| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | #include <linux/bio.h> |
| 2 | #include <linux/io.h> |
| 3 | #include <linux/export.h> |
| 4 | #include <xen/page.h> |
| 5 | |
| 6 | bool 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 | } |
| 15 | EXPORT_SYMBOL(xen_biovec_phys_mergeable); |