--- zzzz-none-000/linux-3.10.107/include/linux/dma-buf.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/dma-buf.h	2021-02-04 17:41:59.000000000 +0000
@@ -30,6 +30,8 @@
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/fs.h>
+#include <linux/fence.h>
+#include <linux/wait.h>
 
 struct device;
 struct dma_buf;
@@ -113,8 +115,11 @@
  * @attachments: list of dma_buf_attachment that denotes all devices attached.
  * @ops: dma_buf_ops associated with this buffer object.
  * @exp_name: name of the exporter; useful for debugging.
+ * @owner: pointer to exporter module; used for refcounting when exporter is a
+ *         kernel module.
  * @list_node: node for dma_buf accounting and debugging.
  * @priv: exporter specific private data for this buffer object.
+ * @resv: reservation object linked to this dma-buf
  */
 struct dma_buf {
 	size_t size;
@@ -126,8 +131,20 @@
 	unsigned vmapping_counter;
 	void *vmap_ptr;
 	const char *exp_name;
+	struct module *owner;
 	struct list_head list_node;
 	void *priv;
+	struct reservation_object *resv;
+
+	/* poll support */
+	wait_queue_head_t poll;
+
+	struct dma_buf_poll_cb_t {
+		struct fence_cb cb;
+		wait_queue_head_t *poll;
+
+		unsigned long active;
+	} cb_excl, cb_shared;
 };
 
 /**
@@ -149,6 +166,36 @@
 };
 
 /**
+ * struct dma_buf_export_info - holds information needed to export a dma_buf
+ * @exp_name:	name of the exporter - useful for debugging.
+ * @owner:	pointer to exporter module - used for refcounting kernel module
+ * @ops:	Attach allocator-defined dma buf ops to the new buffer
+ * @size:	Size of the buffer
+ * @flags:	mode flags for the file
+ * @resv:	reservation-object, NULL to allocate default one
+ * @priv:	Attach private data of allocator to this buffer
+ *
+ * This structure holds the information required to export the buffer. Used
+ * with dma_buf_export() only.
+ */
+struct dma_buf_export_info {
+	const char *exp_name;
+	struct module *owner;
+	const struct dma_buf_ops *ops;
+	size_t size;
+	int flags;
+	struct reservation_object *resv;
+	void *priv;
+};
+
+/**
+ * helper macro for exporters; zeros and fills in most common values
+ */
+#define DEFINE_DMA_BUF_EXPORT_INFO(a)	\
+	struct dma_buf_export_info a = { .exp_name = KBUILD_MODNAME, \
+					 .owner = THIS_MODULE }
+
+/**
  * get_dma_buf - convenience wrapper for get_file.
  * @dmabuf:	[in]	pointer to dma_buf
  *
@@ -167,11 +214,7 @@
 void dma_buf_detach(struct dma_buf *dmabuf,
 				struct dma_buf_attachment *dmabuf_attach);
 
-struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
-			       size_t size, int flags, const char *);
-
-#define dma_buf_export(priv, ops, size, flags)	\
-	dma_buf_export_named(priv, ops, size, flags, __FILE__)
+struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info);
 
 int dma_buf_fd(struct dma_buf *dmabuf, int flags);
 struct dma_buf *dma_buf_get(int fd);