diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c
index 8b50cf4ddd6f04819e0c8a69bf4bf7eb9d28ddc5..80445ed33d9529d81d0f908d2b359192988c4986 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra30.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra30.c
@@ -102,12 +102,8 @@ static bool tegra30_cpu_core_power_down(struct cpuidle_device *dev,
 
 	smp_wmb();
 
-	save_cpu_arch_register();
-
 	cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
 
-	restore_cpu_arch_register();
-
 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);
 
 	return true;
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index 523604de666f6f6369330fabadbedb2b05750cf9..0494f739c95f935975787d563169d95eca40dbed 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -46,26 +46,11 @@
 #define PMC_CPUPWROFF_TIMER	0xcc
 
 #ifdef CONFIG_PM_SLEEP
-static unsigned int g_diag_reg;
 static DEFINE_SPINLOCK(tegra_lp2_lock);
 static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
 static struct clk *tegra_pclk;
 void (*tegra_tear_down_cpu)(void);
 
-void save_cpu_arch_register(void)
-{
-	/* read diagnostic register */
-	asm("mrc p15, 0, %0, c15, c0, 1" : "=r"(g_diag_reg) : : "cc");
-	return;
-}
-
-void restore_cpu_arch_register(void)
-{
-	/* write diagnostic register */
-	asm("mcr p15, 0, %0, c15, c0, 1" : : "r"(g_diag_reg) : "cc");
-	return;
-}
-
 static void set_power_timers(unsigned long us_on, unsigned long us_off)
 {
 	unsigned long long ticks;
@@ -119,8 +104,6 @@ static void restore_cpu_complex(void)
 	tegra_cpu_clock_resume();
 
 	flowctrl_cpu_suspend_exit(cpu);
-
-	restore_cpu_arch_register();
 }
 
 /*
@@ -145,8 +128,6 @@ static void suspend_cpu_complex(void)
 	tegra_cpu_clock_suspend();
 
 	flowctrl_cpu_suspend_enter(cpu);
-
-	save_cpu_arch_register();
 }
 
 void tegra_clear_cpu_in_lp2(int phy_cpu_id)