diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 757fc11de30d824036baf9de37cacfb1a036b7eb..35b832f4bc7ecac3a233eab04a8416a54931fab9 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -45,8 +45,8 @@ static struct platform_device exynos_cpuidle = {
 	.id                = -1,
 };
 
-void __iomem *sysram_base_addr;
-void __iomem *sysram_ns_base_addr;
+void __iomem *sysram_base_addr __ro_after_init;
+void __iomem *sysram_ns_base_addr __ro_after_init;
 
 void __init exynos_sysram_init(void)
 {
diff --git a/arch/arm/mach-exynos/mcpm-exynos.c b/arch/arm/mach-exynos/mcpm-exynos.c
index f086bf615b2972ee640e61256cba3438c9c9ae2a..038fd8c993d0e6aa58acd7698be6c29cd287d4cc 100644
--- a/arch/arm/mach-exynos/mcpm-exynos.c
+++ b/arch/arm/mach-exynos/mcpm-exynos.c
@@ -32,7 +32,7 @@
 #define EXYNOS5420_USE_ARM_CORE_DOWN_STATE	BIT(29)
 #define EXYNOS5420_USE_L2_COMMON_UP_STATE	BIT(30)
 
-static void __iomem *ns_sram_base_addr;
+static void __iomem *ns_sram_base_addr __ro_after_init;
 
 /*
  * The common v7_exit_coherency_flush API could not be used because of the
diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index 06332f6265652e16dbd5503dcce3f45425e4fefb..5184202410621d27f341c5c691c8d6f2c948038a 100644
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -57,7 +57,7 @@ struct exynos_wkup_irq {
 struct exynos_pm_data {
 	const struct exynos_wkup_irq *wkup_irq;
 	unsigned int wake_disable_mask;
-	unsigned int *release_ret_regs;
+	const unsigned int *release_ret_regs;
 
 	void (*pm_prepare)(void);
 	void (*pm_resume_prepare)(void);
@@ -66,7 +66,7 @@ struct exynos_pm_data {
 	int (*cpu_suspend)(unsigned long);
 };
 
-static const struct exynos_pm_data *pm_data;
+static const struct exynos_pm_data *pm_data __ro_after_init;
 
 static int exynos5420_cpu_state;
 static unsigned int exynos_pmu_spare3;
@@ -95,7 +95,7 @@ static const struct exynos_wkup_irq exynos5250_wkup_irq[] = {
 	{ /* sentinel */ },
 };
 
-static unsigned int exynos_release_ret_regs[] = {
+static const unsigned int exynos_release_ret_regs[] = {
 	S5P_PAD_RET_MAUDIO_OPTION,
 	S5P_PAD_RET_GPIO_OPTION,
 	S5P_PAD_RET_UART_OPTION,
@@ -106,7 +106,7 @@ static unsigned int exynos_release_ret_regs[] = {
 	REG_TABLE_END,
 };
 
-static unsigned int exynos3250_release_ret_regs[] = {
+static const unsigned int exynos3250_release_ret_regs[] = {
 	S5P_PAD_RET_MAUDIO_OPTION,
 	S5P_PAD_RET_GPIO_OPTION,
 	S5P_PAD_RET_UART_OPTION,
@@ -119,7 +119,7 @@ static unsigned int exynos3250_release_ret_regs[] = {
 	REG_TABLE_END,
 };
 
-static unsigned int exynos5420_release_ret_regs[] = {
+static const unsigned int exynos5420_release_ret_regs[] = {
 	EXYNOS_PAD_RET_DRAM_OPTION,
 	EXYNOS_PAD_RET_MAUDIO_OPTION,
 	EXYNOS_PAD_RET_JTAG_OPTION,
diff --git a/arch/arm/mach-s3c24xx/bast-irq.c b/arch/arm/mach-s3c24xx/bast-irq.c
index 2bb08961e934ca91c704e32b6f0a324516157e17..ad8f4cd7c3279273f1d4eac333859540a7caeffc 100644
--- a/arch/arm/mach-s3c24xx/bast-irq.c
+++ b/arch/arm/mach-s3c24xx/bast-irq.c
@@ -44,7 +44,7 @@
 /* table of ISA irq nos to the relevant mask... zero means
  * the irq is not implemented
 */
-static unsigned char bast_pc104_irqmasks[] = {
+static const unsigned char bast_pc104_irqmasks[] = {
 	0,   /* 0 */
 	0,   /* 1 */
 	0,   /* 2 */
@@ -63,7 +63,7 @@ static unsigned char bast_pc104_irqmasks[] = {
 	0,   /* 15 */
 };
 
