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, 772 insertions, 0 deletions

diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
new file mode 100644
index 000000000000..ad1841a96c87
--- /dev/null
+++ b/drivers/s390/block/dasd_devmap.c
@@ -0,0 +1,772 @@
+/*
+ * File...........: linux/drivers/s390/block/dasd_devmap.c
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ *                  Horst Hummel <Horst.Hummel@de.ibm.com>
+ *                  Carsten Otte <Cotte@de.ibm.com>
+ *                  Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001
+ *
+ * Device mapping and dasd= parameter parsing functions. All devmap
+ * functions may not be called from interrupt context. In particular
+ * dasd_get_device is a no-no from interrupt context.
+ *
+ * $Revision: 1.37 $
+ */
+
+#include <linux/config.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+
+#include <asm/debug.h>
+#include <asm/uaccess.h>
+
+/* This is ugly... */
+#define PRINTK_HEADER "dasd_devmap:"
+
+#include "dasd_int.h"
+
+kmem_cache_t *dasd_page_cache;
+EXPORT_SYMBOL(dasd_page_cache);
+
+/*
+ * dasd_devmap_t is used to store the features and the relation
+ * between device number and device index. To find a dasd_devmap_t
+ * that corresponds to a device number of a device index each
+ * dasd_devmap_t is added to two linked lists, one to search by
+ * the device number and one to search by the device index. As
+ * soon as big minor numbers are available the device index list
+ * can be removed since the device number will then be identical
+ * to the device index.
+ */
+struct dasd_devmap {
+        struct list_head list;
+        char bus_id[BUS_ID_SIZE];
+        unsigned int devindex;
+        unsigned short features;
+        struct dasd_device *device;
+};
+
+/*
+ * Parameter parsing functions for dasd= parameter. The syntax is:
+ *   <devno>            : (0x)?[0-9a-fA-F]+
+ *   <busid>            : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+
+ *   <feature>          : ro
+ *   <feature_list>     : \(<feature>(:<feature>)*\)
+ *   <devno-range>      : <devno>(-<devno>)?<feature_list>?
+ *   <busid-range>      : <busid>(-<busid>)?<feature_list>?
+ *   <devices>          : <devno-range>|<busid-range>
+ *   <dasd_module>      : dasd_diag_mod|dasd_eckd_mod|dasd_fba_mod
+ *
+ *   <dasd>             : autodetect|probeonly|<devices>(,<devices>)*
+ */
+
+int dasd_probeonly =  0;        /* is true, when probeonly mode is active */
+int dasd_autodetect = 0;        /* is true, when autodetection is active */
+
+/*
+ * char *dasd[] is intended to hold the ranges supplied by the dasd= statement
+ * it is named 'dasd' to directly be filled by insmod with the comma separated
+ * strings when running as a module.
+ */
+static char *dasd[256];
+/*
+ * Single spinlock to protect devmap structures and lists.
+ */
+static DEFINE_SPINLOCK(dasd_devmap_lock);
+
+/*
+ * Hash lists for devmap structures.
+ */
+static struct list_head dasd_hashlists[256];
+int dasd_max_devindex;
+
+static struct dasd_devmap *dasd_add_busid(char *, int);
+
+static inline int
+dasd_hash_busid(char *bus_id)
+{
+        int hash, i;
+
+        hash = 0;
+        for (i = 0; (i < BUS_ID_SIZE) && *bus_id; i++, bus_id++)
+                hash += *bus_id;
+        return hash & 0xff;
+}
+
+#ifndef MODULE
+/*
+ * The parameter parsing functions for builtin-drivers are called
+ * before kmalloc works. Store the pointers to the parameters strings
+ * into dasd[] for later processing.
+ */
+static int __init
+dasd_call_setup(char *str)
+{
+        static int count = 0;
+
+        if (count < 256)
+                dasd[count++] = str;
+        return 1;
+}
+
+__setup ("dasd=", dasd_call_setup);
+#endif  /* #ifndef MODULE */
+
+/*
+ * Read a device busid/devno from a string.
