linux-kernel - [PATCH 16/17] drivers/x86: mark const init data with __initconst instead of _

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Date:	Thu, 29 Mar 2012 23:12:33 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kernel@...gutronix.de, Matthew Garrett <mjg59@...f.ucam.org>,
	Henrique de Moraes Holschuh <ibm-acpi@....eng.br>,
	platform-driver-x86@...r.kernel.org,
	ibm-acpi-devel@...ts.sourceforge.net
Subject: [PATCH 16/17] drivers/x86: mark const init data with __initconst instead of __initdata

As long as there is no other non-const variable marked __initdata in the
same compilation unit it doesn't hurt. If there were one however
compilation would fail with

	error: $variablename causes a section type conflict

because a section containing const variables is marked read only and so
cannot contain non-const variables.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc: Matthew Garrett <mjg59@...f.ucam.org>
Cc: Henrique de Moraes Holschuh <ibm-acpi@....eng.br>
Cc: platform-driver-x86@...r.kernel.org
Cc: ibm-acpi-devel@...ts.sourceforge.net
---
 drivers/platform/x86/dell-laptop.c   |    2 +-
 drivers/platform/x86/thinkpad_acpi.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index a05fc9c..882bfa4 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -94,7 +94,7 @@ static struct rfkill *wifi_rfkill;
 static struct rfkill *bluetooth_rfkill;
 static struct rfkill *wwan_rfkill;
 
-static const struct dmi_system_id __initdata dell_device_table[] = {
+static const struct dmi_system_id dell_device_table[] __initconst = {
 	{
 		.ident = "Dell laptop",
 		.matches = {
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d68c000..dc1900c 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -522,7 +522,7 @@ static acpi_handle ec_handle;
 
 #define TPACPI_HANDLE(object, parent, paths...)			\
 	static acpi_handle  object##_handle;			\
-	static const acpi_handle *object##_parent __initdata =	\
+	static const acpi_handle *object##_parent __initconst =	\
 						&parent##_handle; \
 	static char *object##_paths[] __initdata = { paths }
 
-- 
1.7.9.1

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