-static unsigned char bast_pc104_irqs[] = { 3, 5, 7, 10 };
+static const unsigned char bast_pc104_irqs[] = { 3, 5, 7, 10 };
 
 static void
 bast_pc104_mask(struct irq_data *data)
diff --git a/arch/arm/mach-s3c24xx/iotiming-s3c2410.c b/arch/arm/mach-s3c24xx/iotiming-s3c2410.c
index 65e5f9cb650fa4572a62b3dd7ece68db0526678a..b7970f1fa3d5f47576be237fbbb612494dba32b6 100644
--- a/arch/arm/mach-s3c24xx/iotiming-s3c2410.c
+++ b/arch/arm/mach-s3c24xx/iotiming-s3c2410.c
@@ -249,7 +249,7 @@ static int s3c2410_calc_bank(struct s3c_cpufreq_config *cfg,
 	return 0;
 }
 
-static unsigned int tacc_tab[] = {
+static const unsigned int tacc_tab[] = {
 	[0]	= 1,
 	[1]	= 2,
 	[2]	= 3,
diff --git a/arch/arm/mach-s3c24xx/pm-s3c2412.c b/arch/arm/mach-s3c24xx/pm-s3c2412.c
index d75f95e487ee6414eb7d02908bbdf5320475950a..0ae4d47a4663a82781aa10c288c8f25c49a2ebff 100644
--- a/arch/arm/mach-s3c24xx/pm-s3c2412.c
+++ b/arch/arm/mach-s3c24xx/pm-s3c2412.c
@@ -53,7 +53,7 @@ static int s3c2412_cpu_suspend(unsigned long arg)
 }
 
 /* mapping of interrupts to parts of the wakeup mask */
-static struct samsung_wakeup_mask wake_irqs[] = {
+static const struct samsung_wakeup_mask wake_irqs[] = {
 	{ .irq = IRQ_RTC,	.bit = S3C2412_PWRCFG_RTC_MASKIRQ, },
 };
 
diff --git a/arch/arm/mach-s3c64xx/common.c b/arch/arm/mach-s3c64xx/common.c
index 7c66ce1a6bb69276a8576147a9a5fd7fdf4acc59..9843eb4dd04ee05a4377fc8727d0836b35245d65 100644
--- a/arch/arm/mach-s3c64xx/common.c
+++ b/arch/arm/mach-s3c64xx/common.c
@@ -56,7 +56,8 @@
 #include "watchdog-reset.h"
 
 /* External clock frequency */
-static unsigned long xtal_f = 12000000, xusbxti_f = 48000000;
+static unsigned long xtal_f __ro_after_init = 12000000;
+static unsigned long xusbxti_f __ro_after_init = 48000000;
 
 void __init s3c64xx_set_xtal_freq(unsigned long freq)
 {
diff --git a/arch/arm/mach-s3c64xx/dev-audio.c b/arch/arm/mach-s3c64xx/dev-audio.c
index b57783371d525976946f3f47a2b37933308756f9..a3f39dd114f949835dce467fbd10637858f876c2 100644
--- a/arch/arm/mach-s3c64xx/dev-audio.c
+++ b/arch/arm/mach-s3c64xx/dev-audio.c
@@ -58,9 +58,6 @@ static struct resource s3c64xx_iis0_resource[] = {
 
