linux-kernel - Re: [patch] lockdep: fix seqlock

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Date:	Tue, 12 Dec 2006 21:50:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...l.org>
Cc:	Linus Torvalds <torvalds@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: [patch] lockdep: fix seqlock_init()


* Andrew Morton <akpm@...l.org> wrote:

> On Tue, 12 Dec 2006 12:10:28 +0100
> Ingo Molnar <mingo@...e.hu> wrote:
> 
> > +#define seqlock_init(x)					\
> > +	do {						\
> > +		(x)->sequence = 0;			\
> > +		spin_lock_init(&(x)->lock);		\
> > +	} while (0)
> 
> This does not have to be a macro, does it?

Maybe it could be an __always_inline inline function (it has to be 
inlined to get the callsite based lock class key right) - but i'm not 
sure about the include file dependencies. Will probably work out fine as 
seqlock.h is supposed to be a late one in the order of inclusion - but i 
didnt want to make a blind bet.

	Ingo
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