linux-kernel - Re: [PATCH -mm] timer: parenthesis fix in tbase_get

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Message-ID: <20070509053144.GA995@ff.dom.local>
Date:	Wed, 9 May 2007 07:31:44 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Venki Pallipadi <venkatesh.pallipadi@...el.com>,
	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...sign.ru>
Subject: Re: [PATCH -mm] timer: parenthesis fix in tbase_get_deferrable() etc.

On Tue, May 08, 2007 at 04:33:58PM -0700, Andrew Morton wrote:
> On Tue, 8 May 2007 12:33:48 +0200
> Jarek Poplawski <jarkao2@...pl> wrote:
> 
> > 
> > Signed-off-by: Jarek Poplawski <jarkao2@...pl>
> > 
> > ---
> > 
> > diff -Nurp 2.6.21-mm1-/kernel/timer.c 2.6.21-mm1/kernel/timer.c
> > --- 2.6.21-mm1-/kernel/timer.c	2007-05-08 11:54:48.000000000 +0200
> > +++ 2.6.21-mm1/kernel/timer.c	2007-05-08 12:05:11.000000000 +0200
> > @@ -92,24 +92,24 @@ static DEFINE_PER_CPU(tvec_base_t *, tve
> >  /* Functions below help us manage 'deferrable' flag */
> >  static inline unsigned int tbase_get_deferrable(tvec_base_t *base)
> >  {
> > -	return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG);
> > +	return (unsigned int)((unsigned long)base & TBASE_DEFERRABLE_FLAG);
> >  }
...
> The change makes sense, but does it actually "fix" anything?
> 

Yes - this first place fixes logical error, so it's a sin
- even if not punishable in practice. (It's also unnecessary
test for long to int conversion.)

Other changes are only BTW.

Regards,
Jarek P.
-
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