 static struct s3c_audio_pdata i2s0_pdata = {
 	.cfg_gpio = s3c64xx_i2s_cfg_gpio,
-	.dma_filter = pl08x_filter_id,
-	.dma_playback = DMACH_I2S0_OUT,
-	.dma_capture = DMACH_I2S0_IN,
 };
 
 struct platform_device s3c64xx_device_iis0 = {
@@ -80,9 +77,6 @@ static struct resource s3c64xx_iis1_resource[] = {
 
 static struct s3c_audio_pdata i2s1_pdata = {
 	.cfg_gpio = s3c64xx_i2s_cfg_gpio,
-	.dma_filter = pl08x_filter_id,
-	.dma_playback = DMACH_I2S1_OUT,
-	.dma_capture = DMACH_I2S1_IN,
 };
 
 struct platform_device s3c64xx_device_iis1 = {
@@ -102,9 +96,6 @@ static struct resource s3c64xx_iisv4_resource[] = {
 
 static struct s3c_audio_pdata i2sv4_pdata = {
 	.cfg_gpio = s3c64xx_i2s_cfg_gpio,
-	.dma_filter = pl08x_filter_id,
-	.dma_playback = DMACH_HSI_I2SV40_TX,
-	.dma_capture = DMACH_HSI_I2SV40_RX,
 	.type = {
 		.i2s = {
 			.quirks = QUIRK_PRI_6CHAN,
@@ -153,9 +144,6 @@ static struct resource s3c64xx_pcm0_resource[] = {
 
 static struct s3c_audio_pdata s3c_pcm0_pdata = {
 	.cfg_gpio = s3c64xx_pcm_cfg_gpio,
-	.dma_filter = pl08x_filter_id,
-	.dma_capture = DMACH_PCM0_RX,
-	.dma_playback = DMACH_PCM0_TX,
 };
 
 struct platform_device s3c64xx_device_pcm0 = {
@@ -175,9 +163,6 @@ static struct resource s3c64xx_pcm1_resource[] = {
 
 static struct s3c_audio_pdata s3c_pcm1_pdata = {
 	.cfg_gpio = s3c64xx_pcm_cfg_gpio,
-	.dma_filter = pl08x_filter_id,
-	.dma_playback = DMACH_PCM1_TX,
-	.dma_capture = DMACH_PCM1_RX,
 };
 
 struct platform_device s3c64xx_device_pcm1 = {
@@ -209,10 +194,6 @@ static struct resource s3c64xx_ac97_resource[] = {
 };
 
 static struct s3c_audio_pdata s3c_ac97_pdata = {
-	.dma_playback = DMACH_AC97_PCMOUT,
-	.dma_filter = pl08x_filter_id,
-	.dma_capture = DMACH_AC97_PCMIN,
-	.dma_capture_mic = DMACH_AC97_MICIN,
 };
 
 static u64 s3c64xx_ac97_dmamask = DMA_BIT_MASK(32);
diff --git a/arch/arm/mach-s3c64xx/pm.c b/arch/arm/mach-s3c64xx/pm.c
index 59d91b83b03d7d801a10cca757d2e9fada4be4bc..b0be382ff6bb7fa7debce8a9f7cbc2b2384e2bc1 100644
--- a/arch/arm/mach-s3c64xx/pm.c
+++ b/arch/arm/mach-s3c64xx/pm.c
@@ -285,7 +285,7 @@ static int s3c64xx_cpu_suspend(unsigned long arg)
 }
 
 /* mapping of interrupts to parts of the wakeup mask */
-static struct samsung_wakeup_mask wake_irqs[] = {
+static const struct samsung_wakeup_mask wake_irqs[] = {
 	{ .irq = IRQ_RTC_ALARM,	.bit = S3C64XX_PWRCFG_RTC_ALARM_DISABLE, },
 	{ .irq = IRQ_RTC_TIC,	.bit = S3C64XX_PWRCFG_RTC_TICK_DISABLE, },
 	{ .irq = IRQ_PENDN,	.bit = S3C64XX_PWRCFG_TS_DISABLE, },
diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
index cf7b95fddbb383864e53a082122562f1741a800f..03fac123676db0c5eb9901076ead5b65c33bd889 100644
--- a/arch/arm/plat-samsung/devs.c
+++ b/arch/arm/plat-samsung/devs.c
@@ -77,15 +77,6 @@ static struct resource s3c_ac97_resource[] = {
 	[1] = DEFINE_RES_IRQ(IRQ_S3C244X_AC97),
 };
 
