SuSE 11.3 - man page for bio_add_pc_page (suse section 9)
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BIO_ADD_PC_PAGE(9) The Linux VFS BIO_ADD_PC_PAGE(9)
bio_add_pc_page - attempt to add page to bio
int bio_add_pc_page(struct request_queue * q, struct bio * bio, struct page * page,
unsigned int len, unsigned int offset);
the target queue
page to add
vec entry length
vec entry offset
Attempt to add a page to the bio_vec maplist. This can fail for a number of reasons, such
as the bio being full or target block device limitations. The target block device must
allow bio's smaller than PAGE_SIZE, so it is always possible to add a single page to an
empty bio. This should only be used by REQ_PC bios.
Kernel Hackers Manual 2.6. July 2010 BIO_ADD_PC_PAGE(9)
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