From: David S. Miller <davem@davemloft.net>
Date: Wed, 9 Dec 2009 09:43:45 +0000 (-0800)
Subject: sparc64: Fix stack debugging IRQ stack regression.
X-Git-Tag: v2.6.33-rc1~80^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=166e553a575f09485f6d0df8a1ef3c5991f7d953;p=pandora-kernel.git

sparc64: Fix stack debugging IRQ stack regression.

Commit 4f70f7a91bffdcc39f088748dc678953eb9a3fbd
(sparc64: Implement IRQ stacks.) has two bugs.

First, the softirq range check forgets to subtract STACK_BIAS
before comparing with %sp.  Next, on failure the wrong label
is jumped to, resulting in a bogus stack being loaded.

Reported-by: Igor Kovalenko <igor.v.kovalenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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