diff -urN 2.4.10/kernel/time.c xtime/kernel/time.c
--- 2.4.10/kernel/time.c	Thu Nov 16 15:37:43 2000
+++ xtime/kernel/time.c	Sun Sep 23 22:20:29 2001
@@ -38,7 +38,18 @@
 
 static void do_normal_gettime(struct timeval * tm)
 {
+	extern rwlock_t xtime_lock;
+	unsigned long flags;
+	/*
+	 * Inspired by arch/.../kernel/time.c in which do_gettimeofday also
+	 * locks xtime_lock, do_normal_gettime should do the same. After all
+	 * access to xtime isn't atomic. -rolf 20010923
+	 */
+	read_lock_irqsave(&xtime_lock, flags);
+
         *tm=xtime;
+
+	read_unlock_irqrestore(&xtime_lock, flags);
 }
 
 void (*do_get_fast_time)(struct timeval *) = do_normal_gettime;