+ */
+static inline int
+dasd_busid(char **str, int *id0, int *id1, int *devno)
+{
+        int val, old_style;
+ 
+        /* check for leading '0x' */
+        old_style = 0;
+        if ((*str)[0] == '0' && (*str)[1] == 'x') {
+                *str += 2;
+                old_style = 1;
+        }
+        if (!isxdigit((*str)[0]))       /* We require at least one hex digit */
+                return -EINVAL;
+        val = simple_strtoul(*str, str, 16);
+        if (old_style || (*str)[0] != '.') {
+                *id0 = *id1 = 0;
+                if (val < 0 || val > 0xffff)
+                        return -EINVAL;
+                *devno = val;
+                return 0;
+        }
+        /* New style x.y.z busid */
+        if (val < 0 || val > 0xff)
+                return -EINVAL;
+        *id0 = val;
+        (*str)++;
+        if (!isxdigit((*str)[0]))       /* We require at least one hex digit */
+                return -EINVAL;
+        val = simple_strtoul(*str, str, 16);
+        if (val < 0 || val > 0xff || (*str)++[0] != '.')
+                return -EINVAL;
+        *id1 = val;
+        if (!isxdigit((*str)[0]))       /* We require at least one hex digit */
+                return -EINVAL;
+        val = simple_strtoul(*str, str, 16);
+        if (val < 0 || val > 0xffff)
+                return -EINVAL;
+        *devno = val;
+        return 0;
+}
+
+/*
+ * Read colon separated list of dasd features. Currently there is
+ * only one: "ro" for read-only devices. The default feature set
+ * is empty (value 0).
+ */
+static inline int
+dasd_feature_list(char *str, char **endp)
+{
+        int features, len, rc;
+
+        rc = 0;
+        if (*str != '(') {
+                *endp = str;
+                return DASD_FEATURE_DEFAULT;
+        }
+        str++;
+        features = 0;
+
+        while (1) {
+                for (len = 0; 
+                     str[len] && str[len] != ':' && str[len] != ')'; len++);
+                if (len == 2 && !strncmp(str, "ro", 2))
+                        features |= DASD_FEATURE_READONLY;
+                else if (len == 4 && !strncmp(str, "diag", 4))
+                        features |= DASD_FEATURE_USEDIAG;
+                else {
+                        MESSAGE(KERN_WARNING,
+                                "unsupported feature: %*s, "
+                                "ignoring setting", len, str);
+                        rc = -EINVAL;
+                }
+                str += len;
+                if (*str != ':')
+                        break;
+                str++;
+        }
+        if (*str != ')') {
+                MESSAGE(KERN_WARNING, "%s",
+                        "missing ')' in dasd parameter string\n");
+                rc = -EINVAL;
+        } else
+                str++;
+        *endp = str;
+        if (rc != 0)
+                return rc;
+        return features;
+}
+
+/*
+ * Try to match the first element on the comma separated parse string
+ * with one of the known keywords. If a keyword is found, take the approprate
+ * action and return a pointer to the residual string. If the first element
+ * could not be matched to any keyword then return an error code.
+ */
+static char *
+dasd_parse_keyword( char *parsestring ) {
+
+        char *nextcomma, *residual_str;
+        int length;
+
+        nextcomma = strchr(parsestring,',');
+        if (nextcomma) {
+                length = nextcomma - parsestring;
+                residual_str = nextcomma + 1;
+        } else {
+                length = strlen(parsestring);
+                residual_str = parsestring + length;
+        }
+        if (strncmp ("autodetect", parsestring, length) == 0) {
+                dasd_autodetect = 1;
+                MESSAGE (KERN_INFO, "%s",
+                         "turning to autodetection mode");
+                return residual_str;
+        }
+        if (strncmp ("probeonly", parsestring, length) == 0) {
+                dasd_probeonly = 1;
+                MESSAGE(KERN_INFO, "%s",
+                        "turning to probeonly mode");
+                return residual_str;
+        }
+        if (strncmp ("fixedbuffers", parsestring, length) == 0) {
+                if (dasd_page_cache)
+                        return residual_str;
+                dasd_page_cache =
+                        kmem_cache_create("dasd_page_cache", PAGE_SIZE, 0,
+                                          SLAB_CACHE_DMA, NULL, NULL );
+                if (!dasd_page_cache)
+                        MESSAGE(KERN_WARNING, "%s", "Failed to create slab, "
+                                "fixed buffer mode disabled.");
+                else
+                        MESSAGE (KERN_INFO, "%s",
+                                 "turning on fixed buffer mode");
+                return residual_str;
+        }
+        return ERR_PTR(-EINVAL);
+}
+
+/*
+ * Try to interprete the first element on the comma separated parse string
+ * as a device number or a range of devices. If the interpretation is
+ * successfull, create the matching dasd_devmap entries and return a pointer
+ * to the residual string.
+ * If interpretation fails or in case of an error, return an error code.
