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authorChristian König <christian.koenig@amd.com>2019-08-05 12:16:12 +0300
committerChristian König <christian.koenig@amd.com>2019-08-10 13:49:28 +0300
commit0e1d8083bddb38b7169f6240905422f95d3c31b9 (patch)
tree9ae2b20c66c8d2fdc36e3f22b5aa8e31f4738095 /drivers/dma-buf
parentdd7a7d1ff2f199a8a80ee233480922d4f17adc6d (diff)
downloadlinux-0e1d8083bddb38b7169f6240905422f95d3c31b9.tar.xz
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
Diffstat (limited to 'drivers/dma-buf')
-rw-r--r--drivers/dma-buf/reservation.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c
index 8fcaddffd5d4..90bc6ef03598 100644
--- a/drivers/dma-buf/reservation.c
+++ b/drivers/dma-buf/reservation.c
@@ -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);