);
> + ret = dma_resv_get_fences_unlocked(resv, &excl, &count, &shared);
> if (ret)
> return ret;
>
> @@ -606,7 +606,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
> dma_fence_put(shared[i]);
> kfree(shared);
> } else {
> - excl = dma_resv_get_excl_rcu(resv);
> + excl = dma_resv_get_excl_unlocked(resv);
> }
>
> if (ret >= 0 && excl && excl->ops != exclude) {
> diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> index 56df86e5f7400..f8afb081770e4 100644
> --- a/drivers/gpu/drm/msm/msm_gem.c
> +++ b/drivers/gpu/drm/msm/msm_gem.c
> @@ -915,7 +915,7 @@ int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
> op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
> long ret;
>
> - ret = dma_resv_wait_timeout_rcu(obj->resv, write,
> + ret = dma_resv_wait_timeout_unlocked(obj->resv, write,
> true, remain);
> if (ret == 0)
> return remain == 0 ? -EBUSY : -ETIMEDOUT;
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> index 0cb1f9d848d3e..8d048bacd6f02 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
> @@ -561,7 +561,7 @@ nv50_wndw_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state)
> asyw->image.handle[0] = ctxdma->object.handle;
> }
>
> - asyw->state.fence = dma_resv_get_excl_rcu(nvbo->bo.base.resv);
> + asyw->state.fence = dma_resv_get_excl_unlocked(nvbo->bo.base.resv);
> asyw->image.offset[0] = nvbo->offset;
>
> if (wndw->func->prepare) {
> diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
> index a70e82413fa75..06ea1fed02467 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_gem.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
> @@ -928,7 +928,7 @@ nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
> return -ENOENT;
> nvbo = nouveau_gem_object(gem);
>
> - lret = dma_resv_wait_timeout_rcu(nvbo->bo.base.resv, write, true,
> + lret = dma_resv_wait_timeout_unlocked(nvbo->bo.base.resv, write, true,
> no_wait ? 0 : 30 * HZ);
> if (!lret)
> ret = -EBUSY;
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index ca07098a61419..53e1842fe8bf8 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -311,7 +311,7 @@ panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
> if (!gem_obj)
> return -ENOENT;
>
> - ret = dma_resv_wait_timeout_rcu(gem_obj->resv, true,
> + ret = dma_resv_wait_timeout_unlocked(gem_obj->resv, true,
> true, timeout);
> if (!ret)
> ret = timeout ? -ETIMEDOUT : -EBUSY;
> diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
> index 6003cfeb13221..2df3e999a38d0 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_job.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_job.c
> @@ -203,7 +203,7 @@ static void panfrost_acquire_object_fences(struct drm_gem_object **bos,
> int i;
>
> for (i = 0; i < bo_count; i++)
> - implicit_fences[i] = dma_resv_get_excl_rcu(bos[i]->resv);
> + implicit_fences[i] = dma_resv_get_excl_unlocked(bos[i]->resv);
> }
>
> static void panfrost_attach_object_fences(struct drm_gem_object **bos,
> diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
> index 05ea2f39f6261..1a38b0bf36d11 100644
> --- a/drivers/gpu/drm/radeon/radeon_gem.c
> +++ b/drivers/gpu/drm/radeon/radeon_gem.c
> @@ -125,7 +125,7 @@ static int radeon_gem_set_domain(struct drm_gem_object *gobj,
> }
> if (domain == RADEON_GEM_DOMAIN_CPU) {
> /* Asking for cpu access wait for object idle */
> - r = dma_resv_wait_timeout_rcu(robj->tbo.base.resv, true, true, 30 * HZ);
> + r = dma_resv_wait_timeout_unlocked(robj->tbo.base.resv, true, true, 30 * HZ);
> if (!r)
> r = -EBUSY;
>
> @@ -474,7 +474,7 @@ int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
> }
> robj = gem_to_radeon_bo(gobj);
>
> - r = dma_resv_test_signaled_rcu(robj->tbo.base.resv, true);
> + r = dma_resv_test_signaled_unlocked(robj->tbo.base.resv, true);
> if (r == 0)
> r = -EBUSY;
> else
> @@ -503,7 +503,7 @@ int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
> }
> robj = gem_to_radeon_bo(gobj);
>
> - ret = dma_resv_wait_timeout_rcu(robj->tbo.base.resv, true, true, 30 * HZ);
> + ret = dma_resv_wait_timeout_unlocked(robj->tbo.base.resv, true, true, 30 * HZ);
> if (ret == 0)
> r = -EBUSY;
> else if (ret < 0)
> diff --git a/drivers/gpu/drm/radeon/radeon_mn.c b/drivers/gpu/drm/radeon/radeon_mn.c
> index e37c9a57a7c36..8016c9e568684 100644
> --- a/drivers/gpu/drm/radeon/radeon_mn.c
> +++ b/drivers/gpu/drm/radeon/radeon_mn.c
> @@ -66,7 +66,7 @@ static bool radeon_mn_invalidate(struct mmu_interval_notifier *mn,
> return true;
> }
>
> - r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv, true, false,
> + r = dma_resv_wait_timeout_unlocked(bo->tbo.base.resv, true, false,
> MAX_SCHEDULE_TIMEOUT);
> if (r <= 0)
> DRM_ERROR("(%ld) failed to wait for user bo\n", r);
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index ca1b098b6a561..6925de3f179e8 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -294,7 +294,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
> struct dma_resv *resv = &bo->base._resv;
