linux-kernel - Re: [PATCH 16/20] swsusp: do not use virt_to

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Message-ID: <20070308114712.GG5953@elf.ucw.cz>
Date:	Thu, 8 Mar 2007 12:47:12 +0100
From:	Pavel Machek <pavel@....cz>
To:	Vivek Goyal <vgoyal@...ibm.com>
Cc:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Reloc Kernel List <fastboot@...ts.osdl.org>,
	ebiederm@...ssion.com, akpm@...ux-foundation.org, ak@...e.de,
	hpa@...or.com, magnus.damm@...il.com, lwang@...hat.com,
	dzickus@...hat.com, rjw@...k.pl
Subject: Re: [PATCH 16/20] swsusp: do not use virt_to_page on kernel data address

Hi!

> > > Signed-off-by: Vivek Goyal <vgoyal@...ibm.com>
> > 
> > > +static int swsusp_header_init(void)
> > > +{
> > > +	swsusp_header = (struct swsusp_header*) __get_free_page(GFP_KERNEL);
> > > +	if (!swsusp_header)
> > > +		panic("Could not allocate memory for swsusp_header\n");
> > > +	return 0;
> > > +}
> > > +
> > > +core_initcall(swsusp_header_init);
> > 
> > I do not like the panic, but I guess it is okay as we are running
> > during boot? (Could you add a comment?) Otherwise ok.
> > 
> 
> Hi Pavel,
> 
> Yes, it is an initcall and this memory page will be allocated during
> boot time. Not very sure what comment to put there. To me it seems
> pretty obivious with "core_initcall".

I'd put "/* running at boot time, so allocation can't fail */" there
(and maybe just replace panic with BUG_ON), but I guess that's not
important.

ACK.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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