linux-kernel - Re: [PATCH] introduce __init

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Message-ID: <20070717085532.GL4375@moe.telargo.com>
Date:	Tue, 17 Jul 2007 10:55:32 +0200
From:	Domen Puncer <domen.puncer@...argo.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] introduce __init_exit function annotation

On 17/07/07 10:31 +0200, Adrian Bunk wrote:
> On Tue, Jul 17, 2007 at 10:02:48AM +0200, Domen Puncer wrote:
> > Introduce __init_exit, which is useful ie. for drivers that call
> > cleanup functions when they fail in __init functions.
> > 
> > 
> > Signed-off-by: Domen Puncer <domen.puncer@...argo.com>
> > ---
> >  include/linux/init.h |    2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > Index: work-powerpc.git/include/linux/init.h
> > ===================================================================
> > --- work-powerpc.git.orig/include/linux/init.h
> > +++ work-powerpc.git/include/linux/init.h
> > @@ -60,8 +60,10 @@
> >  
> >  #ifdef MODULE
> >  #define __exit		__attribute__ ((__section__(".exit.text")))
> > +#define __init_exit
> >  #else
> >  #define __exit		__attribute_used__ __attribute__ ((__section__(".exit.text")))
> > +#define __init_exit	__init
> >  #endif
> >  
> >  /* For assembly routines */
> 
> This doesn't work on architectures like i386 where __exit code is
> discarded at runtime.

If it's a module, then it shouldn't be discarded until unload anyway.
If it's in-kernel, then it'll be discarded as __init stuff.
I don't see a problem?

BTW. can you point me to reasoning for discarding __exit at runtime?


	Domen

> 
> cu
> Adrian
> 
> -- 
> 
>        "Is there not promise of rain?" Ling Tan asked suddenly out
>         of the darkness. There had been need of rain for many days.
>        "Only a promise," Lao Er said.
>                                        Pearl S. Buck - Dragon Seed
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