+ */
+static char *
+dasd_parse_range( char *parsestring ) {
+
+        struct dasd_devmap *devmap;
+        int from, from_id0, from_id1;
+        int to, to_id0, to_id1;
+        int features, rc;
+        char bus_id[BUS_ID_SIZE+1], *str;
+
+        str = parsestring;
+        rc = dasd_busid(&str, &from_id0, &from_id1, &from);
+        if (rc == 0) {
+                to = from;
+                to_id0 = from_id0;
+                to_id1 = from_id1;
+                if (*str == '-') {
+                        str++;
+                        rc = dasd_busid(&str, &to_id0, &to_id1, &to);
+                }
+        }
+        if (rc == 0 &&
+            (from_id0 != to_id0 || from_id1 != to_id1 || from > to))
+                rc = -EINVAL;
+        if (rc) {
+                MESSAGE(KERN_ERR, "Invalid device range %s", parsestring);
+                return ERR_PTR(rc);
+        }
+        features = dasd_feature_list(str, &str);
+        if (features < 0)
+                return ERR_PTR(-EINVAL);
+        while (from <= to) {
+                sprintf(bus_id, "%01x.%01x.%04x",
+                        from_id0, from_id1, from++);
+                devmap = dasd_add_busid(bus_id, features);
+                if (IS_ERR(devmap))
+                        return (char *)devmap;
+        }
+        if (*str == ',')
+                return str + 1;
+        if (*str == '\0')
+                return str;
+        MESSAGE(KERN_WARNING,
+                "junk at end of dasd parameter string: %s\n", str);
+        return ERR_PTR(-EINVAL);
+}
+
+static inline char *
+dasd_parse_next_element( char *parsestring ) {
+        char * residual_str;
+        residual_str = dasd_parse_keyword(parsestring);
+        if (!IS_ERR(residual_str))
+                return residual_str;
+        residual_str = dasd_parse_range(parsestring);
+        return residual_str;
+}
+
+/*
+ * Parse parameters stored in dasd[]
+ * The 'dasd=...' parameter allows to specify a comma separated list of
+ * keywords and device ranges. When the dasd driver is build into the kernel,
+ * the complete list will be stored as one element of the dasd[] array.
+ * When the dasd driver is build as a module, then the list is broken into
+ * it's elements and each dasd[] entry contains one element.
+ */
+int
+dasd_parse(void)
+{
+        int rc, i;
+        char *parsestring;
+
+        rc = 0;
+        for (i = 0; i < 256; i++) {
+                if (dasd[i] == NULL)
+                        break;
+                parsestring = dasd[i];
+                /* loop over the comma separated list in the parsestring */
+                while (*parsestring) {
+                        parsestring = dasd_parse_next_element(parsestring);
+                        if(IS_ERR(parsestring)) {
+                                rc = PTR_ERR(parsestring);
+                                break;
+                        }
+                }
+                if (rc) {
+                        DBF_EVENT(DBF_ALERT, "%s", "invalid range found");
+                        break;
+                }
+        }
+        return rc;
+}
+
+/*
+ * Add a devmap for the device specified by busid. It is possible that
+ * the devmap already exists (dasd= parameter). The order of the devices
+ * added through this function will define the kdevs for the individual
+ * devices. 
+ */
+static struct dasd_devmap *
+dasd_add_busid(char *bus_id, int features)
+{
+        struct dasd_devmap *devmap, *new, *tmp;
+        int hash;
+
+        new = (struct dasd_devmap *)
+                kmalloc(sizeof(struct dasd_devmap), GFP_KERNEL);
+        if (!new)
+                return ERR_PTR(-ENOMEM);
+        spin_lock(&dasd_devmap_lock);
+        devmap = 0;
+        hash = dasd_hash_busid(bus_id);
+        list_for_each_entry(tmp, &dasd_hashlists[hash], list)
+                if (strncmp(tmp->bus_id, bus_id, BUS_ID_SIZE) == 0) {
+                        devmap = tmp;
+                        break;
+                }
+        if (!devmap) {
+                /* This bus_id is new. */
+                new->devindex = dasd_max_devindex++;
+                strncpy(new->bus_id, bus_id, BUS_ID_SIZE);
+                new->features = features;
+                new->device = 0;
+                list_add(&new->list, &dasd_hashlists[hash]);
+                devmap = new;
+                new = 0;
+        }
+        spin_unlock(&dasd_devmap_lock);
+        if (new)
+                kfree(new);
+        return devmap;
+}
+
+/*
+ * Find devmap for device with given bus_id.
