Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 770 insertions, 0 deletions

diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
new file mode 100644
index 000000000000..01ae1964c938
--- /dev/null
+++ b/arch/s390/appldata/appldata_base.c
@@ -0,0 +1,770 @@
+/*
+ * arch/s390/appldata/appldata_base.c
+ *
+ * Base infrastructure for Linux-z/VM Monitor Stream, Stage 1.
+ * Exports appldata_register_ops() and appldata_unregister_ops() for the
+ * data gathering modules.
+ *
+ * Copyright (C) 2003 IBM Corporation, IBM Deutschland Entwicklung GmbH.
+ *
+ * Author: Gerald Schaefer <geraldsc@de.ibm.com>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/page-flags.h>
+#include <linux/swap.h>
+#include <linux/pagemap.h>
+#include <linux/sysctl.h>
+#include <asm/timer.h>
+//#include <linux/kernel_stat.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+
+#include "appldata.h"
+
+
+#define MY_PRINT_NAME   "appldata"              /* for debug messages, etc. */
+#define APPLDATA_CPU_INTERVAL   10000           /* default (CPU) time for
+                                                   sampling interval in
+                                                   milliseconds */
+
+#define TOD_MICRO       0x01000                 /* nr. of TOD clock units
+                                                   for 1 microsecond */
+#ifndef CONFIG_ARCH_S390X
+
+#define APPLDATA_START_INTERVAL_REC 0x00        /* Function codes for */
+#define APPLDATA_STOP_REC           0x01        /* DIAG 0xDC      */
+#define APPLDATA_GEN_EVENT_RECORD   0x02
+#define APPLDATA_START_CONFIG_REC   0x03
+
+#else
+
+#define APPLDATA_START_INTERVAL_REC 0x80
+#define APPLDATA_STOP_REC           0x81
+#define APPLDATA_GEN_EVENT_RECORD   0x82
+#define APPLDATA_START_CONFIG_REC   0x83
+
+#endif /* CONFIG_ARCH_S390X */
+
+
+/*
+ * Parameter list for DIAGNOSE X'DC'
+ */
+#ifndef CONFIG_ARCH_S390X
+struct appldata_parameter_list {
+        u16 diag;               /* The DIAGNOSE code X'00DC'          */
+        u8  function;           /* The function code for the DIAGNOSE */
+        u8  parlist_length;     /* Length of the parameter list       */
+        u32 product_id_addr;    /* Address of the 16-byte product ID  */
+        u16 reserved;
+        u16 buffer_length;      /* Length of the application data buffer  */
+        u32 buffer_addr;        /* Address of the application data buffer */
+};
+#else
+struct appldata_parameter_list {
+        u16 diag;
+        u8  function;
+        u8  parlist_length;
+        u32 unused01;
+        u16 reserved;
+        u16 buffer_length;
+        u32 unused02;
+        u64 product_id_addr;
+        u64 buffer_addr;
+};
+#endif /* CONFIG_ARCH_S390X */
+
+/*
+ * /proc entries (sysctl)
+ */
+static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata";
+static int appldata_timer_handler(ctl_table *ctl, int write, struct file *filp,
+                                  void __user *buffer, size_t *lenp, loff_t *ppos);
+static int appldata_interval_handler(ctl_table *ctl, int write,
+                                         struct file *filp,
+                                         void __user *buffer,
+                                         size_t *lenp, loff_t *ppos);
+
+static struct ctl_table_header *appldata_sysctl_header;
+static struct ctl_table appldata_table[] = {
+        {
+                .ctl_name       = CTL_APPLDATA_TIMER,
+                .procname       = "timer",
+                .mode           = S_IRUGO | S_IWUSR,
+                .proc_handler   = &appldata_timer_handler,
+        },
+        {
+                .ctl_name       = CTL_APPLDATA_INTERVAL,
+                .procname       = "interval",
+                .mode           = S_IRUGO | S_IWUSR,
+                .proc_handler   = &appldata_interval_handler,
+        },
+        { .ctl_name = 0 }
+};
+
+static struct ctl_table appldata_dir_table[] = {
+        {
+                .ctl_name       = CTL_APPLDATA,
+                .procname       = appldata_proc_name,
+                .maxlen         = 0,
+                .mode           = S_IRUGO | S_IXUGO,
+                .child          = appldata_table,
+        },
+        { .ctl_name = 0 }
+};
+
+/*
+ * Timer
+ */
