linux-kernel - Re: [PATCH/RFC 7/7] kernel: Force ACCESS

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Message-ID: <CA+55aFy+dunTcdgB4-BXsYiLDk9pf8b_L74ky-dMixpbX3JQQA@mail.gmail.com>
Date:	Mon, 24 Nov 2014 11:14:42 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	Alexei Starovoitov <alexei.starovoitov@...il.com>,
	David Howells <dhowells@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	linux-mips <linux-mips@...ux-mips.org>,
	linux-x86_64@...r.kernel.org,
	linux-s390 <linux-s390@...r.kernel.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH/RFC 7/7] kernel: Force ACCESS_ONCE to work only on scalar types

On Mon, Nov 24, 2014 at 11:07 AM, Christian Borntraeger
<borntraeger@...ibm.com> wrote:
>
> Looks really nice, but does not work with ACCESS_ONCE is on the left-hand side:

Oh, I forgot about that. And that was indeed why I had done that whole
helper macro originally, with ACCESS_ONCE() itself just being the
dereference of the pointer.

Duh.

                  Linus
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