+ */
+static struct dasd_devmap *
+dasd_find_busid(char *bus_id)
+{
+        struct dasd_devmap *devmap, *tmp;
+        int hash;
+
+        spin_lock(&dasd_devmap_lock);
+        devmap = ERR_PTR(-ENODEV);
+        hash = dasd_hash_busid(bus_id);
+        list_for_each_entry(tmp, &dasd_hashlists[hash], list) {
+                if (strncmp(tmp->bus_id, bus_id, BUS_ID_SIZE) == 0) {
+                        devmap = tmp;
+                        break;
+                }
+        }
+        spin_unlock(&dasd_devmap_lock);
+        return devmap;
+}
+
+/*
+ * Check if busid has been added to the list of dasd ranges.
+ */
+int
+dasd_busid_known(char *bus_id)
+{
+        return IS_ERR(dasd_find_busid(bus_id)) ? -ENOENT : 0;
+}
+
+/*
+ * Forget all about the device numbers added so far.
+ * This may only be called at module unload or system shutdown.
+ */
+static void
+dasd_forget_ranges(void)
+{
+        struct dasd_devmap *devmap, *n;
+        int i;
+
+        spin_lock(&dasd_devmap_lock);
+        for (i = 0; i < 256; i++) {
+                list_for_each_entry_safe(devmap, n, &dasd_hashlists[i], list) {
+                        if (devmap->device != NULL)
+                                BUG();
+                        list_del(&devmap->list);
+                        kfree(devmap);
+                }
+        }
+        spin_unlock(&dasd_devmap_lock);
+}
+
+/*
+ * Find the device struct by its device index.
+ */
+struct dasd_device *
+dasd_device_from_devindex(int devindex)
+{
+        struct dasd_devmap *devmap, *tmp;
+        struct dasd_device *device;
+        int i;
+
+        spin_lock(&dasd_devmap_lock);
+        devmap = 0;
+        for (i = 0; (i < 256) && !devmap; i++)
+                list_for_each_entry(tmp, &dasd_hashlists[i], list)
+                        if (tmp->devindex == devindex) {
+                                /* Found the devmap for the device. */
+                                devmap = tmp;
+                                break;
+                        }
+        if (devmap && devmap->device) {
+                device = devmap->device;
+                dasd_get_device(device);
+        } else
+                device = ERR_PTR(-ENODEV);
+        spin_unlock(&dasd_devmap_lock);
+        return device;
+}
+
+/*
+ * Return devmap for cdev. If no devmap exists yet, create one and
+ * connect it to the cdev.
+ */
+static struct dasd_devmap *
+dasd_devmap_from_cdev(struct ccw_device *cdev)
+{
+        struct dasd_devmap *devmap;
+
+        devmap = dasd_find_busid(cdev->dev.bus_id);
+        if (IS_ERR(devmap))
+                devmap = dasd_add_busid(cdev->dev.bus_id,
+                                        DASD_FEATURE_DEFAULT);
+        return devmap;
+}
+
+/*
+ * Create a dasd device structure for cdev.
+ */
+struct dasd_device *
+dasd_create_device(struct ccw_device *cdev)
+{
+        struct dasd_devmap *devmap;
+        struct dasd_device *device;
+        int rc;
+
+        devmap = dasd_devmap_from_cdev(cdev);
+        if (IS_ERR(devmap))
+                return (void *) devmap;
+        cdev->dev.driver_data = devmap;
+
+        device = dasd_alloc_device();
+        if (IS_ERR(device))
+                return device;
+        atomic_set(&device->ref_count, 2);
+
+        spin_lock(&dasd_devmap_lock);
+        if (!devmap->device) {
+                devmap->device = device;
+                device->devindex = devmap->devindex;
+                if (devmap->features & DASD_FEATURE_READONLY)
+                        set_bit(DASD_FLAG_RO, &device->flags);
+                else
+                        clear_bit(DASD_FLAG_RO, &device->flags);
+                if (devmap->features & DASD_FEATURE_USEDIAG)
+                        set_bit(DASD_FLAG_USE_DIAG, &device->flags);
+                else
+                        clear_bit(DASD_FLAG_USE_DIAG, &device->flags);
+                get_device(&cdev->dev);
+                device->cdev = cdev;
+                rc = 0;
+        } else
+                /* Someone else was faster. */
+                rc = -EBUSY;
+        spin_unlock(&dasd_devmap_lock);
+
+        if (rc) {
+                dasd_free_device(device);
+                return ERR_PTR(rc);
+        }
+        return device;
+}
+
+/*
+ * Wait queue for dasd_delete_device waits.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(dasd_delete_wq);
+
+/*
+ * Remove a dasd device structure. The passed referenced
+ * is destroyed.
