From: Guillaume Autran <gautran@mrv.com>
Date: Wed, 13 Jul 2005 08:10:45 +0000 (-0700)
Subject: [PATCH] ppc32: fix destroy_context() race condition
X-Git-Tag: v2.6.13-rc4~124
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ddca3b80cef36cc668f924ef5154a79acb19ebd7;p=pandora-kernel.git

[PATCH] ppc32: fix destroy_context() race condition

Fix for a race condition when a task gets preempted by another task while
executing the destroy_context(...) in a FEW_CONTEXTS environment.
mm->context == NO_CONTEXT but the context_map may indicate all contexts are
in use.

The solution to this problem is to disable kernel preemption while
destroying a MMU context.

Signed-off-by: Guillaume Autran <gautran@mrv.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

Reading git-diff-tree failed