xref: /openbmc/linux/drivers/xen/biomerge.c (revision 7fe2f639)
1 #include <linux/bio.h>
2 #include <linux/io.h>
3 #include <xen/page.h>
4 
5 bool 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 }
14