From: David S. Miller <davem@davemloft.net>
Date: Wed, 3 Mar 2010 17:06:03 +0000 (-0800)
Subject: sparc64: Make prom entry spinlock NMI safe.
X-Git-Tag: v2.6.34-rc1~202^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a4fd1e4922413cfdfa6c51a59efb720d904a5eb;p=pandora-kernel.git

sparc64: Make prom entry spinlock NMI safe.

If we do something like try to print to the OF console from an NMI
while we're already in OpenFirmware, we'll deadlock on the spinlock.

Use a raw spinlock and disable NMIs when we take it.

Signed-off-by: David S. Miller <davem@davemloft.net>
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