linux-kernel - Re: [PATCH] ufs: [bl]e*_add

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Message-ID: <20080213182116.GA6150@joi>
Date:	Wed, 13 Feb 2008 19:21:21 +0100
From:	Marcin Slusarz <marcin.slusarz@...il.com>
To:	Roel Kluin <12o3l@...cali.nl>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Evgeniy Dushistov <dushistov@...l.ru>
Subject: Re: [PATCH] ufs: [bl]e*_add_cpu conversion

On Wed, Feb 13, 2008 at 10:41:44AM +0100, Roel Kluin wrote:
> marcin.slusarz@...il.com wrote:
> > replace all:
> > big/little_endian_variable = cpu_to_[bl]eX([bl]eX_to_cpu(big/little_endian_variable) +
> > 					expression_in_cpu_byteorder);
> > with:
> > 	[bl]eX_add_cpu(&big/little_endian_variable, expression_in_cpu_byteorder);
> 
> you may also want these:
> ---
> [bl]e_add_cpu conversion in return
> 
> Signed-off-by: Roel Kluin <12o3l@...cali.nl>
Acked-by: Marcin Slusarz <marcin.slusarz@...il.com>

> ---
> diff --git a/fs/ufs/swab.h b/fs/ufs/swab.h
> index 1683d2b..a1e3000 100644
> --- a/fs/ufs/swab.h
> +++ b/fs/ufs/swab.h
> @@ -44,18 +44,22 @@ static __inline u32
>  fs64_add(struct super_block *sbp, u32 *n, int d)
>  {
>  	if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
> -		return *n = cpu_to_le64(le64_to_cpu(*n)+d);
> +		le64_add_cpu(n, d);
>  	else
> -		return *n = cpu_to_be64(be64_to_cpu(*n)+d);
> +		be64_add_cpu(n, d);
> +
> +	return *n;
>  }
>  
>  static __inline u32
>  fs64_sub(struct super_block *sbp, u32 *n, int d)
>  {
>  	if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
> -		return *n = cpu_to_le64(le64_to_cpu(*n)-d);
> +		le64_add_cpu(n, -d);
>  	else
> -		return *n = cpu_to_be64(be64_to_cpu(*n)-d);
> +		be64_add_cpu(n, -d);
> +
> +	return *n;
>  }
>  
>  static __inline u32
> 
--
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