Man page 9 : dmam_pool_create

dmam_pool_create - Managed dma_pool_create

struct dma_pool * dmam_pool_create(const char *  name , struct device *  dev , size_t  size , size_t  align , size_t  allocation );

name
    name of pool, for diagnostics

dev
    device that will be doing the DMA

size
    size of the blocks in this pool.

align
    alignment requirement for blocks; must be a power of two

allocation
    returned blocks wonAqt cross this boundary (or zero)

Managed dma_pool_create. DMA pool created with this function is automatically destroyed on driver detach.