+DEFINE_PER_CPU(struct vtimer_list, appldata_timer);
+static atomic_t appldata_expire_count = ATOMIC_INIT(0);
+
+static DEFINE_SPINLOCK(appldata_timer_lock);
+static int appldata_interval = APPLDATA_CPU_INTERVAL;
+static int appldata_timer_active;
+
+/*
+ * Tasklet
+ */
+static struct tasklet_struct appldata_tasklet_struct;
+
+/*
+ * Ops list
+ */
+static DEFINE_SPINLOCK(appldata_ops_lock);
+static LIST_HEAD(appldata_ops_list);
+
+
+/************************* timer, tasklet, DIAG ******************************/
+/*
+ * appldata_timer_function()
+ *
+ * schedule tasklet and reschedule timer
+ */
+static void appldata_timer_function(unsigned long data, struct pt_regs *regs)
+{
+        P_DEBUG("   -= Timer =-\n");
+        P_DEBUG("CPU: %i, expire_count: %i\n", smp_processor_id(),
+                atomic_read(&appldata_expire_count));
+        if (atomic_dec_and_test(&appldata_expire_count)) {
+                atomic_set(&appldata_expire_count, num_online_cpus());
+                tasklet_schedule((struct tasklet_struct *) data);
+        }
+}
+
+/*
+ * appldata_tasklet_function()
+ *
+ * call data gathering function for each (active) module
+ */
+static void appldata_tasklet_function(unsigned long data)
+{
+        struct list_head *lh;
+        struct appldata_ops *ops;
+        int i;
+
+        P_DEBUG("  -= Tasklet =-\n");
+        i = 0;
+        spin_lock(&appldata_ops_lock);
+        list_for_each(lh, &appldata_ops_list) {
+                ops = list_entry(lh, struct appldata_ops, list);
+                P_DEBUG("list_for_each loop: %i) active = %u, name = %s\n",
+                        ++i, ops->active, ops->name);
+                if (ops->active == 1) {
+                        ops->callback(ops->data);
+                }
+        }
+        spin_unlock(&appldata_ops_lock);
+}
+
+/*
+ * appldata_diag()
+ *
+ * prepare parameter list, issue DIAG 0xDC
+ */
+static int appldata_diag(char record_nr, u16 function, unsigned long buffer,
+                        u16 length)
+{
+        unsigned long ry;
+        struct appldata_product_id {
+                char prod_nr[7];                        /* product nr. */
+                char prod_fn[2];                        /* product function */
+                char record_nr;                         /* record nr. */
+                char version_nr[2];                     /* version */
+                char release_nr[2];                     /* release */
+                char mod_lvl[2];                        /* modification lvl. */
+        } appldata_product_id = {
+        /* all strings are EBCDIC, record_nr is byte */
+                .prod_nr    = {0xD3, 0xC9, 0xD5, 0xE4,
+                                0xE7, 0xD2, 0xD9},      /* "LINUXKR" */
+                .prod_fn    = {0xD5, 0xD3},             /* "NL" */
+                .record_nr  = record_nr,
+                .version_nr = {0xF2, 0xF6},             /* "26" */
+                .release_nr = {0xF0, 0xF1},             /* "01" */
+                .mod_lvl    = {0xF0, 0xF0},             /* "00" */
+        };
+        struct appldata_parameter_list appldata_parameter_list = {
+                                .diag = 0xDC,
+                                .function = function,
+                                .parlist_length =
+                                        sizeof(appldata_parameter_list),
+                                .buffer_length = length,
+                                .product_id_addr =
+                                        (unsigned long) &appldata_product_id,
+                                .buffer_addr = virt_to_phys((void *) buffer)
+        };
+
+        if (!MACHINE_IS_VM)
+                return -ENOSYS;
+        ry = -1;
+        asm volatile(
+                        "diag %1,%0,0xDC\n\t"
+                        : "=d" (ry) : "d" (&(appldata_parameter_list)) : "cc");
+        return (int) ry;
+}
+/********************** timer, tasklet, DIAG <END> ***************************/
+
+
+/****************************** /proc stuff **********************************/
+
+/*
+ * appldata_mod_vtimer_wrap()
+ *
+ * wrapper function for mod_virt_timer(), because smp_call_function_on()
+ * accepts only one parameter.
