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From: "H. Peter Anvin" <hpa@zytor.com>
To: Richard Weinberger <richard@nod.at>,
	Linux-Arch <linux-arch@vger.kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: VERIFY_READ/WRITE in uaccess.h?
Date: Mon, 11 May 2015 14:05:13 -0700	[thread overview]
Message-ID: <55511989.2010407@zytor.com> (raw)
In-Reply-To: <554F288C.3000300@nod.at>

On 05/10/2015 02:44 AM, Richard Weinberger wrote:
> Hi!
> 
> While cleaning up UML's uaccess code I've noticed that not a single architecture
> is using VERIFY_READ/WRITE in access_ok().
> One exception is UML, it uses the access type in one check which is in vain anyways.
> Also asm-generic/uaccess.h drops the type parameter silently.
> 
> Why do we still carry it around?
> 
> Is it because we want it for some future architecture which can benefit
> from it or just because nobody cared enough to do a tree-wide cleanup?
> I fear it is the latter... ;)
> 

Or, perhaps, nobody noticed?

	-hpa

  reply	other threads:[~2015-05-11 21:05 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-10  9:44 VERIFY_READ/WRITE in uaccess.h? Richard Weinberger
2015-05-11 21:05 ` H. Peter Anvin [this message]
2015-05-11 21:26   ` Richard Weinberger
2015-05-11 21:42   ` Linus Torvalds
2015-05-12  5:47     ` H. Peter Anvin

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