[ARM] Power management updates

This provides an element of core PM support to ARM, providing an APM
like user space interface, and separating the core PM support from
the SA1100 PM implementation.

arch/arm/kernel/Makefile

@@ -16,6 +16,7 @@ obj-n		:=
 obj-		:=
 
 obj-$(CONFIG_APM)		+= apm.o
+obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_ARCH_ACORN)	+= ecard.o time-acorn.o
 obj-$(CONFIG_ARCH_CLPS7500)	+= time-acorn.o
 obj-$(CONFIG_FOOTBRIDGE)	+= isa.o

arch/arm/kernel/apm.c

+/*
+ * bios-less APM driver for ARM Linux 
+ *  Jamey Hicks <jamey@crl.dec.com>
+ *  adapted from the APM BIOS driver for Linux by Stephen Rothwell (sfr@linuxcare.com)
+ *
+ * APM 1.2 Reference:
+ *   Intel Corporation, Microsoft Corporation. Advanced Power Management
+ *   (APM) BIOS Interface Specification, Revision 1.2, February 1996.
+ *
+ * [This document is available from Microsoft at:
+ *    http://www.microsoft.com/hwdev/busbios/amp_12.htm]
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/miscdevice.h>
+#include <linux/apm_bios.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/completion.h>
+
+#include <asm/system.h>
+
+/*
+ * The apm_bios device is one of the misc char devices.
+ * This is its minor number.
+ */
+#define APM_MINOR_DEV	134
+
+/*
+ * See Documentation/Config.help for the configuration options.
+ *
+ * Various options can be changed at boot time as follows:
+ * (We allow underscores for compatibility with the modules code)
+ *	apm=on/off			enable/disable APM
+ */
+
+/*
+ * Maximum number of events stored
+ */
+#define APM_MAX_EVENTS		20
+
+/*
+ * The per-file APM data
+ */
+struct apm_user {
+	struct list_head	list;
+
+	int			suser: 1;
+	int			writer: 1;
+	int			reader: 1;
+	int			suspend_wait: 1;
+	int			suspend_result;
+
+	int			suspends_pending;
+	int			standbys_pending;
+	unsigned int		suspends_read;
+	unsigned int		standbys_read;
+
+	int			event_head;
+	int			event_tail;
+	apm_event_t		events[APM_MAX_EVENTS];
+};
+
+/*
+ * Local variables
+ */
+static int suspends_pending;
+static int standbys_pending;
+static int apm_disabled;
+
+static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
+static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
+
+/*
+ * This is a list of everyone who has opened /dev/apm_bios
+ */
+static spinlock_t user_list_lock = SPIN_LOCK_UNLOCKED;
+static LIST_HEAD(apm_user_list);
+
+/*
+ * The kapmd info.
+ */
+static struct task_struct *kapmd;
+static DECLARE_COMPLETION(kapmd_exit);
+
+static const char driver_version[] = "1.13";	/* no spaces */
+
+/*
+ * This structure gets filled in by the machine specific 'get_power_status'
+ * implementation.  Any fields which are not set default to a safe value.
+ */
+struct apm_power_info {
+	unsigned char	ac_line_status;
+	unsigned char	battery_status;
+	unsigned char	battery_flag;
+	unsigned char	battery_life;
+	int		time;
+	int		units;
+};
+
+/*
+ * Compatibility cruft until the IPAQ people move over to the new
+ * interface.
+ */
+static void __apm_get_power_status(struct apm_power_info *info)
+{
+#if 0 && defined(CONFIG_SA1100_H3600) && defined(CONFIG_TOUCHSCREEN_H3600)
+	extern int h3600_apm_get_power_status(u_char *, u_char *, u_char *,
+					      u_char *, u_short *);
+
+	if (machine_is_h3600()) {
+		int dx;
+		h3600_apm_get_power_status(&info->ac_line_status,
+				&info->battery_status, &info->battery_flag,
+				&info->battery_life, &dx);
+		info->time = dx & 0x7fff;
+		info->units = dx & 0x8000 ? 0 : 1;
+	}
+#endif
+}
+
