table of contents
| 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¶
| May 2024 | Kernel Hackers Manual 2.6. |