dma-buf: Use recommended structure member reference

I just learned that &struct_name.member_name works and looks pretty
even. It doesn't (yet) link to the member directly though, which would
be really good for big structures or vfunc tables (where the
per-member kerneldoc tends to be long).

Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NDavid Herrmann <dh.herrmann@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483044517-5770-5-git-send-email-daniel.vetter@ffwll.ch

drivers/dma-buf/dma-buf.c

@@ -516,9 +516,8 @@ EXPORT_SYMBOL_GPL(dma_buf_get);
  * Uses file's refcounting done implicitly by fput().
  *
  * If, as a result of this call, the refcount becomes 0, the 'release' file
- * operation related to this fd is called. It calls the release operation of
- * &struct dma_buf_ops in turn, and frees the memory allocated for dmabuf when
- * exported.
+ * operation related to this fd is called. It calls &dma_buf_ops.release vfunc
+ * in turn, and frees the memory allocated for dmabuf when exported.
  */
 void dma_buf_put(struct dma_buf *dmabuf)
 {

include/linux/dma-buf.h

@@ -66,8 +66,8 @@ struct dma_buf_ops {
 	 * is not the case, and the allocation cannot be moved, it should also
 	 * fail the attach operation.
 	 *
-	 * Any exporter-private housekeeping data can be stored in the priv
-	 * pointer of &dma_buf_attachment structure.
+	 * Any exporter-private housekeeping data can be stored in the
+	 * &dma_buf_attachment.priv pointer.
 	 *
 	 * This callback is optional.
 	 *
@@ -106,7 +106,7 @@ struct dma_buf_ops {
 	 *
 	 * Note that any specific buffer attributes required for this function
 	 * should get added to device_dma_parameters accessible via
-	 * device->dma_params from the &dma_buf_attachment. The @attach callback
+	 * &device.dma_params from the &dma_buf_attachment. The @attach callback
 	 * should also check these constraints.
 	 *
 	 * If this is being called for the first time, the exporter can now