From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: strongly ordered comment on device memory in mmu.c
Date: Tue, 5 Jun 2012 00:59:29 +0100 [thread overview]
Message-ID: <20120604235929.GA29501@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <CAB9O=CMc7Lk0RCRL539qOGfx0nO6=JZp3gP1gL_HXvBzkxv3Ew@mail.gmail.com>
On Mon, Jun 04, 2012 at 03:16:31PM -0700, John Linn wrote:
> Hi,
>
> We see that the following comment appears to be wrong in that the
> memory is device memory rather than strongly ordered memory.
>
> ??????? [MT_DEVICE] = {?????????? /* Strongly ordered / ARMv6 shared device */
>
> If it's really just a bad comment we'll do a patch, but I was
> wondering if there's more to it such that the comment is correct?
On pre-ARMv6, it's strongly ordered. On post-ARMv6, it's "shared device".
The comment is accurate though possibly a little ambiguous; you're just
unaware of the history.
prev parent reply other threads:[~2012-06-04 23:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-04 22:16 strongly ordered comment on device memory in mmu.c John Linn
2012-06-04 23:59 ` Russell King - ARM Linux [this message]
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