v4.19.13 snapshot.
diff --git a/include/media/videobuf-vmalloc.h b/include/media/videobuf-vmalloc.h
new file mode 100644
index 0000000..36c6a4a
--- /dev/null
+++ b/include/media/videobuf-vmalloc.h
@@ -0,0 +1,46 @@
+/*
+ * helper functions for vmalloc capture buffers
+ *
+ * The functions expect the hardware being able to scatter gather
+ * (i.e. the buffers are not linear in physical memory, but fragmented
+ * into PAGE_SIZE chunks). They also assume the driver does not need
+ * to touch the video data.
+ *
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2
+ */
+#ifndef _VIDEOBUF_VMALLOC_H
+#define _VIDEOBUF_VMALLOC_H
+
+#include <media/videobuf-core.h>
+
+/* --------------------------------------------------------------------- */
+
+struct videobuf_vmalloc_memory {
+ u32 magic;
+
+ void *vaddr;
+
+ /* remap_vmalloc_range seems to need to run
+ * after mmap() on some cases */
+ struct vm_area_struct *vma;
+};
+
+void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
+ const struct videobuf_queue_ops *ops,
+ struct device *dev,
+ spinlock_t *irqlock,
+ enum v4l2_buf_type type,
+ enum v4l2_field field,
+ unsigned int msize,
+ void *priv,
+ struct mutex *ext_lock);
+
+void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
+
+void videobuf_vmalloc_free(struct videobuf_buffer *buf);
+
+#endif