+/*
+ * This allows machines to provide their own "apm get power status" function.
+ */
+void (*apm_get_power_status)(struct apm_power_info *) = __apm_get_power_status;
+EXPORT_SYMBOL(apm_get_power_status);
+
+static int queue_empty(struct apm_user *as)
+{
+	return as->event_head == as->event_tail;
+}
+
+static apm_event_t get_queued_event(struct apm_user *as)
+{
+	as->event_tail = (as->event_tail + 1) % APM_MAX_EVENTS;
+	return as->events[as->event_tail];
+}
+
+static void queue_event_one_user(struct apm_user *as, apm_event_t event)
+{
+	as->event_head = (as->event_head + 1) % APM_MAX_EVENTS;
+	if (as->event_head == as->event_tail) {
+		static int notified;
+
+		if (notified++ == 0)
+		    printk(KERN_ERR "apm: an event queue overflowed\n");
+		as->event_tail = (as->event_tail + 1) % APM_MAX_EVENTS;
+	}
+	as->events[as->event_head] = event;
+
+	if (!as->suser || !as->writer)
+		return;
+
+	switch (event) {
+	case APM_SYS_SUSPEND:
+	case APM_USER_SUSPEND:
+		as->suspends_pending++;
+		suspends_pending++;
+		break;
+
+	case APM_SYS_STANDBY:
+	case APM_USER_STANDBY:
+		as->standbys_pending++;
+		standbys_pending++;
+		break;
+	}
+}
+
+static void queue_event(apm_event_t event, struct apm_user *sender)
+{
+	struct list_head *l;
+
+	spin_lock(&user_list_lock);
+	list_for_each(l, &apm_user_list) {
+		struct apm_user *as = list_entry(l, struct apm_user, list);
+
+		if (as != sender && as->reader)
+			queue_event_one_user(as, event);
+	}
+	spin_unlock(&user_list_lock);
+	wake_up_interruptible(&apm_waitqueue);
+}
+
+/* defined in pm.c */
+extern int suspend(void);
+
+static int apm_suspend(void)
+{
+	struct list_head *l;
+	int err = suspend();
+
+	/*
+	 * Anyone on the APM queues will think we're still suspended.
+	 * Send a message so everyone knows we're now awake again.
+	 */
+	queue_event(APM_NORMAL_RESUME, NULL);
+
+	/*
+	 * Finally, wake up anyone who is sleeping on the suspend.
+	 */
+	spin_lock(&user_list_lock);
+	list_for_each(l, &apm_user_list) {
+		struct apm_user *as = list_entry(l, struct apm_user, list);
+
+		as->suspend_result = err;
+		as->suspend_wait = 0;
+	}
+	spin_unlock(&user_list_lock);
+
+	wake_up_interruptible(&apm_suspend_waitqueue);
+	return err;
+}
+
+static ssize_t apm_read(struct file *fp, char *buf, size_t count, loff_t *ppos)
+{
+	struct apm_user *as = fp->private_data;
+	apm_event_t event;
+	int i = count, ret = 0, nonblock = fp->f_flags & O_NONBLOCK;
+
+	if (count < sizeof(apm_event_t))
+		return -EINVAL;
+
+	if (queue_empty(as) && nonblock)
+		return -EAGAIN;
+
+	wait_event_interruptible(apm_waitqueue, !queue_empty(as));
+
+	while ((i >= sizeof(event)) && !queue_empty(as)) {
+		event = get_queued_event(as);
+		printk("  apm_read: event=%d\n", event);
+
+		ret = -EFAULT;
+		if (copy_to_user(buf, &event, sizeof(event)))
+			break;
+
+		switch (event) {
+		case APM_SYS_SUSPEND:
+		case APM_USER_SUSPEND:
+			as->suspends_read++;
+			break;
+
+		case APM_SYS_STANDBY:
+		case APM_USER_STANDBY:
+			as->standbys_read++;
+			break;
+		}
+
+		buf += sizeof(event);
+		i -= sizeof(event);
+	}
+
+	if (i < count)
+		ret = count - i;
+
+	return ret;
+}
+
+static unsigned int apm_poll(struct file *fp, poll_table * wait)
+{
+	struct apm_user * as = fp->private_data;
+
+	poll_wait(fp, &apm_waitqueue, wait);
+	return queue_empty(as) ? 0 : POLLIN | POLLRDNORM;
+}
+
+/*
+ * apm_ioctl - handle APM ioctl
+ *
+ * APM_IOC_SUSPEND
+ *   This IOCTL is overloaded, and performs two functions.  It is used to:
+ *     - initiate a suspend
