From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
This functions in intended to replace sync_pt_create() and it does
exactly the same thing sync_pt_create() did.
Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
---
drivers/dma-buf/fence.c | 38 ++++++++++++++++++++++++++++++++++++++
drivers/staging/android/sync.c | 20 ++------------------
include/linux/fence.h | 3 +++
3 files changed, 43 insertions(+), 18 deletions(-)
diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c
index ec51146..0a07fcb 100644
--- a/drivers/dma-buf/fence.c
+++ b/drivers/dma-buf/fence.c
@@ -768,6 +768,44 @@ err_free_cb:
EXPORT_SYMBOL(fence_wait_any_timeout);
/**
+ * fence_create_on_timeline - create a fence and add it to the timeline
+ * or until timeout elapses
+ * @obj: [in] timeline object
+ * @ops: [in] fence_ops to use
+ * @size: [in] size to allocate struct fence
+ * @value: [in] value of this fence
+ *
+ * This function allocates a new fence and initialize it as a child of the
+ * fence_timeline provided. The value received is the seqno used to know
+ * when the fence is signaled.
+ *
+ * Returns NULL if fails to allocate memory or size is too small.
+ */
+struct fence *fence_create_on_timeline(struct fence_timeline *obj,
+ const struct fence_ops *ops, int size,
+ unsigned int value)
+{
+ unsigned long flags;
+ struct fence *fence;
+
+ if (size < sizeof(*fence))
+ return NULL;
+
+ fence = kzalloc(size, GFP_KERNEL);
+ if (!fence)
+ return NULL;
+
+ spin_lock_irqsave(&obj->lock, flags);
+ fence_timeline_get(obj);
+ fence_init(fence, ops, &obj->lock, obj->context, value);
+ list_add_tail(&fence->child_list, &obj->child_list_head);
+ INIT_LIST_HEAD(&fence->active_list);
+ spin_unlock_irqrestore(&obj->lock, flags);
+ return fence;
+}
+EXPORT_SYMBOL(fence_create_on_timeline);
+
+/**
* fence_init - Initialize a custom fence.
* @fence: [in] the fence to initialize
* @ops: [in] the fence_ops for operations on this fence
diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index a275108..2365db7 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -36,24 +36,8 @@ static const struct file_operations sync_fence_fops;
struct fence *sync_pt_create(struct fence_timeline *obj, int size, u32 value)
{
- unsigned long flags;
- struct fence *fence;
-
- if (size < sizeof(*fence))
- return NULL;
-
- fence = kzalloc(size, GFP_KERNEL);
- if (!fence)
- return NULL;
-
- spin_lock_irqsave(&obj->lock, flags);
- fence_timeline_get(obj);
- fence_init(fence, &sync_fence_ops, &obj->lock,
- obj->context, value);
- list_add_tail(&fence->child_list, &obj->child_list_head);
- INIT_LIST_HEAD(&fence->active_list);
- spin_unlock_irqrestore(&obj->lock, flags);
- return fence;
+ return fence_create_on_timeline(obj, &sync_fence_ops,
+ sizeof(struct fence), value);
}
EXPORT_SYMBOL(sync_pt_create);
diff --git a/include/linux/fence.h b/include/linux/fence.h
index 8908433..adece43 100644
--- a/include/linux/fence.h
+++ b/include/linux/fence.h
@@ -212,6 +212,9 @@ struct fence_ops {
void (*timeline_value_str)(struct fence *fence, char *str, int size);
};
+struct fence *fence_create_on_timeline(struct fence_timeline *obj,
+ const struct fence_ops *ops, int size,
+ unsigned int value);
void fence_init(struct fence *fence, const struct fence_ops *ops,
spinlock_t *lock, unsigned context, unsigned seqno);
--
2.5.0
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