Cc: Dave Young <hidave.darkstar@gmail.com>

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

kernel/printk.c

@@ -653,12 +653,13 @@ static int recursion_bug;
 static int new_text_line = 1;
 static char printk_buf[1024];
 
-int printk_delay_msec;
+int printk_delay_msec __read_mostly;
 
 static inline void printk_delay(void)
 {
 	if (unlikely(printk_delay_msec)) {
 		int m = printk_delay_msec;
+
 		while (m--) {
 			mdelay(1);
 			touch_nmi_watchdog();