1 files changed, 16 insertions, 0 deletions
diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h
index 535747d7fee4..7ed165c8d9bc 100644
--- a/tools/testing/vma/include/dup.h
+++ b/tools/testing/vma/include/dup.h
@@ -1548,3 +1548,19 @@ static inline pgprot_t vma_get_page_prot(vma_flags_t vma_flags)
 
 	return vm_get_page_prot(vm_flags);
 }
+
+static inline pgoff_t linear_page_delta(const struct vm_area_struct *vma,
+					const unsigned long address)
+{
+	return (address - vma->vm_start) >> PAGE_SHIFT;
+}
+
+static inline pgoff_t linear_page_index(const struct vm_area_struct *vma,
+					const unsigned long address)
+{
+	pgoff_t pgoff;
+
+	pgoff = linear_page_delta(vma, address);
+	pgoff += vma_start_pgoff(vma);
+	return pgoff;
+}