1BLK_QUEUE_UPDATE_DMA(9)          Block Devices         BLK_QUEUE_UPDATE_DMA(9)
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NAME

6       blk_queue_update_dma_alignment - update dma length and memory alignment
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SYNOPSIS

9       void blk_queue_update_dma_alignment(struct request_queue * q,
10                                           int mask);
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ARGUMENTS

13       q
14           the request queue for the device
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16       mask
17           alignment mask
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DESCRIPTION

20       update required memory and length alignment for direct dma
21       transactions. If the requested alignment is larger than the current
22       alignment, then the current queue alignment is updated to the new
23       value, otherwise it is left alone. The design of this is to allow
24       multiple objects (driver, device, transport etc) to set their
25       respective alignments without having them interfere.
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28Kernel Hackers Manual 3.10         June 2019           BLK_QUEUE_UPDATE_DMA(9)
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