https://github.com/torvalds/linux
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Tip revision: 52addcf9d6669fa439387610bc65c92fa0980cef authored by Linus Torvalds on 25 August 2014, 22:36:20 UTC
Linux 3.17-rc2
Tip revision: 52addcf
button.h
#ifndef ACPI_BUTTON_H
#define ACPI_BUTTON_H

#include <linux/notifier.h>

#if defined(CONFIG_ACPI_BUTTON) || defined(CONFIG_ACPI_BUTTON_MODULE)
extern int acpi_lid_notifier_register(struct notifier_block *nb);
extern int acpi_lid_notifier_unregister(struct notifier_block *nb);
extern int acpi_lid_open(void);
#else
static inline int acpi_lid_notifier_register(struct notifier_block *nb)
{
	return 0;
}
static inline int acpi_lid_notifier_unregister(struct notifier_block *nb)
{
	return 0;
}
static inline int acpi_lid_open(void)
{
	return 1;
}
#endif /* defined(CONFIG_ACPI_BUTTON) || defined(CONFIG_ACPI_BUTTON_MODULE) */

#endif /* ACPI_BUTTON_H */
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