Get a block of consistent memory
void * dma_pool_alloc(struct dma_pool * pool, gfp_t mem_flags, dma_addr_t * handle);
pool
dma pool that will produce the block
mem_flags
GFP_* bitmask
handle
pointer to dma address of block
This returns the kernel virtual address of a currently unused block, and reports its dma address through the handle. If such a memory block can't be allocated, NULL is returned.