+ *     - acknowledge a suspend read from /dev/apm_bios.
+ *   Only when everyone who has opened /dev/apm_bios with write permission
+ *   has acknowledge does the actual suspend happen.
+ */
+static int
+apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
+{
+	struct apm_user *as = filp->private_data;
+	int err = -EINVAL;
+
+	if (!as->suser || !as->writer)
+		return -EPERM;
+
+	switch (cmd) {
+	case APM_IOC_STANDBY:
+		break;
+
+	case APM_IOC_SUSPEND:
+		/*
+		 * If we read a suspend command from /dev/apm_bios,
+		 * then the corresponding APM_IOC_SUSPEND ioctl is
+		 * interpreted as an acknowledge.
+		 */
+		if (as->suspends_read > 0) {
+			as->suspends_read--;
+			as->suspends_pending--;
+			suspends_pending--;
+		} else {
+			queue_event(APM_USER_SUSPEND, as);
+		}
+
+		/*
+		 * If there are outstanding suspend requests for other
+		 * people on /dev/apm_bios, we must sleep for them.
+		 * Last one to bed turns the lights out.
+		 */
+		if (suspends_pending > 0) {
+			as->suspend_wait = 1;
+			err = wait_event_interruptible(apm_suspend_waitqueue,
+						 as->suspend_wait == 0);
+			if (err == 0)
+				err = as->suspend_result;
+		} else {			
+			err = apm_suspend();
+		}
+		break;
+	}
+
+	return err;
+}
+
+static int apm_release(struct inode * inode, struct file * filp)
+{
+	struct apm_user *as = filp->private_data;
+	filp->private_data = NULL;
+
+	spin_lock(&user_list_lock);
+	list_del(&as->list);
+	spin_unlock(&user_list_lock);
+
+	/*
+	 * We are now unhooked from the chain.  As far as new
+	 * events are concerned, we no longer exist.  However, we
+	 * need to balance standbys_pending and suspends_pending,
+	 * which means the possibility of sleeping.
+	 */
+	if (as->standbys_pending > 0) {
+		standbys_pending -= as->standbys_pending;
+//		if (standbys_pending <= 0)
+//			standby();
+	}
+	if (as->suspends_pending > 0) {
+		suspends_pending -= as->suspends_pending;
+		if (suspends_pending <= 0)
+			apm_suspend();
+	}
+
+	kfree(as);
+	return 0;
+}
+
+static int apm_open(struct inode * inode, struct file * filp)
+{
+	struct apm_user *as;
+
+	as = (struct apm_user *)kmalloc(sizeof(*as), GFP_KERNEL);
+	if (as) {
+		memset(as, 0, sizeof(*as));
+
+		/*
+		 * XXX - this is a tiny bit broken, when we consider BSD
+		 * process accounting. If the device is opened by root, we
+		 * instantly flag that we used superuser privs. Who knows,
+		 * we might close the device immediately without doing a
+		 * privileged operation -- cevans
+		 */
+		as->suser = capable(CAP_SYS_ADMIN);
+		as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
+		as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
+
+		spin_lock(&user_list_lock);
+		list_add(&as->list, &apm_user_list);
+		spin_unlock(&user_list_lock);
+
+		filp->private_data = as;
+	}
+
+	return as ? 0 : -ENOMEM;
+}
+
+static struct file_operations apm_bios_fops = {
+	owner:		THIS_MODULE,
+	read:		apm_read,
+	poll:		apm_poll,
+	ioctl:		apm_ioctl,
+	open:		apm_open,
+	release:	apm_release,
+};
+
+static struct miscdevice apm_device = {
+	minor:		APM_MINOR_DEV,
+	name:		"apm_bios",
+	fops:		&apm_bios_fops
+};
+
+
+#ifdef CONFIG_PROC_FS
+/*
+ * Arguments, with symbols from linux/apm_bios.h.
+ *
+ *   0) Linux driver version (this will change if format changes)
+ *   1) APM BIOS Version.  Usually 1.0, 1.1 or 1.2.
+ *   2) APM flags from APM Installation Check (0x00):
+ *	bit 0: APM_16_BIT_SUPPORT
+ *	bit 1: APM_32_BIT_SUPPORT
+ *	bit 2: APM_IDLE_SLOWS_CLOCK
