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Linux/include/media/videobuf2-memops.h

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  1 /*
  2  * videobuf2-memops.h - generic memory handling routines for videobuf2
  3  *
  4  * Copyright (C) 2010 Samsung Electronics
  5  *
  6  * Author: Pawel Osciak <pawel@osciak.com>
  7  *         Marek Szyprowski <m.szyprowski@samsung.com>
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License as published by
 11  * the Free Software Foundation.
 12  */
 13 
 14 #ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
 15 #define _MEDIA_VIDEOBUF2_MEMOPS_H
 16 
 17 #include <media/videobuf2-v4l2.h>
 18 #include <linux/mm.h>
 19 #include <linux/refcount.h>
 20 
 21 /**
 22  * struct vb2_vmarea_handler - common vma refcount tracking handler.
 23  *
 24  * @refcount:   pointer to &refcount_t entry in the buffer.
 25  * @put:        callback to function that decreases buffer refcount.
 26  * @arg:        argument for @put callback.
 27  */
 28 struct vb2_vmarea_handler {
 29         refcount_t              *refcount;
 30         void                    (*put)(void *arg);
 31         void                    *arg;
 32 };
 33 
 34 extern const struct vm_operations_struct vb2_common_vm_ops;
 35 
 36 struct frame_vector *vb2_create_framevec(unsigned long start,
 37                                          unsigned long length);
 38 void vb2_destroy_framevec(struct frame_vector *vec);
 39 
 40 #endif
 41 

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