bio_add_pc_page

Name:bio_add_pc_page

Proto:int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page *page, unsigned int len, unsigned int offset)

Type:int

Parameter:

Type	Parameter	Name
struct request_queue *	q
struct bio *	bio
struct page *	page
unsigned int	len
unsigned int	offset

779

bool same_page = false

780

Return __bio_add_pc_page - attempt to add page to passthrough bio*@q: the target queue*@bio: destination bio*@page: page to add*@len: vec entry length*@offset: vec entry offset*@same_page: return if the merge happen inside the same page

**Caller**
Name	Describe
bio_copy_user_iov	_copy_user_iov - copy user data to bio@q: destination block queue@map_data: pointer to the rq_map_data holding pages (if necessary)@iter: iovec iterator@gfp_mask: memory allocation flags* Prepares and returns a bio for indirect user io, bouncing data
bio_map_kern	_map_kern - map kernel address into bio@q: the struct request_queue for the bio@data: pointer to buffer to map@len: length in bytes@gfp_mask: allocation flags for bio allocation* Map the kernel address into a bio suitable for io to a block* device
bio_copy_kern	_copy_kern - copy kernel address into bio@q: the struct request_queue for the bio@data: pointer to buffer to copy@len: length in bytes@gfp_mask: allocation flags for bio and page allocation@reading: data direction is READ copy the kernel address

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