From: Michael Ellerman <michael@ellerman.id.au>
Date: Wed, 30 Apr 2008 03:21:45 +0000 (+1000)
Subject: [POWERPC] Make emergency stack safe for current_thread_info() use
X-Git-Tag: v2.6.26-rc1~108^2~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3243d87441bf7f97c5c9f7dd46b35f5783ec6740;p=pandora-kernel.git

[POWERPC] Make emergency stack safe for current_thread_info() use

The current_thread_info() macro, used by preempt_count(), assumes the
base address and size of the stack are THREAD_SIZE aligned.

The emergency stack currently isn't either of these things, which
could potentially cause problems anytime we're running on the
emergency stack.  That includes when we detect a bad kernel stack
pointer, and also during early_setup_secondary().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

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