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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); |
16 |
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od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9