+ */
+static void __appldata_mod_vtimer_wrap(void *p) {
+        struct {
+                struct vtimer_list *timer;
+                u64    expires;
+        } *args = p;
+        mod_virt_timer(args->timer, args->expires);
+}
+
+#define APPLDATA_ADD_TIMER      0
+#define APPLDATA_DEL_TIMER      1
+#define APPLDATA_MOD_TIMER      2
+
+/*
+ * __appldata_vtimer_setup()
+ *
+ * Add, delete or modify virtual timers on all online cpus.
+ * The caller needs to get the appldata_timer_lock spinlock.
+ */
+static void
+__appldata_vtimer_setup(int cmd)
+{
+        u64 per_cpu_interval;
+        int i;
+
+        switch (cmd) {
+        case APPLDATA_ADD_TIMER:
+                if (appldata_timer_active)
+                        break;
+                per_cpu_interval = (u64) (appldata_interval*1000 /
+                                          num_online_cpus()) * TOD_MICRO;
+                for_each_online_cpu(i) {
+                        per_cpu(appldata_timer, i).expires = per_cpu_interval;
+                        smp_call_function_on(add_virt_timer_periodic,
+                                             &per_cpu(appldata_timer, i),
+                                             0, 1, i);
+                }
+                appldata_timer_active = 1;
+                P_INFO("Monitoring timer started.\n");
+                break;
+        case APPLDATA_DEL_TIMER:
+                for_each_online_cpu(i)
+                        del_virt_timer(&per_cpu(appldata_timer, i));
+                if (!appldata_timer_active)
+                        break;
+                appldata_timer_active = 0;
+                atomic_set(&appldata_expire_count, num_online_cpus());
+                P_INFO("Monitoring timer stopped.\n");
+                break;
+        case APPLDATA_MOD_TIMER:
+                per_cpu_interval = (u64) (appldata_interval*1000 /
+                                          num_online_cpus()) * TOD_MICRO;
+                if (!appldata_timer_active)
+                        break;
+                for_each_online_cpu(i) {
+                        struct {
+                                struct vtimer_list *timer;
+                                u64    expires;
+                        } args;
+                        args.timer = &per_cpu(appldata_timer, i);
+                        args.expires = per_cpu_interval;
+                        smp_call_function_on(__appldata_mod_vtimer_wrap,
+                                             &args, 0, 1, i);
+                }
+        }
+}
+
+/*
+ * appldata_timer_handler()
+ *
+ * Start/Stop timer, show status of timer (0 = not active, 1 = active)
+ */
+static int
+appldata_timer_handler(ctl_table *ctl, int write, struct file *filp,
+                           void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+        int len;
+        char buf[2];
+
+        if (!*lenp || *ppos) {
+                *lenp = 0;
+                return 0;
+        }
+        if (!write) {
+                len = sprintf(buf, appldata_timer_active ? "1\n" : "0\n");
+                if (len > *lenp)
+                        len = *lenp;
+                if (copy_to_user(buffer, buf, len))
+                        return -EFAULT;
+                goto out;
+        }
+        len = *lenp;
+        if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
+                return -EFAULT;
+        spin_lock(&appldata_timer_lock);
+        if (buf[0] == '1')
+                __appldata_vtimer_setup(APPLDATA_ADD_TIMER);
+        else if (buf[0] == '0')
+                __appldata_vtimer_setup(APPLDATA_DEL_TIMER);
+        spin_unlock(&appldata_timer_lock);
+out:
+        *lenp = len;
+        *ppos += len;
+        return 0;
+}
+
+/*
+ * appldata_interval_handler()
+ *
+ * Set (CPU) timer interval for collection of data (in milliseconds), show
+ * current timer interval.
