diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 6612796ea69c..96ca90ce0264 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -363,7 +363,9 @@ static inline bool flush_coherent_icache(unsigned long addr)
 	 */
 	if (cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) {
 		mb(); /* sync */
+		allow_read_from_user((const void __user *)addr, L1_CACHE_BYTES);
 		icbi((void *)addr);
+		prevent_read_from_user((const void __user *)addr, L1_CACHE_BYTES);
 		mb(); /* sync */
 		isync();
 		return true;