From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-arch@vger.kernel.org, Stefan Richter <stefanr@s5r6.in-berlin.de>
Subject: Re: PAGE_KERNEL_RO
Date: Thu, 13 Jan 2011 11:11:24 +1100 [thread overview]
Message-ID: <1294877484.9586.66.camel@pasglop> (raw)
In-Reply-To: <20110112160722.6486a6c2.akpm@linux-foundation.org>
On Wed, 2011-01-12 at 16:07 -0800, Andrew Morton wrote:
> drivers/firewire/ohci.c now needs PAGE_KERNEL_RO, but many
> architectures don't implement it. Broke my sparc64 build.
Some architectures actually cannot implement it even... at least some
variants of powerpc MMUs don't have a combination of protection bits
that allow a kernel-only RO mapping (yeah odd).
Cheers,
Ben.
next prev parent reply other threads:[~2011-01-13 0:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 0:07 PAGE_KERNEL_RO Andrew Morton
2011-01-13 0:11 ` Benjamin Herrenschmidt [this message]
2011-01-13 6:34 ` PAGE_KERNEL_RO Stefan Richter
[not found] ` <522C1DF17AF50042AD8AE87F7887BD3D01E1655529@exch.hq.tensilica.com>
2011-01-13 7:27 ` PAGE_KERNEL_RO Clemens Ladisch
2011-01-13 9:04 ` PAGE_KERNEL_RO James Bottomley
2011-01-13 9:12 ` PAGE_KERNEL_RO Clemens Ladisch
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