| blk_queue_update_dma_alignment(9) - phpMan
BLK_QUEUE_UPDATE_DMA(9) Block Devices 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 alignment 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.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 BLK_QUEUE_UPDATE_DMA(9)
|