linux-kernel - Re: [RFC 0/3] Examples for the new sparse context tracking functionality

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Message-ID: <20080421145525.GB9153@linux.vnet.ibm.com>
Date:	Mon, 21 Apr 2008 07:55:25 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	linux-kernel@...r.kernel.org, Josh Triplett <josh@...edesktop.org>,
	linux-wireless@...r.kernel.org, linux-sparse@...r.kernel.org
Subject: Re: [RFC 0/3] Examples for the new sparse context tracking functionality

On Mon, Apr 21, 2008 at 10:25:55AM +0200, Johannes Berg wrote:
> 
> > At some point in the future, we might want to distinguish between
> > the different flavors of RCU -- except that there is already common
> > code that doesn't care which flavor of RCU is in use, as long as
> > some sort of RCU is present.  So make that "some point in the distant
> > future"...
> 
> No big deal, just declare
> 
> my_specific_rcu_get() __acquires(RCU) __acquires(specificRCU);
> 
> and then annotate whatever needs the specific RCU type with
> __requires(specificRCU)

Cute!!!  I didn't realize you could mark a single interface with
multiple __acquires() markings.

So if there is at least one match, sparse is happy?

							Thanx, Paul
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