i7300_idle: Remove this driver

In preparation for removing the idle_notifier, remove its only user, the
i7300_idle driver.

i7300_idle was deployed in 2008 to reduce idle memory power on systems
using the i7300 chipset.  The driver worked by throttling the
fully-buffered DIMMs during idle periods using the IOAT DMA engine.

The driver ran only on the i7300 chip-set, and no other hardware has used
this mechanism.  The driver no longer has a maintainer.

Removing this driver will increase idle power on i7300 systems when they
run the new kernel without the driver.

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ad6a044e57cc75f44cc8621abe846e58f7882243.1479449716.git.len.brown@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 0 insertions, 630 deletions

diff --git a/drivers/idle/Kconfig b/drivers/idle/Kconfig
index 4732dfc15447..55bcf803841e 100644
--- a/drivers/idle/Kconfig
+++ b/drivers/idle/Kconfig
@@ -8,20 +8,3 @@ config INTEL_IDLE
           native Intel hardware idle features.  The acpi_idle driver
           can be configured at the same time, in order to handle
           processors intel_idle does not support.
-
-menu "Memory power savings"
-depends on X86_64
-
-config I7300_IDLE_IOAT_CHANNEL
-        bool
-
-config I7300_IDLE
-        tristate "Intel chipset idle memory power saving driver"
-        select I7300_IDLE_IOAT_CHANNEL
-        help
-          Enable memory power savings when idle with certain Intel server
-          chipsets. The chipset must have I/O AT support, such as the
-          Intel 7300. The power savings depends on the type and quantity of
-          DRAM devices.
-
-endmenu
diff --git a/drivers/idle/Makefile b/drivers/idle/Makefile
index 23d295cf10f2..0007111d73e9 100644
--- a/drivers/idle/Makefile
+++ b/drivers/idle/Makefile
@@ -1,3 +1,2 @@
-obj-$(CONFIG_I7300_IDLE)                        += i7300_idle.o
 obj-$(CONFIG_INTEL_IDLE)                        += intel_idle.o
 
diff --git a/drivers/idle/i7300_idle.c b/drivers/idle/i7300_idle.c
deleted file mode 100644
index ffeebc7e9f1c..000000000000
--- a/drivers/idle/i7300_idle.c
+++ /dev/null
@@ -1,612 +0,0 @@
-/*
- * (C) Copyright 2008 Intel Corporation
- * Authors:
- * Andy Henroid <andrew.d.henroid@intel.com>
- * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
- */
-
-/*
- * Save DIMM power on Intel 7300-based platforms when all CPUs/cores
- * are idle, using the DIMM thermal throttling capability.
- *
- * This driver depends on the Intel integrated DMA controller (I/O AT).
- * If the driver for I/O AT (drivers/dma/ioatdma*) is also enabled,
- * this driver should work cooperatively.
- */
-
-/* #define DEBUG */
-
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/gfp.h>
-#include <linux/sched.h>
-#include <linux/notifier.h>
-#include <linux/cpumask.h>
-#include <linux/ktime.h>
-#include <linux/delay.h>
-#include <linux/debugfs.h>
-#include <linux/stop_machine.h>
-#include <linux/i7300_idle.h>
-
-#include <asm/idle.h>
-
-#include "../dma/ioat/hw.h"
-#include "../dma/ioat/registers.h"
-
-#define I7300_IDLE_DRIVER_VERSION       "1.55"
-#define I7300_PRINT                     "i7300_idle:"
-
-#define MAX_STOP_RETRIES        10
-
-static int debug;
-module_param_named(debug, debug, uint, 0644);
-MODULE_PARM_DESC(debug, "Enable debug printks in this driver");
-
-static int forceload;
-module_param_named(forceload, forceload, uint, 0644);
-MODULE_PARM_DESC(debug, "Enable driver testing on unvalidated i5000");
-
-#define dprintk(fmt, arg...) \
-        do { if (debug) printk(KERN_INFO I7300_PRINT fmt, ##arg); } while (0)
-
-/*
- * Value to set THRTLOW to when initiating throttling
- *  0 = No throttling
- *  1 = Throttle when > 4 activations per eval window (Maximum throttling)
- *  2 = Throttle when > 8 activations
- *  168 = Throttle when > 672 activations (Minimum throttling)
- */
-#define MAX_THROTTLE_LOW_LIMIT          168
-static uint throttle_low_limit = 1;
-module_param_named(throttle_low_limit, throttle_low_limit, uint, 0644);
-MODULE_PARM_DESC(throttle_low_limit,
-                "Value for THRTLOWLM activation field "
