linux-kernel - Re: [PATCH -tip] x86: acpi/sleep.c saved

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Message-Id: <200904121925.59814.rjw@sisk.pl>
Date:	Sun, 12 Apr 2009 19:25:59 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>, Ingo Molnar <mingo@...e.hu>
Cc:	Jaswinder Singh Rajput <jaswinder@...nel.org>,
	Sam Ravnborg <sam@...nborg.org>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, josh@...edesktop.org
Subject: Re: [PATCH -tip] x86: acpi/sleep.c saved_magic fix overflow

On Friday 10 April 2009, Pavel Machek wrote:
> On Sat 2009-04-11 01:19:41, Jaswinder Singh Rajput wrote:
> > On Fri, 2009-04-10 at 21:29 +0200, Sam Ravnborg wrote:
> > > On Sat, Apr 11, 2009 at 12:46:56AM +0530, Jaswinder Singh Rajput wrote:
> > > > Sorry, I was confused by this sparse warning on 64 bit box:
> > > > 
> > > > CHECK   arch/x86/kernel/acpi/sleep.c
> > > >  arch/x86/kernel/acpi/sleep.c:107:16: warning: constant 0x123456789abcdef0 is so big it is long
> > > > 
> > > > atleast I found problem in sparse ;-)
> > > 
> > > Sparse tells you that the constant is so big it is long - correct.
> > > So rather than being implicit appending an L would make sparse happy.
> > > 
> > > So please use the constant 0x123456789abcdef0L and I think sparse is silenced.
> > > And code/functionality is the same.
> > > 
> > 
> > Yes, this fixes the sparse warning, Thanks :-)
> 
> Acked-by: Pavel Machek <pavel@....cz>

OK

Ingo, are you going to take it or should I handle it?

Rafael


> > diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
> > index 7c243a2..3445d0f 100644
> > --- a/arch/x86/kernel/acpi/sleep.c
> > +++ b/arch/x86/kernel/acpi/sleep.c
> > @@ -104,7 +104,7 @@ int acpi_save_state_mem(void)
> >         initial_gs = per_cpu_offset(smp_processor_id());
> >  #endif
> >         initial_code = (unsigned long)wakeup_long64;
> > -       saved_magic = 0x123456789abcdef0;
> > +       saved_magic = 0x123456789abcdef0L;
> >  #endif /* CONFIG_64BIT */
> >  
> >         return 0;
> > 
> > --
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