From 6270da6f4d5a7e13cff98585d25c6742aec5a33c Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 11 Mar 2013 09:17:04 +0000
Subject: [PATCH] ACPI: suppress compiler warnings in button.c
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This patch fixes following compiler warnings when build via make W=1:

drivers/acpi/button.c:220:5: warning: no previous prototype for ‘acpi_lid_notifier_register’ [-Wmissing-prototypes]
drivers/acpi/button.c:226:5: warning: no previous prototype for ‘acpi_lid_notifier_unregister’ [-Wmissing-prototypes]
drivers/acpi/button.c:232:5: warning: no previous prototype for ‘acpi_lid_open’ [-Wmissing-prototypes]

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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