From: Len Brown <len.brown@intel.com>
Date: Fri, 7 Jan 2011 00:46:40 +0000 (+0100)
Subject: ACPI: Use ioremap_cache()
X-Git-Tag: v2.6.38-rc1~68^2~18^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d5bbf00d251cc73223a71422d69e069dc2e0b8d;p=pandora-kernel.git

ACPI: Use ioremap_cache()

Although the temporary boot-time ACPI table mappings
were set up with CPU caching enabled, the permanent table
mappings and AML run-time region memory accesses were
set up with ioremap(), which on x86 is a synonym for
ioremap_nocache().

Changing this to ioremap_cache() improves performance as
seen when accessing the tables via acpidump,
or /sys/firmware/acpi/tables.  It should also improve
AML run-time performance.

No change on ia64.

Reported-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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