+ */
+static int
+appldata_interval_handler(ctl_table *ctl, int write, struct file *filp,
+                           void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+        int len, interval;
+        char buf[16];
+
+        if (!*lenp || *ppos) {
+                *lenp = 0;
+                return 0;
+        }
+        if (!write) {
+                len = sprintf(buf, "%i\n", appldata_interval);
+                if (len > *lenp)
+                        len = *lenp;
+                if (copy_to_user(buffer, buf, len))
+                        return -EFAULT;
+                goto out;
+        }
+        len = *lenp;
+        if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) {
+                return -EFAULT;
+        }
+        sscanf(buf, "%i", &interval);
+        if (interval <= 0) {
+                P_ERROR("Timer CPU interval has to be > 0!\n");
+                return -EINVAL;
+        }
+
+        spin_lock(&appldata_timer_lock);
+        appldata_interval = interval;
+        __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
+        spin_unlock(&appldata_timer_lock);
+
+        P_INFO("Monitoring CPU interval set to %u milliseconds.\n",
+                 interval);
+out:
+        *lenp = len;
+        *ppos += len;
+        return 0;
+}
+
+/*
+ * appldata_generic_handler()
+ *
+ * Generic start/stop monitoring and DIAG, show status of
+ * monitoring (0 = not in process, 1 = in process)
+ */
+static int
+appldata_generic_handler(ctl_table *ctl, int write, struct file *filp,
+                           void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+        struct appldata_ops *ops = NULL, *tmp_ops;
+        int rc, len, found;
+        char buf[2];
+        struct list_head *lh;
+
+        found = 0;
+        spin_lock_bh(&appldata_ops_lock);
+        list_for_each(lh, &appldata_ops_list) {
+                tmp_ops = list_entry(lh, struct appldata_ops, list);
+                if (&tmp_ops->ctl_table[2] == ctl) {
+                        found = 1;
+                }
+        }
+        if (!found) {
+                spin_unlock_bh(&appldata_ops_lock);
+                return -ENODEV;
+        }
+        ops = ctl->data;
+        if (!try_module_get(ops->owner)) {      // protect this function
+                spin_unlock_bh(&appldata_ops_lock);
+                return -ENODEV;
+        }
+        spin_unlock_bh(&appldata_ops_lock);
+
+        if (!*lenp || *ppos) {
+                *lenp = 0;
+                module_put(ops->owner);
+                return 0;
+        }
+        if (!write) {
+                len = sprintf(buf, ops->active ? "1\n" : "0\n");
+                if (len > *lenp)
+                        len = *lenp;
+                if (copy_to_user(buffer, buf, len)) {
+                        module_put(ops->owner);
+                        return -EFAULT;
+                }
+                goto out;
+        }
+        len = *lenp;
+        if (copy_from_user(buf, buffer,
+                           len > sizeof(buf) ? sizeof(buf) : len)) {
+                module_put(ops->owner);
+                return -EFAULT;
+        }
+
+        spin_lock_bh(&appldata_ops_lock);
+        if ((buf[0] == '1') && (ops->active == 0)) {
+                if (!try_module_get(ops->owner)) {      // protect tasklet
+                        spin_unlock_bh(&appldata_ops_lock);
+                        module_put(ops->owner);
+                        return -ENODEV;
+                }
