dma-buf: Rename struct fence to dma_fence

I plan to usurp the short name of struct fence for a core kernel struct,
and so I need to rename the specialised fence/timeline for DMA
operations to make room.

A consensus was reached in
https://lists.freedesktop.org/archives/dri-devel/2016-July/113083.html
that making clear this fence applies to DMA operations was a good thing.
Since then the patch has grown a bit as usage increases, so hopefully it
remains a good thing!

(v2...: rebase, rerun spatch)
v3: Compile on msm, spotted a manual fixup that I broke.
v4: Try again for msm, sorry Daniel

coccinelle script:
@@

@@
- struct fence
+ struct dma_fence
@@

@@
- struct fence_ops
+ struct dma_fence_ops
@@

@@
- struct fence_cb
+ struct dma_fence_cb
@@

@@
- struct fence_array
+ struct dma_fence_array
@@

@@
- enum fence_flag_bits
+ enum dma_fence_flag_bits
@@

@@
(
- fence_init
+ dma_fence_init
|
- fence_release
+ dma_fence_release
|
- fence_free
+ dma_fence_free
|
- fence_get
+ dma_fence_get
|
- fence_get_rcu
+ dma_fence_get_rcu
|
- fence_put
+ dma_fence_put
|
- fence_signal
+ dma_fence_signal
|
- fence_signal_locked
+ dma_fence_signal_locked
|
- fence_default_wait
+ dma_fence_default_wait
|
- fence_add_callback
+ dma_fence_add_callback
|
- fence_remove_callback
+ dma_fence_remove_callback
|
- fence_enable_sw_signaling
+ dma_fence_enable_sw_signaling
|
- fence_is_signaled_locked
+ dma_fence_is_signaled_locked
|
- fence_is_signaled
+ dma_fence_is_signaled
|
- fence_is_later
+ dma_fence_is_later
|
- fence_later
+ dma_fence_later
|
- fence_wait_timeout
+ dma_fence_wait_timeout
|
- fence_wait_any_timeout
+ dma_fence_wait_any_timeout
|
- fence_wait
+ dma_fence_wait
|
- fence_context_alloc
+ dma_fence_context_alloc
|
- fence_array_create
+ dma_fence_array_create
|
- to_fence_array
+ to_dma_fence_array
|
- fence_is_array
+ dma_fence_is_array
|
- trace_fence_emit
+ trace_dma_fence_emit
|
- FENCE_TRACE
+ DMA_FENCE_TRACE
|
- FENCE_WARN
+ DMA_FENCE_WARN
|
- FENCE_ERR
+ DMA_FENCE_ERR
)
 (
 ...
 )

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161025120045.28839-1-chris@chris-wilson.co.uk

1 files changed, 48 insertions, 46 deletions

diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c
index 82de59f7cbbd..7ed56f3edfb7 100644
--- a/drivers/dma-buf/reservation.c
+++ b/drivers/dma-buf/reservation.c
@@ -102,17 +102,17 @@ EXPORT_SYMBOL(reservation_object_reserve_shared);
 static void
 reservation_object_add_shared_inplace(struct reservation_object *obj,
 				      struct reservation_object_list *fobj,
-				      struct fence *fence)
+				      struct dma_fence *fence)
 {
 	u32 i;
 
-	fence_get(fence);
+	dma_fence_get(fence);
 
 	preempt_disable();
 	write_seqcount_begin(&obj->seq);
 
 	for (i = 0; i < fobj->shared_count; ++i) {
-		struct fence *old_fence;
+		struct dma_fence *old_fence;
 
 		old_fence = rcu_dereference_protected(fobj->shared[i],
 						reservation_object_held(obj));
@@ -123,7 +123,7 @@ reservation_object_add_shared_inplace(struct reservation_object *obj,
 			write_seqcount_end(&obj->seq);
 			preempt_enable();
 
-			fence_put(old_fence);
+			dma_fence_put(old_fence);
 			return;
 		}
 	}
@@ -143,12 +143,12 @@ static void
 reservation_object_add_shared_replace(struct reservation_object *obj,
 				      struct reservation_object_list *old,
 				      struct reservation_object_list *fobj,
-				      struct fence *fence)
+				      struct dma_fence *fence)
 {
 	unsigned i;
-	struct fence *old_fence = NULL;
+	struct dma_fence *old_fence = NULL;
 