-                "(0 = disable throttle, 1 = Max throttle, 168 = Min throttle)");
-
-/*
- * simple invocation and duration statistics
- */
-static unsigned long total_starts;
-static unsigned long total_us;
-
-#ifdef DEBUG
-static unsigned long past_skip;
-#endif
-
-static struct pci_dev *fbd_dev;
-
-static raw_spinlock_t i7300_idle_lock;
-static int i7300_idle_active;
-
-static u8 i7300_idle_thrtctl_saved;
-static u8 i7300_idle_thrtlow_saved;
-static u32 i7300_idle_mc_saved;
-
-static cpumask_var_t idle_cpumask;
-static ktime_t start_ktime;
-static unsigned long avg_idle_us;
-
-static struct dentry *debugfs_dir;
-
-/* Begin: I/O AT Helper routines */
-
-#define IOAT_CHANBASE(ioat_ctl, chan) (ioat_ctl + 0x80 + 0x80 * chan)
-/* Snoop control (disable snoops when coherency is not important) */
-#define IOAT_DESC_SADDR_SNP_CTL (1UL << 1)
-#define IOAT_DESC_DADDR_SNP_CTL (1UL << 2)
-
-static struct pci_dev *ioat_dev;
-static struct ioat_dma_descriptor *ioat_desc; /* I/O AT desc & data (1 page) */
-static unsigned long ioat_desc_phys;
-static u8 *ioat_iomap; /* I/O AT memory-mapped control regs (aka CB_BAR) */
-static u8 *ioat_chanbase;
-
-/* Start I/O AT memory copy */
-static int i7300_idle_ioat_start(void)
-{
-        u32 err;
-        /* Clear error (due to circular descriptor pointer) */
-        err = readl(ioat_chanbase + IOAT_CHANERR_OFFSET);
-        if (err)
-                writel(err, ioat_chanbase + IOAT_CHANERR_OFFSET);
-
-        writeb(IOAT_CHANCMD_START, ioat_chanbase + IOAT1_CHANCMD_OFFSET);
-        return 0;
-}
-
-/* Stop I/O AT memory copy */
-static void i7300_idle_ioat_stop(void)
-{
-        int i;
-        u64 sts;
-
-        for (i = 0; i < MAX_STOP_RETRIES; i++) {
-                writeb(IOAT_CHANCMD_RESET,
-                        ioat_chanbase + IOAT1_CHANCMD_OFFSET);
-
-                udelay(10);
-
-                sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
-                        IOAT_CHANSTS_STATUS;
-
-                if (sts != IOAT_CHANSTS_ACTIVE)
-                        break;
-
-        }
-
-        if (i == MAX_STOP_RETRIES) {
-                dprintk("failed to stop I/O AT after %d retries\n",
-                        MAX_STOP_RETRIES);
-        }
-}
-
-/* Test I/O AT by copying 1024 byte from 2k to 1k */
-static int __init i7300_idle_ioat_selftest(u8 *ctl,
-                struct ioat_dma_descriptor *desc, unsigned long desc_phys)
-{
-        u64 chan_sts;
-
-        memset(desc, 0, 2048);
-        memset((u8 *) desc + 2048, 0xab, 1024);
-
-        desc[0].size = 1024;
-        desc[0].ctl = 0;
-        desc[0].src_addr = desc_phys + 2048;
-        desc[0].dst_addr = desc_phys + 1024;
-        desc[0].next = 0;
-
-        writeb(IOAT_CHANCMD_RESET, ioat_chanbase + IOAT1_CHANCMD_OFFSET);
-        writeb(IOAT_CHANCMD_START, ioat_chanbase + IOAT1_CHANCMD_OFFSET);
-
-        udelay(1000);
-
-        chan_sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
-                        IOAT_CHANSTS_STATUS;
-
-        if (chan_sts != IOAT_CHANSTS_DONE) {
-                /* Not complete, reset the channel */
-                writeb(IOAT_CHANCMD_RESET,
-                       ioat_chanbase + IOAT1_CHANCMD_OFFSET);
-                return -1;
-        }
-
-        if (*(u32 *) ((u8 *) desc + 3068) != 0xabababab ||
-            *(u32 *) ((u8 *) desc + 2044) != 0xabababab) {
-                dprintk("Data values src 0x%x, dest 0x%x, memset 0x%x\n",
-                        *(u32 *) ((u8 *) desc + 2048),
-                        *(u32 *) ((u8 *) desc + 1024),
-                        *(u32 *) ((u8 *) desc + 3072));
-                return -1;
-        }
-        return 0;
-}
-
-static struct device dummy_dma_dev = {
-        .init_name = "fallback device",
-        .coherent_dma_mask = DMA_BIT_MASK(64),
-        .dma_mask = &dummy_dma_dev.coherent_dma_mask,
-};
-
-/* Setup and initialize I/O AT */
-/* This driver needs I/O AT as the throttling takes effect only when there is
- * some memory activity. We use I/O AT to set up a dummy copy, while all CPUs
- * go idle and memory is throttled.
