linux-kernel - Re: [PATCH] avoid unnecessary assignment in lookup

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Date:	Sun, 14 Dec 2008 11:12:33 -0800
From:	Greg KH <greg@...ah.com>
To:	Coly Li <coly.li@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] avoid unnecessary assignment in lookup_bdev()

On Mon, Dec 15, 2008 at 02:33:20AM +0800, Coly Li wrote:
> In normal cases, lookup_bdev() should return successfully, therefore it's not a good idea to always
> assign error values before checking truth/false conditions. This patch modifies code to only assign
> error value in necessary false conditions.
> 
> If I missed something, please correct me.

I don't understand, is there some way that the current code could
incorrectly return an error value?

Is your change somehow faster?  I don't think this is on any fast-path
code, right?

thanks,

greg k-h
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