On Wed, 26 Dec 2007, H. Peter Anvin wrote:

quoted text
> Julia Lawall wrote:
> > From: Julia Lawall <julia@diku.dk>
> > 
> > The functions time_before, time_before_eq, time_after, and time_after_eq
> > are more robust for comparing jiffies against other values.
> > 
> 
> More robust, how?  You already almost introduced a bug here...

I'm just summarizing the comment that goes with the definition of the 
time_after etc functions:

include/linux/jiffies.h:88
/*
 *	These inlines deal with timer wrapping correctly. You are 
 *	strongly encouraged to use them
 *	1. Because people otherwise forget
 *	2. Because if the timer wrap changes in future you won't have to
 *	   alter your driver code.
 *

julia
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