From 7bbb890358b96cb6f77adc6815f2072bdf813d5d Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Tue, 8 Feb 2011 23:37:42 +0100
Subject: [PATCH] ACPI: Change acpi_ioremap_lock into a mutex

There's no reason why acpi_ioremap_lock has to be a spinlock,
because all of the functions it is used in may sleep anyway and
there's no reason why it should be locked with interrupts off.
Use a mutex instead (that's going to allow us to put some more
operations under the lock later).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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