DMA_RELEASE_FROM_COH - Online Linux Manual Page

Section : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Device drivers infrastructure

NAMEdma_release_from_coherent − try to free the memory allocated from per−device coherent memory pool

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

ARGUMENTSdev device from which the memory was allocated order the order of pages allocated vaddr virtual address of allocated pages

DESCRIPTIONThis 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​.

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