> int ret;
>
> - if (dma_resv_test_signaled_rcu(resv, true))
> + if (dma_resv_test_signaled_unlocked(resv, true))
> ret = 0;
> else
> ret = -EBUSY;
> @@ -306,7 +306,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
> dma_resv_unlock(bo->base.resv);
> spin_unlock(&bo->bdev->lru_lock);
>
> - lret = dma_resv_wait_timeout_rcu(resv, true, interruptible,
> + lret = dma_resv_wait_timeout_unlocked(resv, true, interruptible,
> 30 * HZ);
>
> if (lret < 0)
> @@ -409,7 +409,7 @@ static void ttm_bo_release(struct kref *kref)
> /* Last resort, if we fail to allocate memory for the
> * fences block for the BO to become idle
> */
> - dma_resv_wait_timeout_rcu(bo->base.resv, true, false,
> + dma_resv_wait_timeout_unlocked(bo->base.resv, true, false,
> 30 * HZ);
> }
>
> @@ -420,7 +420,7 @@ static void ttm_bo_release(struct kref *kref)
> ttm_mem_io_free(bdev, &bo->mem);
> }
>
> - if (!dma_resv_test_signaled_rcu(bo->base.resv, true) ||
> + if (!dma_resv_test_signaled_unlocked(bo->base.resv, true) ||
> !dma_resv_trylock(bo->base.resv)) {
> /* The BO is not idle, resurrect it for delayed destroy */
> ttm_bo_flush_all_fences(bo);
> @@ -1116,13 +1116,13 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
> long timeout = 15 * HZ;
>
> if (no_wait) {
> - if (dma_resv_test_signaled_rcu(bo->base.resv, true))
> + if (dma_resv_test_signaled_unlocked(bo->base.resv, true))
> return 0;
> else
> return -EBUSY;
> }
>
> - timeout = dma_resv_wait_timeout_rcu(bo->base.resv, true,
> + timeout = dma_resv_wait_timeout_unlocked(bo->base.resv, true,
> interruptible, timeout);
> if (timeout < 0)
> return timeout;
> diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
> index 2902dc6e64faf..110927edb9df7 100644
> --- a/drivers/gpu/drm/vgem/vgem_fence.c
> +++ b/drivers/gpu/drm/vgem/vgem_fence.c
> @@ -151,7 +151,7 @@ int vgem_fence_attach_ioctl(struct drm_device *dev,
>
> /* Check for a conflicting fence */
> resv = obj->resv;
> - if (!dma_resv_test_signaled_rcu(resv,
> + if (!dma_resv_test_signaled_unlocked(resv,
> arg->flags & VGEM_FENCE_WRITE)) {
> ret = -EBUSY;
> goto err_fence;
> diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> index 669f2ee395154..763a51686819c 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> @@ -451,9 +451,9 @@ static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
> return -ENOENT;
>
> if (args->flags & VIRTGPU_WAIT_NOWAIT) {
> - ret = dma_resv_test_signaled_rcu(obj->resv, true);
> + ret = dma_resv_test_signaled_unlocked(obj->resv, true);
> } else {
> - ret = dma_resv_wait_timeout_rcu(obj->resv, true, true,
> + ret = dma_resv_wait_timeout_unlocked(obj->resv, true, true,
> timeout);
> }
> if (ret == 0)
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
> index 04dd49c4c2572..19e1ce23842a9 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
> @@ -743,7 +743,7 @@ static int vmw_user_bo_synccpu_grab(struct vmw_user_buffer_object *user_bo,
> if (flags & drm_vmw_synccpu_allow_cs) {
> long lret;
>
> - lret = dma_resv_wait_timeout_rcu
> + lret = dma_resv_wait_timeout_unlocked
> (bo->base.resv, true, true,
> nonblock ? 0 : MAX_SCHEDULE_TIMEOUT);
> if (!lret)
> diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h
> index d44a77e8a7e34..99926680c3964 100644
> --- a/include/linux/dma-resv.h
> +++ b/include/linux/dma-resv.h
> @@ -246,7 +246,7 @@ dma_resv_get_excl(struct dma_resv *obj)
> }
>
> /**
> - * dma_resv_get_excl_rcu - get the reservation object's
> + * dma_resv_get_excl - get the reservation object's
> * exclusive fence, without lock held.
> * @obj: the reservation object
> *
> @@ -257,7 +257,7 @@ dma_resv_get_excl(struct dma_resv *obj)
> * The exclusive fence or NULL if none
> */
> static inline struct dma_fence *
> -dma_resv_get_excl_rcu(struct dma_resv *obj)
> +dma_resv_get_excl_unlocked(struct dma_resv *obj)
> {
> struct dma_fence *fence;
>
> @@ -278,16 +278,16 @@ void dma_resv_add_shared_fence(struct dma_resv *obj, struct dma_fence *fence);
>
> void dma_resv_add_excl_fence(struct dma_resv *obj, struct dma_fence *fence);
>
> -int dma_resv_get_fences_rcu(struct dma_resv *obj,
> - struct dma_fence **pfence_excl,
> - unsigned *pshared_count,
> - struct dma_fence ***pshared);
> +int dma_resv_get_fences_unlocked(struct dma_resv *obj,
> + struct dma_fence **pfence_excl,
> + unsigned *pshared_count,
> + struct dma_fence ***pshared);
>
> int dma_resv_copy_fences(struct dma_resv *dst, struct dma_resv *src);
>
> -long dma_resv_wait_timeout_rcu(struct dma_resv *obj, bool wait_all, bool intr,
> - unsigned long timeout);
> +long dma_resv_wait_timeout_unlocked(struct dma_resv *obj, bool wait_all, bool intr,
> + unsigned long timeout);
>
> -bool dma_resv_test_signaled_rcu(struct dma_resv *obj, bool test_all);
> +bool dma_resv_test_signaled_unlocked(struct dma_resv *obj, bool test_all);
>
> #endif /* _LINUX_RESERVATION_H */
> --
> 2.31.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
