From: Rabin Vincent <rabin.vincent@stericsson.com>
Date: Wed, 9 Feb 2011 10:35:12 +0000 (+0100)
Subject: ARM: 6654/1: perf/oprofile: fix off-by-one in stack check
X-Git-Tag: v2.6.38-rc5~16^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb06199b1df492fcfbaedd2256b5054f944b664f;p=pandora-kernel.git

ARM: 6654/1: perf/oprofile: fix off-by-one in stack check

Since tail is the previous fp - 1, we need to compare the new fp with tail + 1
to ensure that we don't end up passing in the same tail again, in order to
avoid a potential infinite loop in the perf interrupt handler (which has been
observed to occur).  A similar fix seems to be needed in the OProfile code.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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