[PATCH RFC] add time_after_now and other macros which compare with jiffies

[Dave Young <hidave.darkstar@gmail.com>]

Most of time_after like macros users just compare jiffies and
another number, so here add some other _now macros to do it.

Another aproach is changing original time_ macros to use jiffies to compare,
add a generic compare macro like time_compare(a, b)

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>

---
jiffies.h |    8 ++++++++
1 file changed, 8 insertions(+)

diff -upr linux/include/linux/jiffies.h linux.new/include/linux/jiffies.h
--- linux/include/linux/jiffies.h	2008-03-07 10:40:04.000000000 +0800
+++ linux.new/include/linux/jiffies.h	2008-03-07 10:50:12.000000000 +0800
@@ -134,6 +134,14 @@ static inline u64 get_jiffies_64(void)
 	 ((__s64)(a) - (__s64)(b) >= 0))
 #define time_before_eq64(a,b)	time_after_eq64(b,a)
 
+#define time_after_now(a) time_after(jiffies, a)
+
+#define time_before_now(a) time_before(jiffies, a)
+
+#define time_after_eq_now(a) time_after_eq(jiffies, a)
+
+#define time_before_eq_now(a) time_before_eq(jiffies, a)
+
 /*
  * Have the 32 bit jiffies value wrap 5 minutes after boot
  * so jiffies wrap bugs show up earlier.