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

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Message-Id: <20070508163358.9cc482a8.akpm@linux-foundation.org>
Date:	Tue, 8 May 2007 16:33:58 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jarek Poplawski <jarkao2@...pl>
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, 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);
>  }
>  
>  static inline tvec_base_t *tbase_get_base(tvec_base_t *base)
>  {
> -	return ((tvec_base_t *)((unsigned long)base & ~TBASE_DEFERRABLE_FLAG));
> +	return (tvec_base_t *)((unsigned long)base & ~TBASE_DEFERRABLE_FLAG);
>  }
>  
>  static inline void timer_set_deferrable(struct timer_list *timer)
>  {
> -	timer->base = ((tvec_base_t *)((unsigned long)(timer->base) |
> -	                               TBASE_DEFERRABLE_FLAG));
> +	timer->base = (tvec_base_t *)((unsigned long)timer->base |
> +	                               TBASE_DEFERRABLE_FLAG);
>  }
>  
>  static inline void
>  timer_set_base(struct timer_list *timer, tvec_base_t *new_base)
>  {
> -	timer->base = (tvec_base_t *)((unsigned long)(new_base) |
> +	timer->base = (tvec_base_t *)((unsigned long)new_base |
>  	                              tbase_get_deferrable(timer->base));
>  }
>  

The change makes sense, but does it actually "fix" anything?
-
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