781 		struct page *page, unsigned int len, unsigned int off,  in page_is_mergeable()  argument
786 	phys_addr_t page_addr = page_to_phys(page);  in page_is_mergeable()
790 	if (xen_domain() && !xen_biovec_phys_mergeable(bv, page))  in page_is_mergeable()
796 	return (bv->bv_page + bv_end / PAGE_SIZE) == (page + off / PAGE_SIZE);  in page_is_mergeable()
805 				 struct page *page, unsigned len,  in bio_try_merge_hw_seg()  argument
811 	phys_addr_t addr2 = page_to_phys(page) + offset + len - 1;  in bio_try_merge_hw_seg()
817 	return __bio_try_merge_page(bio, page, len, offset, same_page);  in bio_try_merge_hw_seg()
834 		struct page *page, unsigned int len, unsigned int offset,  in bio_add_hw_page()  argument
846 		if (bio_try_merge_hw_seg(q, bio, page, len, offset, same_page))  in bio_add_hw_page()
865 	bvec->bv_page = page;  in bio_add_hw_page()
889 		struct page *page, unsigned int len, unsigned int offset)  in bio_add_pc_page()  argument
892 	return bio_add_hw_page(q, bio, page, len, offset,  in bio_add_pc_page()
913 int bio_add_zone_append_page(struct bio *bio, struct page *page,  in bio_add_zone_append_page()  argument
925 	return bio_add_hw_page(q, bio, page, len, offset,  in bio_add_zone_append_page()
946 bool __bio_try_merge_page(struct bio *bio, struct page *page,  in __bio_try_merge_page()  argument
955 		if (page_is_mergeable(bv, page, len, off, same_page)) {  in __bio_try_merge_page()
979 void __bio_add_page(struct bio *bio, struct page *page,  in __bio_add_page()  argument
987 	bv->bv_page = page;  in __bio_add_page()
994 	if (!bio_flagged(bio, BIO_WORKINGSET) && unlikely(PageWorkingset(page)))  in __bio_add_page()
1009 int bio_add_page(struct bio *bio, struct page *page,  in bio_add_page()  argument
1014 	if (!__bio_try_merge_page(bio, page, len, offset, &same_page)) {  in bio_add_page()
1017 		__bio_add_page(bio, page, len, offset);  in bio_add_page()
1069 static void bio_put_pages(struct page **pages, size_t size, size_t off)  in bio_put_pages()
1077 static int bio_iov_add_page(struct bio *bio, struct page *page,  in bio_iov_add_page()  argument
1082 	if (!__bio_try_merge_page(bio, page, len, offset, &same_page)) {  in bio_iov_add_page()
1085 		__bio_add_page(bio, page, len, offset);  in bio_iov_add_page()
1090 		put_page(page);  in bio_iov_add_page()
1094 static int bio_iov_add_zone_append_page(struct bio *bio, struct page *page,  in bio_iov_add_zone_append_page()  argument
1100 	if (bio_add_hw_page(q, bio, page, len, offset,  in bio_iov_add_zone_append_page()
1104 		put_page(page);  in bio_iov_add_zone_append_page()
1108 #define PAGE_PTRS_PER_BVEC     (sizeof(struct bio_vec) / sizeof(struct page *))
1125 	struct page **pages = (struct page **)bv;  in __bio_iov_iter_get_pages()
1144 		struct page *page = pages[i];  in __bio_iov_iter_get_pages()  local
1148 			ret = bio_iov_add_zone_append_page(bio, page, len,  in __bio_iov_iter_get_pages()
1151 			ret = bio_iov_add_page(bio, page, len, offset);  in __bio_iov_iter_get_pages()