- */
-static int __init i7300_idle_ioat_init(void)
-{
-        u8 ver, chan_count, ioat_chan;
-        u16 chan_ctl;
-
-        ioat_iomap = (u8 *) ioremap_nocache(pci_resource_start(ioat_dev, 0),
-                                            pci_resource_len(ioat_dev, 0));
-
-        if (!ioat_iomap) {
-                printk(KERN_ERR I7300_PRINT "failed to map I/O AT registers\n");
-                goto err_ret;
-        }
-
-        ver = readb(ioat_iomap + IOAT_VER_OFFSET);
-        if (ver != IOAT_VER_1_2) {
-                printk(KERN_ERR I7300_PRINT "unknown I/O AT version (%u.%u)\n",
-                        ver >> 4, ver & 0xf);
-                goto err_unmap;
-        }
-
-        chan_count = readb(ioat_iomap + IOAT_CHANCNT_OFFSET);
-        if (!chan_count) {
-                printk(KERN_ERR I7300_PRINT "unexpected # of I/O AT channels "
-                        "(%u)\n",
-                        chan_count);
-                goto err_unmap;
-        }
-
-        ioat_chan = chan_count - 1;
-        ioat_chanbase = IOAT_CHANBASE(ioat_iomap, ioat_chan);
-
-        chan_ctl = readw(ioat_chanbase + IOAT_CHANCTRL_OFFSET);
-        if (chan_ctl & IOAT_CHANCTRL_CHANNEL_IN_USE) {
-                printk(KERN_ERR I7300_PRINT "channel %d in use\n", ioat_chan);
-                goto err_unmap;
-        }
-
-        writew(IOAT_CHANCTRL_CHANNEL_IN_USE,
-                ioat_chanbase + IOAT_CHANCTRL_OFFSET);
-
-        ioat_desc = (struct ioat_dma_descriptor *)dma_alloc_coherent(
-                        &dummy_dma_dev, 4096,
-                        (dma_addr_t *)&ioat_desc_phys, GFP_KERNEL);
-        if (!ioat_desc) {
-                printk(KERN_ERR I7300_PRINT "failed to allocate I/O AT desc\n");
-                goto err_mark_unused;
-        }
-
-        writel(ioat_desc_phys & 0xffffffffUL,
-               ioat_chanbase + IOAT1_CHAINADDR_OFFSET_LOW);
-        writel(ioat_desc_phys >> 32,
-               ioat_chanbase + IOAT1_CHAINADDR_OFFSET_HIGH);
-
-        if (i7300_idle_ioat_selftest(ioat_iomap, ioat_desc, ioat_desc_phys)) {
-                printk(KERN_ERR I7300_PRINT "I/O AT self-test failed\n");
-                goto err_free;
-        }
-
-        /* Setup circular I/O AT descriptor chain */
-        ioat_desc[0].ctl = IOAT_DESC_SADDR_SNP_CTL | IOAT_DESC_DADDR_SNP_CTL;
-        ioat_desc[0].src_addr = ioat_desc_phys + 2048;
-        ioat_desc[0].dst_addr = ioat_desc_phys + 3072;
-        ioat_desc[0].size = 128;
-        ioat_desc[0].next = ioat_desc_phys + sizeof(struct ioat_dma_descriptor);
-
-        ioat_desc[1].ctl = ioat_desc[0].ctl;
-        ioat_desc[1].src_addr = ioat_desc[0].src_addr;
-        ioat_desc[1].dst_addr = ioat_desc[0].dst_addr;
-        ioat_desc[1].size = ioat_desc[0].size;
-        ioat_desc[1].next = ioat_desc_phys;
-
-        return 0;
-
-err_free:
-        dma_free_coherent(&dummy_dma_dev, 4096, (void *)ioat_desc, 0);
-err_mark_unused:
-        writew(0, ioat_chanbase + IOAT_CHANCTRL_OFFSET);
-err_unmap:
-        iounmap(ioat_iomap);
-err_ret:
-        return -ENODEV;
-}
-
-/* Cleanup I/O AT */
-static void __exit i7300_idle_ioat_exit(void)
-{
-        int i;
-        u64 chan_sts;