-	fence_get(fence);
+	dma_fence_get(fence);
 
 	if (!old) {
 		RCU_INIT_POINTER(fobj->shared[0], fence);
@@ -165,7 +165,7 @@ reservation_object_add_shared_replace(struct reservation_object *obj,
 	fobj->shared_count = old->shared_count;
 
 	for (i = 0; i < old->shared_count; ++i) {
-		struct fence *check;
+		struct dma_fence *check;
 
 		check = rcu_dereference_protected(old->shared[i],
 						reservation_object_held(obj));
@@ -196,7 +196,7 @@ done:
 		kfree_rcu(old, rcu);
 
 	if (old_fence)
-		fence_put(old_fence);
+		dma_fence_put(old_fence);
 }
 
 /**
@@ -208,7 +208,7 @@ done:
  * reservation_object_reserve_shared() has been called.
  */
 void reservation_object_add_shared_fence(struct reservation_object *obj,
-					 struct fence *fence)
+					 struct dma_fence *fence)
 {
 	struct reservation_object_list *old, *fobj = obj->staged;
 
@@ -231,9 +231,9 @@ EXPORT_SYMBOL(reservation_object_add_shared_fence);
  * Add a fence to the exclusive slot.  The obj->lock must be held.
  */
 void reservation_object_add_excl_fence(struct reservation_object *obj,
-				       struct fence *fence)
+				       struct dma_fence *fence)
 {
-	struct fence *old_fence = reservation_object_get_excl(obj);
+	struct dma_fence *old_fence = reservation_object_get_excl(obj);
 	struct reservation_object_list *old;
 	u32 i = 0;
 
@@ -242,7 +242,7 @@ void reservation_object_add_excl_fence(struct reservation_object *obj,
 		i = old->shared_count;
 
 	if (fence)
-		fence_get(fence);
+		dma_fence_get(fence);
 
 	preempt_disable();
 	write_seqcount_begin(&obj->seq);
@@ -255,11 +255,11 @@ void reservation_object_add_excl_fence(struct reservation_object *obj,
 
 	/* inplace update, no shared fences */
 	while (i--)
-		fence_put(rcu_dereference_protected(old->shared[i],
+		dma_fence_put(rcu_dereference_protected(old->shared[i],
 						reservation_object_held(obj)));
 
 	if (old_fence)
-		fence_put(old_fence);
+		dma_fence_put(old_fence);
 }
 EXPORT_SYMBOL(reservation_object_add_excl_fence);
 
@@ -276,12 +276,12 @@ EXPORT_SYMBOL(reservation_object_add_excl_fence);
  * Zero or -errno
  */
 int reservation_object_get_fences_rcu(struct reservation_object *obj,
-				      struct fence **pfence_excl,
+				      struct dma_fence **pfence_excl,
 				      unsigned *pshared_count,
-				      struct fence ***pshared)
+				      struct dma_fence ***pshared)
 {
-	struct fence **shared = NULL;
-	struct fence *fence_excl;
+	struct dma_fence **shared = NULL;
+	struct dma_fence *fence_excl;
 	unsigned int shared_count;
 	int ret = 1;
 
@@ -296,12 +296,12 @@ int reservation_object_get_fences_rcu(struct reservation_object *obj,
 		seq = read_seqcount_begin(&obj->seq);
 
 		fence_excl = rcu_dereference(obj->fence_excl);
-		if (fence_excl && !fence_get_rcu(fence_excl))
+		if (fence_excl && !dma_fence_get_rcu(fence_excl))
 			goto unlock;
 
 		fobj = rcu_dereference(obj->fence);
 		if (fobj) {
-			struct fence **nshared;
+			struct dma_fence **nshared;
 			size_t sz = sizeof(*shared) * fobj->shared_max;
 
 			nshared = krealloc(shared, sz,
@@ -322,15 +322,15 @@ int reservation_object_get_fences_rcu(struct reservation_object *obj,
 
 			for (i = 0; i < shared_count; ++i) {
 				shared[i] = rcu_dereference(fobj->shared[i]);
-				if (!fence_get_rcu(shared[i]))
+				if (!dma_fence_get_rcu(shared[i]))
 					break;
 			}
 		}
 
 		if (i != shared_count || read_seqcount_retry(&obj->seq, seq)) {
 			while (i--)
-				fence_put(shared[i]);
-			fence_put(fence_excl);
+				dma_fence_put(shared[i]);
+			dma_fence_put(fence_excl);
 			goto unlock;
 		}
 
