bio_kmalloc

Name:bio_kmalloc

Proto:static inline struct bio *bio_kmalloc(gfp_t gfp_mask, unsigned int nr_iovecs)

Type:struct bio

Parameter:

Type	Parameter	Name
gfp_t	gfp_mask
unsigned int	nr_iovecs

405

Return _alloc_bioset - allocate a bio for I/O*@gfp_mask: the GFP_* mask given to the slab allocator*@nr_iovecs: number of iovecs to pre-allocate*@bs: the bio_set to allocate from

**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_user_iov	_map_user_iov - map user iovec into bio@q: the struct request_queue for the bio@iter: iovec iterator@gfp_mask: memory allocation flags Map the user space address into a bio suitable for io to a block* device. Returns an error pointer in case of error.
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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