Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d8e04206 | 2 | #include <linux/bio.h> |
9ef9b20b | 3 | #include <linux/export.h> |
c39ae60d | 4 | #include <xen/xen.h> |
d8e04206 JF |
5 | #include <xen/page.h> |
6 | ||
0383ad43 | 7 | /* check if @page can be merged with 'vec1' */ |
d8e04206 | 8 | bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, |
0383ad43 | 9 | const struct page *page) |
d8e04206 | 10 | { |
36f8abd3 | 11 | #if XEN_PAGE_SIZE == PAGE_SIZE |
32e09870 | 12 | unsigned long bfn1 = pfn_to_bfn(page_to_pfn(vec1->bv_page)); |
0383ad43 | 13 | unsigned long bfn2 = pfn_to_bfn(page_to_pfn(page)); |
d8e04206 | 14 | |
462cdace | 15 | return bfn1 + PFN_DOWN(vec1->bv_offset + vec1->bv_len) == bfn2; |
36f8abd3 JG |
16 | #else |
17 | /* | |
18 | * XXX: Add support for merging bio_vec when using different page | |
19 | * size in Xen and Linux. | |
20 | */ | |
bf06bad9 | 21 | return false; |
36f8abd3 | 22 | #endif |
d8e04206 | 23 | } |