Name
blk_rq_map_kern —
map kernel data to a request, for REQ_TYPE_BLOCK_PC usage
Synopsis
int blk_rq_map_kern ( | struct request_queue * q, |
| | struct request * rq, |
| | void * kbuf, |
| | unsigned int len, |
| | gfp_t gfp_mask); |
Arguments
q
request queue where request should be inserted
rq
request to fill
kbuf
the kernel buffer
len
length of user data
gfp_mask
memory allocation flags
Description
Data will be mapped directly if possible. Otherwise a bounce
buffer is used. Can be called multple times to append multple
buffers.