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0b934ccd70
When Xen is enabled, using BIOVEC_PHYS_MERGEABLE in a module causes xen_biovec_phys_mergeable to be referenced, so it needs to be exported. Acked-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
15 lines
425 B
C
15 lines
425 B
C
#include <linux/bio.h>
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#include <linux/io.h>
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#include <xen/page.h>
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bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
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const struct bio_vec *vec2)
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{
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unsigned long mfn1 = pfn_to_mfn(page_to_pfn(vec1->bv_page));
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unsigned long mfn2 = pfn_to_mfn(page_to_pfn(vec2->bv_page));
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return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&
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((mfn1 == mfn2) || ((mfn1+1) == mfn2));
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}
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EXPORT_SYMBOL(xen_biovec_phys_mergeable);
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