dma_release_from_coherent(9) centos man page | unix.com

DMA_RELEASE_FROM_COH(9) 				   Device drivers infrastructure				   DMA_RELEASE_FROM_COH(9)

NAME
       dma_release_from_coherent - try to free the memory allocated from per-device coherent memory pool

SYNOPSIS
       int dma_release_from_coherent(struct device * dev, int order, void * vaddr);

ARGUMENTS
       dev
	   device from which the memory was allocated

       order
	   the order of pages allocated

       vaddr
	   virtual address of allocated pages

DESCRIPTION
       This checks whether the memory was allocated from the per-device coherent memory pool and if so, releases that memory.

       Returns 1 if we correctly released the memory, or 0 if dma_release_coherent should proceed with releasing memory from generic pools.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   DMA_RELEASE_FROM_COH(9)