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Date: Mon, 26 Feb 2007 19:41:31 +0000
From: Alan <alan@lxorguk.ukuu.org.uk>
To: Zach Brown <zab@zabbo.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Pekka Enberg <penberg@cs.helsinki.fi>,
       linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, hch@lst.de
Subject: Re: [RFC/PATCH] revokeat/frevoke system calls V5
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> I'm not sure.  Turning, for example, the statat(dir_fd, name == NULL)  
> error case into fstat(dir_fd) sounds like a way for apps, admittedly  
> buggy ones, to be surprised.  Maybe libc would be exptected to catch  
> the error before performing the shared system call?

At that point would it not be cheaper to have two system calls, the table
cost isn't very large.