-static struct s3c_audio_pdata s3c_ac97_pdata = {
-#ifdef CONFIG_S3C24XX_DMAC
-	.dma_filter = s3c24xx_dma_filter,
-#endif
-	.dma_playback = (void *)DMACH_PCM_OUT,
-	.dma_capture = (void *)DMACH_PCM_IN,
-	.dma_capture_mic = (void *)DMACH_MIC_IN,
-};
-
 struct platform_device s3c_device_ac97 = {
 	.name		= "samsung-ac97",
 	.id		= -1,
@@ -94,7 +85,6 @@ struct platform_device s3c_device_ac97 = {
 	.dev		= {
 		.dma_mask		= &samsung_device_dma_mask,
 		.coherent_dma_mask	= DMA_BIT_MASK(32),
-		.platform_data		= &s3c_ac97_pdata,
 	}
 };
 #endif /* CONFIG_CPU_S3C2440 */
@@ -574,14 +564,6 @@ static struct resource s3c_iis_resource[] = {
 	[0] = DEFINE_RES_MEM(S3C24XX_PA_IIS, S3C24XX_SZ_IIS),
 };
 
-static struct s3c_audio_pdata s3c_iis_platdata = {
-#ifdef CONFIG_S3C24XX_DMAC
-	.dma_filter = s3c24xx_dma_filter,
-#endif
-	.dma_playback = (void *)DMACH_I2S_OUT,
-	.dma_capture = (void *)DMACH_I2S_IN,
-};
-
 struct platform_device s3c_device_iis = {
 	.name		= "s3c24xx-iis",
 	.id		= -1,
@@ -590,7 +572,6 @@ struct platform_device s3c_device_iis = {
 	.dev		= {
 		.dma_mask		= &samsung_device_dma_mask,
 		.coherent_dma_mask	= DMA_BIT_MASK(32),
-		.platform_data		= &s3c_iis_platdata,
 	}
 };
 #endif /* CONFIG_PLAT_S3C24XX */
diff --git a/arch/arm/plat-samsung/include/plat/wakeup-mask.h b/arch/arm/plat-samsung/include/plat/wakeup-mask.h
index 43e4acd2e1c63a50605e5cc83750a85ab69585e3..bbfa84b0505a0171b6767a5ea0df5557b490a76b 100644
--- a/arch/arm/plat-samsung/include/plat/wakeup-mask.h
+++ b/arch/arm/plat-samsung/include/plat/wakeup-mask.h
@@ -38,7 +38,7 @@ struct samsung_wakeup_mask {
  * required to be correct before we enter sleep.
  */
 extern void samsung_sync_wakemask(void __iomem *reg,
-				  struct samsung_wakeup_mask *masks,
+				  const struct samsung_wakeup_mask *masks,
 				  int nr_masks);
 
 #endif /* __PLAT_WAKEUP_MASK_H */
diff --git a/arch/arm/plat-samsung/wakeup-mask.c b/arch/arm/plat-samsung/wakeup-mask.c
index 20c3d9117cc2539dadda086d0673dc86fe199d8a..b9de6b5433306bb88fce74f2b6efcfd977e4680c 100644
--- a/arch/arm/plat-samsung/wakeup-mask.c
+++ b/arch/arm/plat-samsung/wakeup-mask.c
@@ -20,7 +20,7 @@
 #include <plat/pm.h>
 
 void samsung_sync_wakemask(void __iomem *reg,
-			   struct samsung_wakeup_mask *mask, int nr_mask)
+			   const struct samsung_wakeup_mask *mask, int nr_mask)
 {
 	struct irq_data *data;
 	u32 val;