blk_queue_update_dma(9)
NAME
blk_queue_update_dma_alignment - update dma length and memory alignment
SYNOPSIS
void blk_queue_update_dma_alignment(struct request_queue * q,
int mask);
ARGUMENTS
- q
- the request queue for the device
- mask
- alignment mask
DESCRIPTION
update required memory and length aligment for direct dma transactions.
If the requested alignment is larger than the current alignment, then
the current queue alignment is updated to the new value, otherwise it
is left alone. The design of this is to allow multiple objects (driver,
device, transport etc) to set their respective alignments without
having them interfere.