diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index c85e963d48939a4098cd4e42600029d5b4875a78..5156d26277793daf921fefe4be33d0b4057f1b9b 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -8,6 +8,10 @@
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
+
+#define pr_fmt(fmt) "radix-mmu: " fmt
+
+#include <linux/kernel.h>
 #include <linux/sched/mm.h>
 #include <linux/memblock.h>
 #include <linux/of_fdt.h>