@@ -368,7 +368,7 @@ long reservation_object_wait_timeout_rcu(struct reservation_object *obj,
 					 bool wait_all, bool intr,
 					 unsigned long timeout)
 {
-	struct fence *fence;
+	struct dma_fence *fence;
 	unsigned seq, shared_count, i = 0;
 	long ret = timeout;
 
@@ -389,16 +389,17 @@ retry:
 			shared_count = fobj->shared_count;
 
 		for (i = 0; i < shared_count; ++i) {
-			struct fence *lfence = rcu_dereference(fobj->shared[i]);
+			struct dma_fence *lfence = rcu_dereference(fobj->shared[i]);
 
-			if (test_bit(FENCE_FLAG_SIGNALED_BIT, &lfence->flags))
+			if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
+				     &lfence->flags))
 				continue;
 
-			if (!fence_get_rcu(lfence))
+			if (!dma_fence_get_rcu(lfence))
 				goto unlock_retry;
 
-			if (fence_is_signaled(lfence)) {
-				fence_put(lfence);
+			if (dma_fence_is_signaled(lfence)) {
+				dma_fence_put(lfence);
 				continue;
 			}
 
@@ -408,15 +409,16 @@ retry:
 	}
 
 	if (!shared_count) {
-		struct fence *fence_excl = rcu_dereference(obj->fence_excl);
+		struct dma_fence *fence_excl = rcu_dereference(obj->fence_excl);
 
 		if (fence_excl &&
-		    !test_bit(FENCE_FLAG_SIGNALED_BIT, &fence_excl->flags)) {
-			if (!fence_get_rcu(fence_excl))
+		    !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
+			      &fence_excl->flags)) {
+			if (!dma_fence_get_rcu(fence_excl))
 				goto unlock_retry;
 
-			if (fence_is_signaled(fence_excl))
-				fence_put(fence_excl);
+			if (dma_fence_is_signaled(fence_excl))
+				dma_fence_put(fence_excl);
 			else
 				fence = fence_excl;
 		}
@@ -425,12 +427,12 @@ retry:
 	rcu_read_unlock();
 	if (fence) {
 		if (read_seqcount_retry(&obj->seq, seq)) {
-			fence_put(fence);
+			dma_fence_put(fence);
 			goto retry;
 		}
 
-		ret = fence_wait_timeout(fence, intr, ret);
-		fence_put(fence);
+		ret = dma_fence_wait_timeout(fence, intr, ret);
+		dma_fence_put(fence);
 		if (ret > 0 && wait_all && (i + 1 < shared_count))
 			goto retry;
 	}
@@ -444,18 +446,18 @@ EXPORT_SYMBOL_GPL(reservation_object_wait_timeout_rcu);
 
 
 static inline int
-reservation_object_test_signaled_single(struct fence *passed_fence)
+reservation_object_test_signaled_single(struct dma_fence *passed_fence)
 {
-	struct fence *fence, *lfence = passed_fence;
+	struct dma_fence *fence, *lfence = passed_fence;
 	int ret = 1;
 
-	if (!test_bit(FENCE_FLAG_SIGNALED_BIT, &lfence->flags)) {
-		fence = fence_get_rcu(lfence);
+	if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &lfence->flags)) {
+		fence = dma_fence_get_rcu(lfence);
 		if (!fence)
 			return -1;
 
-		ret = !!fence_is_signaled(fence);
-		fence_put(fence);
+		ret = !!dma_fence_is_signaled(fence);
+		dma_fence_put(fence);
 	}
 	return ret;
 }
@@ -492,7 +494,7 @@ retry:
 			shared_count = fobj->shared_count;
 
 		for (i = 0; i < shared_count; ++i) {
-			struct fence *fence = rcu_dereference(fobj->shared[i]);
+			struct dma_fence *fence = rcu_dereference(fobj->shared[i]);
 
 			ret = reservation_object_test_signaled_single(fence);
 			if (ret < 0)
@@ -506,7 +508,7 @@ retry:
 	}
 
 	if (!shared_count) {
-		struct fence *fence_excl = rcu_dereference(obj->fence_excl);
+		struct dma_fence *fence_excl = rcu_dereference(obj->fence_excl);
 
 		if (fence_excl) {
 			ret = reservation_object_test_signaled_single(