Name
dma_buf_kunmap — 
     Unmap a page obtained by dma_buf_kmap.
 
Synopsis
void dma_buf_kunmap ( | struct dma_buf * dmabuf,  | 
|   | unsigned long page_num,  | 
|   | void * vaddr); | 
 
Arguments
dmabuf
     [in]	buffer to unmap page from.
    
page_num
     [in]	page in PAGE_SIZE units to unmap.
    
vaddr
     [in]	kernel space pointer obtained from dma_buf_kmap.
    
Description
   This call must always succeed.