linux-kernel - Re: time_is_after

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Message-ID: <20081216144608.GA19675@cmpxchg.org>
Date:	Tue, 16 Dec 2008 15:46:08 +0100
From:	Johannes Weiner <hannes@...xchg.org>
To:	"Peter T. Breuer" <ptb@....it.uc3m.es>
Cc:	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: time_is_after_jiffies misnomer

On Tue, Dec 16, 2008 at 12:31:41PM +0100, Peter T. Breuer wrote:
> 
> I thought at first that
> 
>     time_is_after_jiffies(foo)
> 
> meant that the current time is later than foo jiffies.

'foo jiffies'?

It behaves like all the other time_(after|before) macros.  "Compare a
given time T against some other time X".

T is always the first argument to these macros, it's never the current
time.  This is consistent.

And jiffies, the X here, is a well-known global variable. :)

The banner comment above the macro group should have clarified the
misunderstanding, btw.

	Hannes
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