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Commit | Line | Data |
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d8e04206 JF |
1 | #include <linux/bio.h> |
2 | #include <linux/io.h> | |
9ef9b20b | 3 | #include <linux/export.h> |
d8e04206 JF |
4 | #include <xen/page.h> |
5 | ||
6 | bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, | |
7 | const struct bio_vec *vec2) | |
8 | { | |
36f8abd3 | 9 | #if XEN_PAGE_SIZE == PAGE_SIZE |
32e09870 JG |
10 | unsigned long bfn1 = pfn_to_bfn(page_to_pfn(vec1->bv_page)); |
11 | unsigned long bfn2 = pfn_to_bfn(page_to_pfn(vec2->bv_page)); | |
d8e04206 | 12 | |
462cdace | 13 | return bfn1 + PFN_DOWN(vec1->bv_offset + vec1->bv_len) == bfn2; |
36f8abd3 JG |
14 | #else |
15 | /* | |
16 | * XXX: Add support for merging bio_vec when using different page | |
17 | * size in Xen and Linux. | |
18 | */ | |
19 | return 0; | |
20 | #endif | |
d8e04206 | 21 | } |
0b934ccd | 22 | EXPORT_SYMBOL(xen_biovec_phys_mergeable); |