1#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}

 1#include <linux/bio.h>
 2#include <linux/io.h>
 3#include <linux/export.h>
 4#include <xen/page.h>
 5
 6bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
 7			       const struct bio_vec *vec2)
 8{
 9	unsigned long mfn1 = pfn_to_mfn(page_to_pfn(vec1->bv_page));
10	unsigned long mfn2 = pfn_to_mfn(page_to_pfn(vec2->bv_page));
11
12	return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&
13		((mfn1 == mfn2) || ((mfn1+1) == mfn2));
14}
15EXPORT_SYMBOL(xen_biovec_phys_mergeable);