3 #include <linux/export.h>
6 bool xen_biovec_phys_mergeable(const struct bio_vec
*vec1
,
7 const struct bio_vec
*vec2
)
9 #if XEN_PAGE_SIZE == PAGE_SIZE
10 unsigned long bfn1
= pfn_to_bfn(page_to_pfn(vec1
->bv_page
));
11 unsigned long bfn2
= pfn_to_bfn(page_to_pfn(vec2
->bv_page
));
13 return bfn1
+ PFN_DOWN(vec1
->bv_offset
+ vec1
->bv_len
) == bfn2
;
16 * XXX: Add support for merging bio_vec when using different page
17 * size in Xen and Linux.
22 EXPORT_SYMBOL(xen_biovec_phys_mergeable
);