diff --git a/arch/arm/configs/shmobile_defconfig b/arch/arm/configs/shmobile_defconfig
index bda57cafa2bcb9cc5ec572e35cf083195bbbded8..de3830443613e94956c9d463fcff15780702b145 100644
--- a/arch/arm/configs/shmobile_defconfig
+++ b/arch/arm/configs/shmobile_defconfig
@@ -212,4 +212,5 @@ CONFIG_DMA_CMA=y
 CONFIG_CMA_SIZE_MBYTES=64
 CONFIG_PRINTK_TIME=y
 # CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_DEBUG_FS=y
 CONFIG_DEBUG_KERNEL=y