linux-kernel - Re: [patch 8/8] vfs: create file_remove

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Message-Id: <E1K2uQk-0001dO-G7@pomaz-ex.szeredi.hu>
Date:	Sun, 01 Jun 2008 22:45:30 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	hch@...radead.org
CC:	miklos@...redi.hu, linux-fsdevel@...r.kernel.org,
	hch@...radead.org, viro@...IV.linux.org.uk,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 8/8] vfs: create file_remove_suid() helper

> > From: Miklos Szeredi <mszeredi@...e.cz>
> > 
> > All calls to remove_suid() are made with a file pointer.  This is not
> > accidental: similarly to file_update_time(), this function is called
> > when the file is written.
> > 
> > So simplify callers by passing the file pointer instead of the dentry.
> 
> It's not simplifying anything at all.

Yes it is, read the sentence carefully.

>  You just move the pointer
> derefence down one step the callchain without any need.

Which means, that that pointer dereference will be done once instead
of in each caller, no?  It's a gain (albeit a small one) is in code
cleanliness, and possibly in generated code size.

Miklos
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