From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 29 Mar 2007 22:42:42 +0000 (+0100)
Subject: [MIPS] SMTC: Fix recursion in instant IPI replay code.
X-Git-Tag: v2.6.21-rc6~45^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a1e97ee2e025f116765c92409a3cf8f6cb07ad6;p=pandora-kernel.git

[MIPS] SMTC: Fix recursion in instant IPI replay code.

local_irq_restore -> raw_local_irq_restore -> irq_restore_epilog ->
	smtc_ipi_replay -> smtc_ipi_dq -> spin_unlock_irqrestore ->
	_spin_unlock_irqrestore -> local_irq_restore

The recursion does abort when there is no more IPI queued for a CPU, so
this isn't usually fatal which is why we got away with this for so long
until this was discovered by code inspection.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

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