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

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Message-ID: <20090609153402.58e6b841@blc4eb509856389.ibm.com>
Date:	Tue, 9 Jun 2009 15:34:02 +0200
From:	Hans-Joachim Picht <hans@...ux.vnet.ibm.com>
To:	Pavel Machek <pavel@....cz>
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 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.

With best regards,

    --Hans
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