| Jeremy Fitzhardinge | d8e0420 | 2009-02-09 12:05:46 -0800 | [diff] [blame] | 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 | } | ||||