kfifo_dma_in_prepare9
Setup a scatterlist for dma input
Usage
kfifo_dma_in_prepare(fifo, sgl, nents, len);
Arguments
fifo
address of the fifo to be used
sgl
pointer to the scatterlist array
nents
number of entries in the scatterlist array
len
number of elements to transfer
Overview
This macro fills a scatterlist for DMA input. It returns the number entries in the scatterlist array.
Note that with only one concurrent reader and one concurrent writer, you don't need extra locking to use these macros.
Releases
3 releases since Debian 7 (Wheezy); the text changed 2 times.