+ *	bit 3: APM_BIOS_DISABLED
+ *	bit 4: APM_BIOS_DISENGAGED
+ *   3) AC line status
+ *	0x00: Off-line
+ *	0x01: On-line
+ *	0x02: On backup power (BIOS >= 1.1 only)
+ *	0xff: Unknown
+ *   4) Battery status
+ *	0x00: High
+ *	0x01: Low
+ *	0x02: Critical
+ *	0x03: Charging
+ *	0x04: Selected battery not present (BIOS >= 1.2 only)
+ *	0xff: Unknown
+ *   5) Battery flag
+ *	bit 0: High
+ *	bit 1: Low
+ *	bit 2: Critical
+ *	bit 3: Charging
+ *	bit 7: No system battery
+ *	0xff: Unknown
+ *   6) Remaining battery life (percentage of charge):
+ *	0-100: valid
+ *	-1: Unknown
+ *   7) Remaining battery life (time units):
+ *	Number of remaining minutes or seconds
+ *	-1: Unknown
+ *   8) min = minutes; sec = seconds
+ */
+static int apm_get_info(char *buf, char **start, off_t fpos, int length)
+{
+	struct apm_power_info info;
+	char *units;
+	int ret;
+
+	info.ac_line_status = 0xff;
+	info.battery_status = 0xff;
+	info.battery_flag   = 0xff;
+	info.battery_life   = 255;
+	info.time	    = -1;
+	info.units	    = -1;
+
+	if (apm_get_power_status)
+		apm_get_power_status(&info);
+
+	switch (info.units) {
+	default:	units = "?";	break;
+	case 0: 	units = "min";	break;
+	case 1: 	units = "sec";	break;
+	}
+
+	ret = sprintf(buf, "%s 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
+		     driver_version, APM_32_BIT_SUPPORT,
+		     info.ac_line_status, info.battery_status,
+		     info.battery_flag, info.battery_life,
+		     info.time, units);
+
+ 	return ret;
+}
+#endif
+
+#if 0
+static int kapmd(void *startup)
+{
+	struct task_struct *tsk = current;
+
+	daemonize();
+	strcpy(tsk->comm, "kapmd");
+	kapmd = tsk;
+
+	spin_lock_irq(&tsk->sigmask_lock);
+	siginitsetinv(&tsk->blocked, sigmask(SIGQUIT));
+	recalc_sigpending(tsk);
+	spin_unlock_irq(&tsk->sigmask_lock);
+
+	complete((struct completion *)startup);
+
+	do {
+		set_task_state(tsk, TASK_INTERRUPTIBLE);
+		schedule();
+	} while (!signal_pending(tsk));
+
+	complete_and_exit(&kapmd_exit, 0);
+}
+#endif
+
+static int __init apm_init(void)
+{
+//	struct completion startup = COMPLETION_INITIALIZER(startup);
+	int ret;
+
+	if (apm_disabled) {
+		printk(KERN_NOTICE "apm: disabled on user request.\n");
+		return -ENODEV;
+	}
+
+	if (PM_IS_ACTIVE()) {
+		printk(KERN_NOTICE "apm: overridden by ACPI.\n");
+		return -EINVAL;
+	}
+
+//	ret = kernel_thread(kapmd, &startup, CLONE_FS | CLONE_FILES);
+//	if (ret)
+//		return ret;
+//	wait_for_completion(&startup);
+
+	pm_active = 1;
+
+#ifdef CONFIG_PROC_FS
+	create_proc_info_entry("apm", 0, NULL, apm_get_info);
+#endif
+
+	ret = misc_register(&apm_device);
+	if (ret != 0) {
+		pm_active = 0;
+		remove_proc_entry("apm", NULL);
+		send_sig(SIGQUIT, kapmd, 1);
+		wait_for_completion(&kapmd_exit);
+	}
+
+	return ret;
+}
+
+static void __exit apm_exit(void)
+{
+	misc_deregister(&apm_device);
+	remove_proc_entry("apm", NULL);
+	pm_active = 0;
+//	send_sig(SIGQUIT, kapmd, 1);
+//	wait_for_completion(&kapmd_exit);
+}
+
+module_init(apm_init);
+module_exit(apm_exit);
+
+MODULE_AUTHOR("Stephen Rothwell");
+MODULE_DESCRIPTION("Advanced Power Management");
+MODULE_LICENSE("GPL");
+
+EXPORT_NO_SYMBOLS;
+
+#ifndef MODULE
+static int __init apm_setup(char *str)
+{
+	while ((str != NULL) && (*str != '\0')) {
+		if (strncmp(str, "off", 3) == 0)
+			apm_disabled = 1;
+		if (strncmp(str, "on", 2) == 0)
+			apm_disabled = 0;
+		str = strchr(str, ',');
+		if (str != NULL)
+			str += strspn(str, ", \t");
+	}
+	return 1;
+}
+
+__setup("apm=", apm_setup);
+#endif

