BLK_RQ_MAP_KERN(9) Block Devices BLK_RQ_MAP_KERN(9)
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.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 BLK_RQ_MAP_KERN(9)
