--- linux-2.6.19/include/linux/jiffies.h	2006-12-12 00:32:00.000000000 +0100
+++ linux-2.6.19-ed/include/linux/jiffies.h	2006-12-12 00:41:40.000000000 +0100
@@ -80,6 +80,11 @@
  */
 extern u64 __jiffy_data jiffies_64;
 extern unsigned long volatile __jiffy_data jiffies;
+/*
+ * Some subsystems need small deltas and can store 32 bits timestamps
+ * instead of 'long', to save space on 64bits platforms.
+ */
+#define jiffies_32 ((u32)jiffies)
 
 #if (BITS_PER_LONG < 64)
 u64 get_jiffies_64(void);
@@ -131,6 +136,22 @@ static inline u64 get_jiffies_64(void)
 #define time_before_eq64(a,b)	time_after_eq64(b,a)
 
 /*
+ * Same as above, but does so with 32bits types.
+ * These must be used when using jiffies_32
+ */
+#define time_after32(a,b)	\
+	(typecheck(__u32, a) &&	\
+	 typecheck(__u32, b) && \
+	 ((__s32)(b) - (__s32)(a) < 0))
+#define time_before32(a,b)	time_after32(b,a)
+
+#define time_after_eq32(a,b)	\
+	(typecheck(__u32, a) && \
+	 typecheck(__u32, b) && \
+	 ((__s32)(a) - (__s32)(b) >= 0))
+#define time_before_eq32(a,b)	time_after_eq32(b,a)
+
+/*
  * Have the 32 bit jiffies value wrap 5 minutes after boot
  * so jiffies wrap bugs show up earlier.
  */