From: Andi Kleen <ak@suse.de>
Date: Tue, 13 Dec 2005 06:17:09 +0000 (-0800)
Subject: [PATCH] i386/x86-64: Don't call change_page_attr with a spinlock held
X-Git-Tag: v2.6.15-rc6~91
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf5421c309bb89e5106452bc840983b1b4754d61;p=pandora-kernel.git

[PATCH] i386/x86-64: Don't call change_page_attr with a spinlock held

It's illegal because it can sleep.

Use a two step lookup scheme instead.  First look up the vm_struct, then
change the direct mapping, then finally unmap it.  That's ok because nobody
can change the particular virtual address range as long as the vm_struct is
still in the global list.

Also added some LinuxDoc documentation to iounmap.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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