redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

dma-buf: further relax reservation_object_add_shared_fence 

Other cores don't busy wait any more and we removed the last user of checking
the seqno for changes. Drop updating the number for shared fences altogether.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/322379/?series=64837&rev=1
alistair/sunxi64-5.4-dsi
Christian König 2019-08-05 11:16:12 +02:00
parent dd7a7d1ff2
commit 0e1d8083bd
2 changed files with 1 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/dma-buf/reservation.c
View File

@ -237,9 +237,6 @@ void reservation_object_add_shared_fence(struct reservation_object *obj,
fobj = reservation_object_get_list(obj);
count = fobj->shared_count;
preempt_disable();
write_seqcount_begin(&obj->seq);
for (i = 0; i < count; ++i) {
old = rcu_dereference_protected(fobj->shared[i],
@ -257,9 +254,6 @@ replace:
RCU_INIT_POINTER(fobj->shared[i], fence);
/* pointer update must be visible before we extend the shared_count */
smp_store_mb(fobj->shared_count, count);
write_seqcount_end(&obj->seq);
preempt_enable();
dma_fence_put(old);
}
EXPORT_SYMBOL(reservation_object_add_shared_fence);

7
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View File

@ -251,12 +251,7 @@ static int amdgpu_amdkfd_remove_eviction_fence(struct amdgpu_bo *bo,
new->shared_max = old->shared_max;
new->shared_count = k;
/* Install the new fence list, seqcount provides the barriers */
preempt_disable();
write_seqcount_begin(&resv->seq);
RCU_INIT_POINTER(resv->fence, new);
write_seqcount_end(&resv->seq);
preempt_enable();
rcu_assign_pointer(resv->fence, new);
/* Drop the references to the removed fences or move them to ef_list */
for (i = j, k = 0; i < old->shared_count; ++i) {