tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <linux/bio.h>
2#include <linux/io.h>
3#include <linux/export.h>
4#include <xen/page.h>
5
6bool 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}
15EXPORT_SYMBOL(xen_biovec_phys_mergeable);