linux-kernel - Re: [patch] linux/preempt.h needs linux/thread

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Date:	Wed, 27 Dec 2006 18:07:02 +0900
From:	Horms <horms@...ge.net.au>
To:	Al Viro <viro@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, trivial@...nel.org
Subject: Re: [patch] linux/preempt.h needs linux/thread_info.h

On Wed, Dec 27, 2006 at 08:27:02AM +0000, Al Viro wrote:
> On Wed, Dec 27, 2006 at 05:17:02PM +0900, Horms wrote:
> > It seems that linux/preempt.h needs to include linux/thread_info.h
> > in order to access current_thread_info(), which is used in
> > preempt_count().
> > 
> > I guess that all callers of preempt_count() must include
> > both linux/thread_info.h and linux/preempt.h directly or indirectly,
> > as this does not cause a compile error. I noticed the problem while
> > working on an unrelated issue in xen-land.
> > 
> > Signed-off-by: Simon Horman <horms@...ge.net.au>
> > 
> > Index: linux-2.6/include/linux/preempt.h
> > ===================================================================
> > --- linux-2.6.orig/include/linux/preempt.h	2006-12-27 16:58:46.000000000 +0900
> > +++ linux-2.6/include/linux/preempt.h	2006-12-27 17:13:12.000000000 +0900
> > @@ -8,6 +8,7 @@
> >  
> >  #include <linux/thread_info.h>
> >  #include <linux/linkage.h>
> > +#include <linux/thread_info.h>
> 
> Huh?  It's just been included two lines above...

Sorry about that. I mucked around with this for a while
and ended up missing the obvious when doing the forward-port.

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/

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