diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 80fa434..3b97a5e 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -54,10 +54,10 @@
 #define US_TO_PM_TIMER_TICKS(t)		((t * (PM_TIMER_FREQUENCY/1000)) / 1000)
 #define C2_OVERHEAD			4	/* 1us (3.579 ticks per us) */
 #define C3_OVERHEAD			4	/* 1us (3.579 ticks per us) */
-static void (*pm_idle_save) (void);
+static void (*pm_idle_save) (void) __read_mostly;
 module_param(max_cstate, uint, 0644);
 
-static unsigned int nocst = 0;
+static unsigned int nocst __read_mostly;
 module_param(nocst, uint, 0000);
 
 /*
@@ -67,7 +67,7 @@
  * 100 HZ: 0x0000000F: 4 jiffies = 40ms
  * reduce history for more aggressive entry into C3
  */
-static unsigned int bm_history =
+static unsigned int bm_history __read_mostly =
     (HZ >= 800 ? 0xFFFFFFFF : ((1U << (HZ / 25)) - 1));
 module_param(bm_history, uint, 0644);
 /* --------------------------------------------------------------------------
@@ -1081,7 +1081,7 @@
 			      struct acpi_device *device)
 {
 	acpi_status status = 0;
-	static int first_run = 0;
+	static int first_run;
 	struct proc_dir_entry *entry = NULL;
 	unsigned int i;