blob: ba6eda4b51433e20e87f4ae977cdd565f7d3c300 [file] [log] [blame]
Jeremy Fitzhardinged8e04202009-02-09 12:05:46 -08001#include <linux/bio.h>
2#include <linux/io.h>
3#include <xen/page.h>
4
5bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
6 const struct bio_vec *vec2)
7{
8 unsigned long mfn1 = pfn_to_mfn(page_to_pfn(vec1->bv_page));
9 unsigned long mfn2 = pfn_to_mfn(page_to_pfn(vec2->bv_page));
10
11 return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&
12 ((mfn1 == mfn2) || ((mfn1+1) == mfn2));
13}