linux-kernel - Re: [PATCH] Fix cpuset sched_relax_domain

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Message-ID: <6599ad830805061841n57232824s451c4e8788b7864d@mail.gmail.com>
Date:	Tue, 6 May 2008 18:41:39 -0700
From:	"Paul Menage" <menage@...gle.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	"Hidetoshi Seto" <seto.hidetoshi@...fujitsu.com>,
	"Paul Jackson" <pj@....com>, "Ingo Molnar" <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix cpuset sched_relax_domain_level control file

On Tue, May 6, 2008 at 6:38 PM, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Tue, 06 May 2008 18:08:17 -0700 Paul Menage <menage@...gle.com> wrote:
>
>  > -static int update_relax_domain_level(struct cpuset *cs, char *buf)
>  > +static int update_relax_domain_level(struct cpuset *cs, s64 val)
>  >  {
>  > -     int val = simple_strtol(buf, NULL, 10);
>  > -
>  > -     if (val < 0)
>  > +     if ((int)val < 0)
>  >               val = -1;
>  >
>
>  Are you sure about the typecast here?  If `val' has a value of say
>  0x0000_ffff_ffff_ffff then I assume the casted value will be negative, only
>  it wasn't?
>

It seems like the simplest approach - if it's outside the range of a
positive int, set it to -1.

Paul
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