arch/arm/kernel/pm.c

+/*
+ *  linux/arch/arm/kernel/suspend.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License.
+ *
+ *  This is the common support code for suspending an ARM machine.
+ *  pm_do_suspend() is responsible for actually putting the CPU to
+ *  sleep.
+ */
+#include <linux/config.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/cpufreq.h>
+
+#include <asm/leds.h>
+#include <asm/system.h>
+
+int suspend(void)
+{
+	int ret;
+
+	/*
+	 * Suspend "legacy" devices.
+	 */
+	ret = pm_send_all(PM_SUSPEND, (void *)3);
+	if (ret != 0)
+		goto out;
+
+	/*
+	 * Tell LDM devices we're going to suspend.
+	 */
+	ret = device_suspend(4, SUSPEND_NOTIFY);
+	if (ret != 0)
+		goto resume_legacy;
+
+	/*
+	 * Disable, devices, and save state.
+	 */
+	device_suspend(4, SUSPEND_DISABLE);
+	device_suspend(4, SUSPEND_SAVE_STATE);
+
+	/*
+	 * Tell devices that they're going to be powered off.
+	 */
+	device_suspend(4, SUSPEND_POWER_DOWN);
+
+	local_irq_disable();
+	leds_event(led_stop);
+
+	ret = pm_do_suspend();
+
+	leds_event(led_start);
+	local_irq_enable();
+
+	/*
+	 * Tell devices that they now have power.
+	 */
+	device_resume(RESUME_POWER_ON);
+
+	/*
+	 * Restore the CPU frequency settings.
+	 */
+#ifdef CONFIG_CPU_FREQ
+	cpufreq_restore();
+#endif
+
+	/*
+	 * Resume LDM devices.
+	 */
+	device_resume(RESUME_RESTORE_STATE);
+	device_resume(RESUME_ENABLE);
+
+ resume_legacy:
+	/*
+	 * Resume "legacy" devices.
+	 */
+	pm_send_all(PM_RESUME, (void *)0);
+
+ out:
+	return ret;
+}
+
+#ifdef CONFIG_SYSCTL
+#include <linux/init.h>
+#include <linux/sysctl.h>
+
+/*
+ * This came from arch/arm/mach-sa1100/pm.c:
+ * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com>
+ *  with modifications by Nicolas Pitre and Russell King.
+ *
+ * ARGH!  ACPI people defined CTL_ACPI in linux/acpi.h rather than
+ * linux/sysctl.h.
+ *
+ * This means our interface here won't survive long - it needs a new
+ * interface.  Quick hack to get this working - use sysctl id 9999.
+ */
+#warning ACPI broke the kernel, this interface needs to be fixed up.
+#define CTL_ACPI 9999
+#define ACPI_S1_SLP_TYP 19
+
+static struct ctl_table pm_table[] =
+{
+	{ACPI_S1_SLP_TYP, "suspend", NULL, 0, 0600, NULL, (proc_handler *)&suspend},
+	{0}
+};
+
+static struct ctl_table pm_dir_table[] =
+{
+	{CTL_ACPI, "pm", NULL, 0, 0555, pm_table},
+	{0}
+};
+
+/*
+ * Initialize power interface
+ */
+static int __init pm_init(void)
+{
+	register_sysctl_table(pm_dir_table, 1);
+	return 0;
+}
+
+fs_initcall(pm_init);
+
+#endif

