From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, Doug Thompson <dthompson@lnxi.com>
Subject: Re: PATCH: EDAC - clean up atomic stuff
Date: Tue, 01 Nov 2005 12:46:39 +0000 [thread overview]
Message-ID: <1130849199.9145.94.camel@localhost.localdomain> (raw)
In-Reply-To: <m18xw88thu.fsf@ebiederm.dsl.xmission.com>
> There is a much more serious bug there as well. The code as it
> exists is flatly impossible on x86_64 and some other architectures
> as they do not support kmap. It is also broken on x86 as grain can
All platforms have kmap. On systems without "highmem" the kmap functions
simply return the page address of the existing permanent physical
mapping for the page. See include/linux/highmem.h
So it's all fine and larger than page sized scrubs can be added to the
core code when they are needed.
Alan
next prev parent reply other threads:[~2005-11-01 12:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-21 13:40 PATCH: EDAC - clean up atomic stuff Alan Cox
2005-10-28 16:33 ` Eric W. Biederman
2005-10-31 15:30 ` Alan Cox
2005-10-31 16:34 ` Eric W. Biederman
2005-10-31 20:02 ` Andrew Morton
2005-11-01 12:03 ` Eric W. Biederman
2005-11-01 12:46 ` Alan Cox [this message]
2005-11-01 12:38 ` Eric W. Biederman
2005-11-02 5:26 ` Andrew Morton
2005-11-02 16:02 ` Alan Cox
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