-
-        i7300_idle_ioat_stop();
-
-        /* Wait for a while for the channel to halt before releasing */
-        for (i = 0; i < MAX_STOP_RETRIES; i++) {
-                writeb(IOAT_CHANCMD_RESET,
-                       ioat_chanbase + IOAT1_CHANCMD_OFFSET);
-
-                chan_sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
-                        IOAT_CHANSTS_STATUS;
-
-                if (chan_sts != IOAT_CHANSTS_ACTIVE) {
-                        writew(0, ioat_chanbase + IOAT_CHANCTRL_OFFSET);
-                        break;
-                }
-                udelay(1000);
-        }
-
-        chan_sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
-                        IOAT_CHANSTS_STATUS;
-
-        /*
-         * We tried to reset multiple times. If IO A/T channel is still active
-         * flag an error and return without cleanup. Memory leak is better
-         * than random corruption in that extreme error situation.
-         */
-        if (chan_sts == IOAT_CHANSTS_ACTIVE) {
-                printk(KERN_ERR I7300_PRINT "Unable to stop IO A/T channels."
-                        " Not freeing resources\n");
-                return;
-        }
-
-        dma_free_coherent(&dummy_dma_dev, 4096, (void *)ioat_desc, 0);
-        iounmap(ioat_iomap);
-}
-
-/* End: I/O AT Helper routines */
-
-#define DIMM_THRTLOW 0x64
-#define DIMM_THRTCTL 0x67
-#define DIMM_THRTCTL_THRMHUNT (1UL << 0)
-#define DIMM_MC 0x40
-#define DIMM_GTW_MODE (1UL << 17)
-#define DIMM_GBLACT 0x60
-
-/*
- * Keep track of an exponential-decaying average of recent idle durations.
- * The latest duration gets DURATION_WEIGHT_PCT percentage weight
- * in this average, with the old average getting the remaining weight.
- *
- * High weights emphasize recent history, low weights include long history.
- */
-#define DURATION_WEIGHT_PCT 55
-
-/*
- * When the decaying average of recent durations or the predicted duration
- * of the next timer interrupt is shorter than duration_threshold, the
- * driver will decline to throttle.
- */
-#define DURATION_THRESHOLD_US 100
-
-
-/* Store DIMM thermal throttle configuration */
-static int i7300_idle_thrt_save(void)
-{
-        u32 new_mc_val;
-        u8 gblactlm;
-
-        pci_read_config_byte(fbd_dev, DIMM_THRTCTL, &i7300_idle_thrtctl_saved);
-        pci_read_config_byte(fbd_dev, DIMM_THRTLOW, &i7300_idle_thrtlow_saved);
-        pci_read_config_dword(fbd_dev, DIMM_MC, &i7300_idle_mc_saved);
-        /*
-         * Make sure we have Global Throttling Window Mode set to have a
-         * "short" window. This (mostly) works around an issue where
-         * throttling persists until the end of the global throttling window
-         * size. On the tested system, this was resulting in a maximum of
-         * 64 ms to exit throttling (average 32 ms). The actual numbers
-         * depends on system frequencies. Setting the short window reduces
-         * this by a factor of 4096.
-         *
-         * We will only do this only if the system is set for
-         * unlimited-activations while in open-loop throttling (i.e., when
-         * Global Activation Throttle Limit is zero).
