Re: [PATCH v7 4/7] powerpc/mm: Add radix__tlb_flush_pte

diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index 3493cf4e0452..7648952e4f08 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c

@@ -428,3 +428,21 @@ void radix__flush_tlb_all(void)
 		     : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(0) : "memory");
 	asm volatile("eieio; tlbsync; ptesync": : :"memory");
 }
+
+void radix__flush_tlb_pte(unsigned long old_pte, struct mm_struct *mm,
+			  unsigned long address)
+{
+	/*
+	 * We track page size in pte only for DD1, So we can
+	 * call this only on DD1.
+	 */
+	if (!cpu_has_feature(CPU_FTR_POWER9_DD1)) {
+		VM_WARN_ON(1);
+		return;
+	}