+                ops->active = 1;
+                ops->callback(ops->data);       // init record
+                rc = appldata_diag(ops->record_nr,
+                                        APPLDATA_START_INTERVAL_REC,
+                                        (unsigned long) ops->data, ops->size);
+                if (rc != 0) {
+                        P_ERROR("START DIAG 0xDC for %s failed, "
+                                "return code: %d\n", ops->name, rc);
+                        module_put(ops->owner);
+                        ops->active = 0;
+                } else {
+                        P_INFO("Monitoring %s data enabled, "
+                                "DIAG 0xDC started.\n", ops->name);
+                }
+        } else if ((buf[0] == '0') && (ops->active == 1)) {
+                ops->active = 0;
+                rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
+                                (unsigned long) ops->data, ops->size);
+                if (rc != 0) {
+                        P_ERROR("STOP DIAG 0xDC for %s failed, "
+                                "return code: %d\n", ops->name, rc);
+                } else {
+                        P_INFO("Monitoring %s data disabled, "
+                                "DIAG 0xDC stopped.\n", ops->name);
+                }
+                module_put(ops->owner);
+        }
+        spin_unlock_bh(&appldata_ops_lock);
+out:
+        *lenp = len;
+        *ppos += len;
+        module_put(ops->owner);
+        return 0;
+}
+
+/*************************** /proc stuff <END> *******************************/
+
+
+/************************* module-ops management *****************************/
+/*
+ * appldata_register_ops()
+ *
+ * update ops list, register /proc/sys entries
+ */
+int appldata_register_ops(struct appldata_ops *ops)
+{
+        struct list_head *lh;
+        struct appldata_ops *tmp_ops;
+        int i;
+
+        i = 0;
+
+        if ((ops->size > APPLDATA_MAX_REC_SIZE) ||
+                (ops->size < 0)){
+                P_ERROR("Invalid size of %s record = %i, maximum = %i!\n",
+                        ops->name, ops->size, APPLDATA_MAX_REC_SIZE);
+                return -ENOMEM;
+        }
+        if ((ops->ctl_nr == CTL_APPLDATA) ||
+            (ops->ctl_nr == CTL_APPLDATA_TIMER) ||
+            (ops->ctl_nr == CTL_APPLDATA_INTERVAL)) {
+                P_ERROR("ctl_nr %i already in use!\n", ops->ctl_nr);
+                return -EBUSY;
+        }
+        ops->ctl_table = kmalloc(4*sizeof(struct ctl_table), GFP_KERNEL);
+        if (ops->ctl_table == NULL) {
+                P_ERROR("Not enough memory for %s ctl_table!\n", ops->name);
+                return -ENOMEM;
+        }
+        memset(ops->ctl_table, 0, 4*sizeof(struct ctl_table));
+
+        spin_lock_bh(&appldata_ops_lock);
+        list_for_each(lh, &appldata_ops_list) {
+                tmp_ops = list_entry(lh, struct appldata_ops, list);
+                P_DEBUG("register_ops loop: %i) name = %s, ctl = %i\n",
+                        ++i, tmp_ops->name, tmp_ops->ctl_nr);
+                P_DEBUG("Comparing %s (ctl %i) with %s (ctl %i)\n",
+                        tmp_ops->name, tmp_ops->ctl_nr, ops->name,
+                        ops->ctl_nr);
+                if (strncmp(tmp_ops->name, ops->name,
+                                APPLDATA_PROC_NAME_LENGTH) == 0) {
+                        P_ERROR("Name \"%s\" already registered!\n", ops->name);