-         */
-        pci_read_config_byte(fbd_dev, DIMM_GBLACT, &gblactlm);
-        dprintk("thrtctl_saved = 0x%02x, thrtlow_saved = 0x%02x\n",
-                i7300_idle_thrtctl_saved,
-                i7300_idle_thrtlow_saved);
-        dprintk("mc_saved = 0x%08x, gblactlm = 0x%02x\n",
-                i7300_idle_mc_saved,
-                gblactlm);
-        if (gblactlm == 0) {
-                new_mc_val = i7300_idle_mc_saved | DIMM_GTW_MODE;
-                pci_write_config_dword(fbd_dev, DIMM_MC, new_mc_val);
-                return 0;
-        } else {
-                dprintk("could not set GTW_MODE = 1 (OLTT enabled)\n");
-                return -ENODEV;
-        }
-}
-
-/* Restore DIMM thermal throttle configuration */
-static void i7300_idle_thrt_restore(void)
-{
-        pci_write_config_dword(fbd_dev, DIMM_MC, i7300_idle_mc_saved);
-        pci_write_config_byte(fbd_dev, DIMM_THRTLOW, i7300_idle_thrtlow_saved);
-        pci_write_config_byte(fbd_dev, DIMM_THRTCTL, i7300_idle_thrtctl_saved);
-}
-
-/* Enable DIMM thermal throttling */
-static void i7300_idle_start(void)
-{
-        u8 new_ctl;
-        u8 limit;
-
-        new_ctl = i7300_idle_thrtctl_saved & ~DIMM_THRTCTL_THRMHUNT;
-        pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
-
-        limit = throttle_low_limit;
-        if (unlikely(limit > MAX_THROTTLE_LOW_LIMIT))
-                limit = MAX_THROTTLE_LOW_LIMIT;
-
-        pci_write_config_byte(fbd_dev, DIMM_THRTLOW, limit);
-
-        new_ctl = i7300_idle_thrtctl_saved | DIMM_THRTCTL_THRMHUNT;
-        pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
-}
-
-/* Disable DIMM thermal throttling */
-static void i7300_idle_stop(void)
-{
-        u8 new_ctl;
-        u8 got_ctl;
-
-        new_ctl = i7300_idle_thrtctl_saved & ~DIMM_THRTCTL_THRMHUNT;
-        pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
-
-        pci_write_config_byte(fbd_dev, DIMM_THRTLOW, i7300_idle_thrtlow_saved);
-        pci_write_config_byte(fbd_dev, DIMM_THRTCTL, i7300_idle_thrtctl_saved);
-        pci_read_config_byte(fbd_dev, DIMM_THRTCTL, &got_ctl);
-        WARN_ON_ONCE(got_ctl != i7300_idle_thrtctl_saved);
-}
-
-
-/*
- * i7300_avg_duration_check()
- * return 0 if the decaying average of recent idle durations is
- * more than DURATION_THRESHOLD_US
- */
-static int i7300_avg_duration_check(void)
-{
-        if (avg_idle_us >= DURATION_THRESHOLD_US)
-                return 0;
-
-#ifdef DEBUG
-        past_skip++;
-#endif
-        return 1;
-}
-
-/* Idle notifier to look at idle CPUs */
-static int i7300_idle_notifier(struct notifier_block *nb, unsigned long val,
-                                void *data)
-{
-        unsigned long flags;
-        ktime_t now_ktime;
-        static ktime_t idle_begin_time;
-        static int time_init = 1;
-
-        if (!throttle_low_limit)
-                return 0;
-
-        if (unlikely(time_init)) {
-                time_init = 0;
-                idle_begin_time = ktime_get();
-        }
-
-        raw_spin_lock_irqsave(&i7300_idle_lock, flags);
-        if (val == IDLE_START) {
-
-                cpumask_set_cpu(smp_processor_id(), idle_cpumask);
-
-                if (cpumask_weight(idle_cpumask) != num_online_cpus())
-                        goto end;
-
-                now_ktime = ktime_get();
-                idle_begin_time = now_ktime;
-
-                if (i7300_avg_duration_check())
-                        goto end;
-
-                i7300_idle_active = 1;
-                total_starts++;
-                start_ktime = now_ktime;
-
-                i7300_idle_start();
-                i7300_idle_ioat_start();
-
-        } else if (val == IDLE_END) {
-                cpumask_clear_cpu(smp_processor_id(), idle_cpumask);
-                if (cpumask_weight(idle_cpumask) == (num_online_cpus() - 1)) {
-                        /* First CPU coming out of idle */
-                        u64 idle_duration_us;
-
-                        now_ktime = ktime_get();
