linux-kernel - Re: [patch 05/38] s390: hibernation support for s390

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Message-ID: <20090609195903.GB1388@ucw.cz>
Date:	Tue, 9 Jun 2009 21:59:03 +0200
From:	Pavel Machek <pavel@....cz>
To:	Hans-Joachim Picht <hans@...ux.vnet.ibm.com>
Cc:	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [patch 05/38] s390: hibernation support for s390

On Tue 2009-06-09 15:34:02, Hans-Joachim Picht wrote:
> On Mon, 8 Jun 2009 08:44:51 +0200
> Pavel Machek <pavel@....cz> wrote:
> 
> 
> > > Index: linux-2.6/arch/s390/power/swsusp.c
> > > ===================================================================
> > > --- /dev/null
> > > +++ linux-2.6/arch/s390/power/swsusp.c
> > > @@ -0,0 +1,31 @@
> > > +/*
> > > + * Support for suspend and resume on s390
> > > + *
> > > + * Copyright IBM Corp. 2009
> > > + *
> > > + * Author(s): Hans-Joachim Picht <hans@...ux.vnet.ibm.com>
> > > + *
> > > + */
> > > +
> > > +#include <linux/suspend.h>
> > > +#include <linux/gfp.h>
> > > +#include <linux/cpu.h>
> > > +#include <linux/smp.h>
> > > +#include <linux/cpumask.h>
> > > +#include <asm/ipl.h>
> > > +#include <asm/processor.h>
> > 
> > Empty functions do not need 1000 includes...
> 
> Thanks for spotting this. I will remove these.
>  
> > > +/*
> > > + * save CPU registers before creating a hibernation image and
> > > before
> > > + * restoring the memory state from it
> > > + */
> > > +void save_processor_state(void)
> > > +{
> > > +}
> > > +
> > > +/*
> > > + * restore the contents of CPU registers
> > > + */
> > > +void restore_processor_state(void)
> > > +{
> > > +}
> > 
> > ...and explaining why the functions can be emmpty would be nice.
> 
> I integrated the code for this in the assembly backend in the
> swsusp_arch_suspend & swsusp_arch_resume functions.

I guessed so. Maybe it is worth a comment?

-- 
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