linux-kernel - [RFC PATCH 6/6] ACPICA: Tables: Enable default 64-bit FADT addresses favor.

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Message-Id: <815bd8a45e4bd1d78e0ed605f6f542e22c277da6.1401210685.git.lv.zheng@intel.com>
Date:	Wed, 28 May 2014 01:29:08 +0800
From:	Lv Zheng <zetalog@...il.com>
To:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>
Cc:	Lv Zheng <zetalog@...il.com>, Lv Zheng <lv.zheng@...el.com>,
	<linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org,
	Oswald Buddenhagen <ossi@....org>
Subject: [RFC PATCH 6/6] ACPICA: Tables: Enable default 64-bit FADT addresses favor.

From: Lv Zheng <lv.zheng@...el.com>

With enough protections, this patch re-enables 64-bit FADT addresses by
default. If regressions are reported against such change, this patch should
be bisected and reverted.
Note that 64-bit FACS favor and 64-bit firmware waking vector favor are
excluded by this commit in order not to break OSPMs. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@...el.com>
Cc: Oswald Buddenhagen <ossi@....org>
---
 include/acpi/acpixf.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 0f79659..6a9100a 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -188,9 +188,9 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_do_not_use_xsdt, FALSE);
  * address. Although ACPICA adheres to the ACPI specification which
  * requires the use of the corresponding 64-bit address if it is non-zero,
  * some machines have been found to have a corrupted non-zero 64-bit
- * address. Default is TRUE, favor the 32-bit addresses.
+ * address. Default is FALSE, do not favor the 32-bit addresses.
  */
-ACPI_INIT_GLOBAL(u8, acpi_gbl_use32_bit_fadt_addresses, TRUE);
+ACPI_INIT_GLOBAL(u8, acpi_gbl_use32_bit_fadt_addresses, FALSE);
 
 /*
  * Optionally use 32-bit FACS table addresses.
-- 
1.7.10

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