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.
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