+                        kfree(ops->ctl_table);
+                        spin_unlock_bh(&appldata_ops_lock);
+                        return -EBUSY;
+                }
+                if (tmp_ops->ctl_nr == ops->ctl_nr) {
+                        P_ERROR("ctl_nr %i already registered!\n", ops->ctl_nr);
+                        kfree(ops->ctl_table);
+                        spin_unlock_bh(&appldata_ops_lock);
+                        return -EBUSY;
+                }
+        }
+        list_add(&ops->list, &appldata_ops_list);
+        spin_unlock_bh(&appldata_ops_lock);
+
+        ops->ctl_table[0].ctl_name = CTL_APPLDATA;
+        ops->ctl_table[0].procname = appldata_proc_name;
+        ops->ctl_table[0].maxlen   = 0;
+        ops->ctl_table[0].mode     = S_IRUGO | S_IXUGO;
+        ops->ctl_table[0].child    = &ops->ctl_table[2];
+
+        ops->ctl_table[1].ctl_name = 0;
+
+        ops->ctl_table[2].ctl_name = ops->ctl_nr;
+        ops->ctl_table[2].procname = ops->name;
+        ops->ctl_table[2].mode     = S_IRUGO | S_IWUSR;
+        ops->ctl_table[2].proc_handler = appldata_generic_handler;
+        ops->ctl_table[2].data = ops;
+
+        ops->ctl_table[3].ctl_name = 0;
+
+        ops->sysctl_header = register_sysctl_table(ops->ctl_table,1);
+
+        P_INFO("%s-ops registered!\n", ops->name);
+        return 0;
+}
+
+/*
+ * appldata_unregister_ops()
+ *
+ * update ops list, unregister /proc entries, stop DIAG if necessary
+ */
+void appldata_unregister_ops(struct appldata_ops *ops)
+{
+        spin_lock_bh(&appldata_ops_lock);
+        unregister_sysctl_table(ops->sysctl_header);
+        list_del(&ops->list);
+        kfree(ops->ctl_table);
+        ops->ctl_table = NULL;
+        spin_unlock_bh(&appldata_ops_lock);
+        P_INFO("%s-ops unregistered!\n", ops->name);
+}
+/********************** module-ops management <END> **************************/
+
+
+/******************************* init / exit *********************************/
+
+static void
+appldata_online_cpu(int cpu)
+{
+        init_virt_timer(&per_cpu(appldata_timer, cpu));
+        per_cpu(appldata_timer, cpu).function = appldata_timer_function;
+        per_cpu(appldata_timer, cpu).data = (unsigned long)
+                &appldata_tasklet_struct;
+        atomic_inc(&appldata_expire_count);
+        spin_lock(&appldata_timer_lock);
+        __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
+        spin_unlock(&appldata_timer_lock);
+}
+
+static void
+appldata_offline_cpu(int cpu)
+{
+        del_virt_timer(&per_cpu(appldata_timer, cpu));
+        if (atomic_dec_and_test(&appldata_expire_count)) {
+                atomic_set(&appldata_expire_count, num_online_cpus());
+                tasklet_schedule(&appldata_tasklet_struct);
+        }
+        spin_lock(&appldata_timer_lock);
+        __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
+        spin_unlock(&appldata_timer_lock);
+}
+
+static int
+appldata_cpu_notify(struct notifier_block *self,
+                    unsigned long action, void *hcpu)
+{
+        switch (action) {
+        case CPU_ONLINE:
+                appldata_online_cpu((long) hcpu);
+                break;
+#ifdef CONFIG_HOTPLUG_CPU
+        case CPU_DEAD:
+                appldata_offline_cpu((long) hcpu);
+                break;
+#endif
+        default:
+                break;
+        }
+        return NOTIFY_OK;
+}
+
+static struct notifier_block __devinitdata appldata_nb = {
+        .notifier_call = appldata_cpu_notify,
