KFIFO_DMA_IN_PREPARE(9)                    FIFO Buffer                    KFIFO_DMA_IN_PREPARE(9)



NAME
       kfifo_dma_in_prepare - setup a scatterlist for DMA input

SYNOPSIS
       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

DESCRIPTION
       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.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   KFIFO_DMA_IN_PREPARE(9)