diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 8308f32e97823..8e47fb85dfa6b 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -608,8 +608,10 @@ static inline bool pte_access_permitted(pte_t pte, bool write)
  */
 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
 {
-	return __pte((((pte_basic_t)(pfn) << PAGE_SHIFT) & PTE_RPN_MASK) |
-		     pgprot_val(pgprot));
+	VM_BUG_ON(pfn >> (64 - PAGE_SHIFT));
+	VM_BUG_ON((pfn << PAGE_SHIFT) & ~PTE_RPN_MASK);
+
+	return __pte(((pte_basic_t)pfn << PAGE_SHIFT) | pgprot_val(pgprot));
 }
 
 static inline unsigned long pte_pfn(pte_t pte)