+};
+
+/*
+ * appldata_init()
+ *
+ * init timer and tasklet, register /proc entries
+ */
+static int __init appldata_init(void)
+{
+        int i;
+
+        P_DEBUG("sizeof(parameter_list) = %lu\n",
+                sizeof(struct appldata_parameter_list));
+
+        for_each_online_cpu(i)
+                appldata_online_cpu(i);
+
+        /* Register cpu hotplug notifier */
+        register_cpu_notifier(&appldata_nb);
+
+        appldata_sysctl_header = register_sysctl_table(appldata_dir_table, 1);
+#ifdef MODULE
+        appldata_dir_table[0].de->owner = THIS_MODULE;
+        appldata_table[0].de->owner = THIS_MODULE;
+        appldata_table[1].de->owner = THIS_MODULE;
+#endif
+
+        tasklet_init(&appldata_tasklet_struct, appldata_tasklet_function, 0);
+        P_DEBUG("Base interface initialized.\n");
+        return 0;
+}
+
+/*
+ * appldata_exit()
+ *
+ * stop timer and tasklet, unregister /proc entries
+ */
+static void __exit appldata_exit(void)
+{
+        struct list_head *lh;
+        struct appldata_ops *ops;
+        int rc, i;
+
+        P_DEBUG("Unloading module ...\n");
+        /*
+         * ops list should be empty, but just in case something went wrong...
+         */
+        spin_lock_bh(&appldata_ops_lock);
+        list_for_each(lh, &appldata_ops_list) {
+                ops = list_entry(lh, struct appldata_ops, list);
+                rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
+                                (unsigned long) ops->data, ops->size);
+                if (rc != 0) {
+                        P_ERROR("STOP DIAG 0xDC for %s failed, "
+                                "return code: %d\n", ops->name, rc);
+                }
+        }
+        spin_unlock_bh(&appldata_ops_lock);
+
+        for_each_online_cpu(i)
+                appldata_offline_cpu(i);
+
+        appldata_timer_active = 0;
+
+        unregister_sysctl_table(appldata_sysctl_header);
+
+        tasklet_kill(&appldata_tasklet_struct);
+        P_DEBUG("... module unloaded!\n");
+}
+/**************************** init / exit <END> ******************************/
+
+
+module_init(appldata_init);
+module_exit(appldata_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Gerald Schaefer");
+MODULE_DESCRIPTION("Linux-VM Monitor Stream, base infrastructure");
+
+EXPORT_SYMBOL_GPL(appldata_register_ops);
+EXPORT_SYMBOL_GPL(appldata_unregister_ops);
+
+#ifdef MODULE
+/*
+ * Kernel symbols needed by appldata_mem and appldata_os modules.
+ * However, if this file is compiled as a module (for testing only), these
+ * symbols are not exported. In this case, we define them locally and export
+ * those.
+ */
+void si_swapinfo(struct sysinfo *val)
+{
+        val->freeswap = -1ul;
+        val->totalswap = -1ul;
+}
+
+unsigned long avenrun[3] = {-1 - FIXED_1/200, -1 - FIXED_1/200,
+                                -1 - FIXED_1/200};
+int nr_threads = -1;
+
+void get_full_page_state(struct page_state *ps)
+{
+        memset(ps, -1, sizeof(struct page_state));
+}
+
+unsigned long nr_running(void)
+{
+        return -1;
+}
+
+unsigned long nr_iowait(void)
+{
+        return -1;
+}
+
+/*unsigned long nr_context_switches(void)
+{
+        return -1;
+}*/
+#endif /* MODULE */
+EXPORT_SYMBOL_GPL(si_swapinfo);
+EXPORT_SYMBOL_GPL(nr_threads);
+EXPORT_SYMBOL_GPL(avenrun);
+EXPORT_SYMBOL_GPL(get_full_page_state);
+EXPORT_SYMBOL_GPL(nr_running);
+EXPORT_SYMBOL_GPL(nr_iowait);
+//EXPORT_SYMBOL_GPL(nr_context_switches);