Provided by: kernel-doc-2.4.27_2.4.27-12_all bug


       blk_queue_bounce_limit -  set bounce buffer limit for queue


       void blk_queue_bounce_limit (request_queue_t *q, u64 dma_addr);


       q             the request queue for the device

       dma_addr       bus address limit


       Different  hardware can have different requirements as to what pages it
       can   do   I/O   directly   to.   A   low   level   driver   can   call
       blk_queue_bounce_limit  to  have lower memory pages allocated as bounce
       buffers for doing I/O to pages residing  above  page.  By  default  the
       block layer sets this to the highest numbered "low" memory page.