drm/syncobj: add new drm_syncobj_add_point interface v4

	spin_unlock(&syncobj->lock);

}

/**

 * drm_syncobj_add_point - add new timeline point to the syncobj

 * @syncobj: sync object to add timeline point do

 * @chain: chain node to use to add the point

 * @fence: fence to encapsulate in the chain node

 * @point: sequence number to use for the point

 *

 * Add the chain node as new timeline point to the syncobj.

 */

void drm_syncobj_add_point(struct drm_syncobj *syncobj,

			   struct dma_fence_chain *chain,

			   struct dma_fence *fence,

			   uint64_t point)

{

	struct syncobj_wait_entry *cur, *tmp;

	struct dma_fence *prev;

	dma_fence_get(fence);

	spin_lock(&syncobj->lock);

	prev = drm_syncobj_fence_get(syncobj);

	/* You are adding an unorder point to timeline, which could cause payload returned from query_ioctl is 0! */

	if (prev && prev->seqno >= point)

		DRM_ERROR("You are adding an unorder point to timeline!\n");

	dma_fence_chain_init(chain, prev, fence, point);

	rcu_assign_pointer(syncobj->fence, &chain->base);

	list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {

		list_del_init(&cur->node);

		syncobj_wait_syncobj_func(syncobj, cur);

	}

	spin_unlock(&syncobj->lock);

	/* Walk the chain once to trigger garbage collection */

	dma_fence_chain_for_each(fence, prev);

	dma_fence_put(prev);

}

EXPORT_SYMBOL(drm_syncobj_add_point);

/**

 * drm_syncobj_replace_fence - replace fence in a sync object.

 * @syncobj: Sync object to replace fence in

#define __DRM_SYNCOBJ_H__

#include <linux/dma-fence.h>

#include <linux/dma-fence-chain.h>

struct drm_file;

struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,

				     u32 handle);

void drm_syncobj_add_point(struct drm_syncobj *syncobj,

			   struct dma_fence_chain *chain,

			   struct dma_fence *fence,

			   uint64_t point);

void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,

			       struct dma_fence *fence);

int drm_syncobj_find_fence(struct drm_file *file_private,