From: Bernd Schmidt <bernds_cb1@t-online.de>
Date: Mon, 25 Aug 2008 10:41:15 +0000 (+0800)
Subject: Blackfin arch: fix bug - MPU crashes under stress
X-Git-Tag: v2.6.27-rc5~2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3d9b7a5ce534f3963afcf8f4777267e5899fe007;p=pandora-kernel.git

Blackfin arch: fix bug - MPU crashes under stress

Bug Description:
a customer reported under IRQ stress, running applications may
wrongly trigger an ICPLB miss and be killed. after playing a
bit more, here's a test case that may be triggering the same bug.

Fixing:
After modifying page protections, only modify the active CPLBs if the
protection change was made for the active mm.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---

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