arch/arm/mach-sa1100/pm.c

@@ -22,25 +22,12 @@
  * 2002-05-27:	Nicolas Pitre	Killed sleep.h and the kmalloced save array.
  * 				Storage is local on the stack now.
  */
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/pm.h>
-#include <linux/sysctl.h>
 #include <linux/errno.h>
-#include <linux/device.h>
-#include <linux/cpufreq.h>
+#include <linux/time.h>
 
 #include <asm/hardware.h>
 #include <asm/memory.h>
 #include <asm/system.h>
-#include <asm/leds.h>
-
-
-/*
- * Debug macros
- */
-#undef DEBUG
 
 extern void sa1100_cpu_suspend(void);
 extern void sa1100_cpu_resume(void);
@@ -72,10 +59,6 @@ int pm_do_suspend(void)
 {
 	unsigned long sleep_save[SLEEP_SAVE_SIZE];
 
-	local_irq_disable();
-
-	leds_event(led_stop);
-
 	/* preserve current time */
 	RCNR = xtime.tv_sec;
 
@@ -154,17 +137,6 @@ int pm_do_suspend(void)
 	/* restore current time */
 	xtime.tv_sec = RCNR;
 
-	leds_event(led_start);
-
-	local_irq_enable();
-
-	/*
-	 * Restore the CPU frequency settings.
-	 */
-#ifdef CONFIG_CPU_FREQ
-	cpufreq_restore();
-#endif
-
 	return 0;
 }
 
@@ -172,78 +144,3 @@ unsigned long sleep_phys_sp(void *sp)
 {
 	return virt_to_phys(sp);
 }
-
-#ifdef CONFIG_SYSCTL
-/*
- * ARGH!  ACPI people defined CTL_ACPI in linux/acpi.h rather than
- * linux/sysctl.h.
- *
- * This means our interface here won't survive long - it needs a new
- * interface.  Quick hack to get this working - use sysctl id 9999.
- */
-#warning ACPI broke the kernel, this interface needs to be fixed up.
-#define CTL_ACPI 9999
-#define ACPI_S1_SLP_TYP 19
-
-/*
- * Send us to sleep.
- */
-static int sysctl_pm_do_suspend(void)
-{
-	int retval;
-
-	/*
-	 * Suspend "legacy" devices.
-	 */
-	retval = pm_send_all(PM_SUSPEND, (void *)3);
-	if (retval == 0) {
-		/*
-		 * Suspend LDM devices.
-		 */
-		device_suspend(4, SUSPEND_NOTIFY);
-		device_suspend(4, SUSPEND_SAVE_STATE);
-		device_suspend(4, SUSPEND_DISABLE);
-
-		retval = pm_do_suspend();
-
-		/*
-		 * Resume LDM devices.
-		 */
-		device_resume(RESUME_RESTORE_STATE);
-		device_resume(RESUME_ENABLE);
-
-		/*
-		 * Resume "legacy" devices.
-		 */
-		pm_send_all(PM_RESUME, (void *)0);
-	}
-
-	return retval;
-}
-
-static struct ctl_table pm_table[] =
-{
-	{ACPI_S1_SLP_TYP, "suspend", NULL, 0, 0600, NULL, (proc_handler *)&sysctl_pm_do_suspend},
-	{0}
-};
-
-static struct ctl_table pm_dir_table[] =
-{
-	{CTL_ACPI, "pm", NULL, 0, 0555, pm_table},
-	{0}
-};
-
-/*
- * Initialize power interface
- */
-static int __init pm_init(void)
-{
-	register_sysctl_table(pm_dir_table, 1);
-	return 0;
-}
-
-fs_initcall(pm_init);
-
-#endif
-
-EXPORT_SYMBOL(pm_do_suspend);