From: Andrea Shepard <andrea@persephoneslair.org>
Date: Mon, 20 Oct 2008 06:33:03 +0000 (-0700)
Subject: sparc64: Fix race in arch/sparc64/kernel/trampoline.S
X-Git-Tag: v2.6.27.5~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb9eeb9a65a21538faeb6ce2e78e662598087624;p=pandora-kernel.git

sparc64: Fix race in arch/sparc64/kernel/trampoline.S

[ Upstream commit e0037df3852b4b60edbe01f70f4968e4a9fdb272 ]

Make arch/sparc64/kernel/trampoline.S in 2.6.27.1 lock prom_entry_lock
when calling the PROM.  This prevents a race condition that I observed
causing a hang on startup on a 12-CPU E4500.

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Signed-off-by: Andrea Shepard <andrea@persephoneslair.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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