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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /drivers/xen/biomerge.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'drivers/xen/biomerge.c')
-rw-r--r-- | drivers/xen/biomerge.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/xen/biomerge.c b/drivers/xen/biomerge.c new file mode 100644 index 00000000..0edb91c0 --- /dev/null +++ b/drivers/xen/biomerge.c @@ -0,0 +1,15 @@ +#include <linux/bio.h> +#include <linux/io.h> +#include <linux/export.h> +#include <xen/page.h> + +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)); +} +EXPORT_SYMBOL(xen_biovec_phys_mergeable); |