diff --git a/arch/arm/configs/efm32_defconfig b/arch/arm/configs/efm32_defconfig
index c4c17e3a8e1a..f2426104ee2b 100644
--- a/arch/arm/configs/efm32_defconfig
+++ b/arch/arm/configs/efm32_defconfig
@@ -85,7 +85,6 @@ CONFIG_GPIO_SYSFS=y
 # CONFIG_USB_SUPPORT is not set
 CONFIG_MMC=y
 CONFIG_MMC_SPI=y
-# CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXT2_FS=y
 # CONFIG_FILE_LOCKING is not set
 # CONFIG_DNOTIFY is not set
diff --git a/arch/arm/configs/lpc18xx_defconfig b/arch/arm/configs/lpc18xx_defconfig
index caf7b5248943..d4320a7e433f 100644
--- a/arch/arm/configs/lpc18xx_defconfig
+++ b/arch/arm/configs/lpc18xx_defconfig
@@ -22,6 +22,7 @@ CONFIG_EMBEDDED=y
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
 # CONFIG_MMU is not set
+CONFIG_ARM_SINGLE_ARMV7M=y
 CONFIG_ARCH_LPC18XX=y
 CONFIG_SET_MEM_PARAM=y
 CONFIG_DRAM_BASE=0x28000000
diff --git a/arch/arm/configs/stm32_defconfig b/arch/arm/configs/stm32_defconfig
index fab9cf9bff02..4725fab562cb 100644
--- a/arch/arm/configs/stm32_defconfig
+++ b/arch/arm/configs/stm32_defconfig
@@ -18,6 +18,7 @@ CONFIG_EMBEDDED=y
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
 # CONFIG_MMU is not set
+CONFIG_ARM_SINGLE_ARMV7M=y
 CONFIG_ARCH_STM32=y
 CONFIG_SET_MEM_PARAM=y
 CONFIG_DRAM_BASE=0x90000000