-
-                        idle_duration_us = ktime_to_us(ktime_sub
-                                                (now_ktime, idle_begin_time));
-
-                        avg_idle_us =
-                                ((100 - DURATION_WEIGHT_PCT) * avg_idle_us +
-                                 DURATION_WEIGHT_PCT * idle_duration_us) / 100;
-
-                        if (i7300_idle_active) {
-                                ktime_t idle_ktime;
-
-                                idle_ktime = ktime_sub(now_ktime, start_ktime);
-                                total_us += ktime_to_us(idle_ktime);
-
-                                i7300_idle_ioat_stop();
-                                i7300_idle_stop();
-                                i7300_idle_active = 0;
-                        }
-                }
-        }
-end:
-        raw_spin_unlock_irqrestore(&i7300_idle_lock, flags);
-        return 0;
-}
-
-static struct notifier_block i7300_idle_nb = {
-        .notifier_call = i7300_idle_notifier,
-};
-
-MODULE_DEVICE_TABLE(pci, pci_tbl);
-
-static ssize_t stats_read_ul(struct file *fp, char __user *ubuf, size_t count,
-                                loff_t *off)
-{
-        unsigned long *p = fp->private_data;
-        char buf[32];
-        int len;
-
-        len = snprintf(buf, 32, "%lu\n", *p);
-        return simple_read_from_buffer(ubuf, count, off, buf, len);
-}
-
-static const struct file_operations idle_fops = {
-        .open   = simple_open,
-        .read   = stats_read_ul,
-        .llseek = default_llseek,
-};
-
-struct debugfs_file_info {
-        void *ptr;
-        char name[32];
-        struct dentry *file;
-} debugfs_file_list[] = {
-                                {&total_starts, "total_starts", NULL},
-                                {&total_us, "total_us", NULL},
-#ifdef DEBUG
-                                {&past_skip, "past_skip", NULL},
-#endif
-                                {NULL, "", NULL}
-                        };
-
-static int __init i7300_idle_init(void)
-{
-        raw_spin_lock_init(&i7300_idle_lock);
-        total_us = 0;
-
-        if (i7300_idle_platform_probe(&fbd_dev, &ioat_dev, forceload))
-                return -ENODEV;
-
-        if (i7300_idle_thrt_save())
-                return -ENODEV;
-
-        if (i7300_idle_ioat_init())
-                return -ENODEV;
-
-        if (!zalloc_cpumask_var(&idle_cpumask, GFP_KERNEL))
-                return -ENOMEM;
-
-        debugfs_dir = debugfs_create_dir("i7300_idle", NULL);
-        if (debugfs_dir) {
-                int i = 0;
-
-                while (debugfs_file_list[i].ptr != NULL) {
-                        debugfs_file_list[i].file = debugfs_create_file(
-                                        debugfs_file_list[i].name,
-                                        S_IRUSR,
-                                        debugfs_dir,
-                                        debugfs_file_list[i].ptr,
-                                        &idle_fops);
-                        i++;
-                }
-        }
-
-        idle_notifier_register(&i7300_idle_nb);
-
-        printk(KERN_INFO "i7300_idle: loaded v%s\n", I7300_IDLE_DRIVER_VERSION);
-        return 0;
-}
-
-static void __exit i7300_idle_exit(void)
-{
-        idle_notifier_unregister(&i7300_idle_nb);
-        free_cpumask_var(idle_cpumask);
-
-        if (debugfs_dir) {
-                int i = 0;
-
-                while (debugfs_file_list[i].file != NULL) {
-                        debugfs_remove(debugfs_file_list[i].file);
-                        i++;
-                }
-
-                debugfs_remove(debugfs_dir);
-        }
-        i7300_idle_thrt_restore();
-        i7300_idle_ioat_exit();
-}
-
-module_init(i7300_idle_init);
-module_exit(i7300_idle_exit);
-
-MODULE_AUTHOR("Andy Henroid <andrew.d.henroid@intel.com>");
-MODULE_DESCRIPTION("Intel Chipset DIMM Idle Power Saving Driver v"
-                        I7300_IDLE_DRIVER_VERSION);
-MODULE_LICENSE("GPL");