From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Thu, 9 Jun 2011 09:12:41 +0000 (+0100)
Subject: Revert "ARM: 6944/1: mm: allow ASID 0 to be allocated to tasks"
X-Git-Tag: v3.0-rc4~35^2~10
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a0a54d37b4b1d1f55d1e81e8ffc223bb85472fa3;p=pandora-kernel.git

Revert "ARM: 6944/1: mm: allow ASID 0 to be allocated to tasks"

This reverts commit 45b95235b0ac86cef2ad4480b0618b8778847479.

Will Deacon reports that:

 In 52af9c6c ("ARM: 6943/1: mm: use TTBR1 instead of reserved context ID")
 I updated the ASID rollover code to use only the kernel page tables
 whilst updating the ASID.

 Unfortunately, the code to restore the user page tables was part of a
 later patch which isn't yet in mainline, so this leaves the code
 quite broken.

We're also in the process of eliminating __ARCH_WANT_INTERRUPTS_ON_CTXSW
from ARM, so lets revert these until we can properly sort out what we're
doing with the context switching.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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