linux-kernel - Re: [S390] cio: Make ccw_dev_id_is

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Message-ID: <20061204152348.GA30961@filer.fsl.cs.sunysb.edu>
Date:	Mon, 4 Dec 2006 10:23:48 -0500
From:	Josef Sipek <jsipek@....cs.sunysb.edu>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, cornelia.huck@...ibm.com
Subject: Re: [S390] cio: Make ccw_dev_id_is_equal() more robust.

On Mon, Dec 04, 2006 at 03:56:24PM +0100, Martin Schwidefsky wrote:
... 
> diff -urpN linux-2.6/include/asm-s390/cio.h linux-2.6-patched/include/asm-s390/cio.h
> --- linux-2.6/include/asm-s390/cio.h	2006-12-04 14:50:48.000000000 +0100
> +++ linux-2.6-patched/include/asm-s390/cio.h	2006-12-04 14:51:00.000000000 +0100
> @@ -278,7 +278,10 @@ struct ccw_dev_id {
>  static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
>  				      struct ccw_dev_id *dev_id2)
>  {
> -	return !memcmp(dev_id1, dev_id2, sizeof(struct ccw_dev_id));
> +	if ((dev_id1->ssid == dev_id2->ssid) &&
> +	    (dev_id1->devno == dev_id2->devno))
> +		return 1;
> +	return 0;
>  }

Why not just:

return ((dev_id1->ssid == ......) && (...));

?

Josef "Jeff" Sipek.

-- 
UNIX is user-friendly ... it's just selective about who it's friends are
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