bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, const struct bio_vec *vec2) { unsigned long mfn1 = pfn_to_mfn(page_to_pfn(vec1->bv_page)); unsigned long mfn2 = pfn_to_mfn(page_to_pfn(vec2->bv_page)); return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) && ((mfn1 == mfn2) || ((mfn1+1) == mfn2)); }
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, const struct bio_vec *vec2) { #if XEN_PAGE_SIZE == PAGE_SIZE unsigned long bfn1 = pfn_to_bfn(page_to_pfn(vec1->bv_page)); unsigned long bfn2 = pfn_to_bfn(page_to_pfn(vec2->bv_page)); return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) && ((bfn1 == bfn2) || ((bfn1+1) == bfn2)); #else /* * XXX: Add support for merging bio_vec when using different page * size in Xen and Linux. */ return 0; #endif }