+ */
+void
+dasd_delete_device(struct dasd_device *device)
+{
+        struct ccw_device *cdev;
+        struct dasd_devmap *devmap;
+
+        /* First remove device pointer from devmap. */
+        devmap = dasd_find_busid(device->cdev->dev.bus_id);
+        if (IS_ERR(devmap))
+                BUG();
+        spin_lock(&dasd_devmap_lock);
+        if (devmap->device != device) {
+                spin_unlock(&dasd_devmap_lock);
+                dasd_put_device(device);
+                return;
+        }
+        devmap->device = NULL;
+        spin_unlock(&dasd_devmap_lock);
+
+        /* Drop ref_count by 2, one for the devmap reference and
+         * one for the passed reference. */
+        atomic_sub(2, &device->ref_count);
+
+        /* Wait for reference counter to drop to zero. */
+        wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0);
+
+        /* Disconnect dasd_device structure from ccw_device structure. */
+        cdev = device->cdev;
+        device->cdev = NULL;
+
+        /* Disconnect dasd_devmap structure from ccw_device structure. */
+        cdev->dev.driver_data = NULL;
+
+        /* Put ccw_device structure. */
+        put_device(&cdev->dev);
+
+        /* Now the device structure can be freed. */
+        dasd_free_device(device);
+}
+
+/*
+ * Reference counter dropped to zero. Wake up waiter
+ * in dasd_delete_device.
+ */
+void
+dasd_put_device_wake(struct dasd_device *device)
+{
+        wake_up(&dasd_delete_wq);
+}
+
+/*
+ * Return dasd_device structure associated with cdev.
+ */
+struct dasd_device *
+dasd_device_from_cdev(struct ccw_device *cdev)
+{
+        struct dasd_devmap *devmap;
+        struct dasd_device *device;
+
+        device = ERR_PTR(-ENODEV);
+        spin_lock(&dasd_devmap_lock);
+        devmap = cdev->dev.driver_data;
+        if (devmap && devmap->device) {
+                device = devmap->device;
+                dasd_get_device(device);
+        }
+        spin_unlock(&dasd_devmap_lock);
+        return device;
+}
+
+/*
+ * SECTION: files in sysfs
+ */
+
+/*
+ * readonly controls the readonly status of a dasd
+ */
+static ssize_t
+dasd_ro_show(struct device *dev, char *buf)
+{
+        struct dasd_devmap *devmap;
+        int ro_flag;
+
+        devmap = dasd_find_busid(dev->bus_id);
+        if (!IS_ERR(devmap))
+                ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0;
+        else
+                ro_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_READONLY) != 0;
+        return snprintf(buf, PAGE_SIZE, ro_flag ? "1\n" : "0\n");
+}
+
+static ssize_t
+dasd_ro_store(struct device *dev, const char *buf, size_t count)
+{
+        struct dasd_devmap *devmap;
+        int ro_flag;
+
+        devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(devmap))
+                return PTR_ERR(devmap);
+        ro_flag = buf[0] == '1';
+        spin_lock(&dasd_devmap_lock);
+        if (ro_flag)
+                devmap->features |= DASD_FEATURE_READONLY;
+        else
+                devmap->features &= ~DASD_FEATURE_READONLY;
+        if (devmap->device) {
+                if (devmap->device->gdp)
+                        set_disk_ro(devmap->device->gdp, ro_flag);
+                if (ro_flag)
+                        set_bit(DASD_FLAG_RO, &devmap->device->flags);
+                else
+                        clear_bit(DASD_FLAG_RO, &devmap->device->flags);
+        }
+        spin_unlock(&dasd_devmap_lock);
+        return count;
+}
+
+static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store);
+
+/*
+ * use_diag controls whether the driver should use diag rather than ssch
+ * to talk to the device
+ */
+static ssize_t 
+dasd_use_diag_show(struct device *dev, char *buf)
+{
+        struct dasd_devmap *devmap;
+        int use_diag;
+
+        devmap = dasd_find_busid(dev->bus_id);
+        if (!IS_ERR(devmap))
+                use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0;
+        else
+                use_diag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USEDIAG) != 0;
+        return sprintf(buf, use_diag ? "1\n" : "0\n");
+}
+
+static ssize_t
+dasd_use_diag_store(struct device *dev, const char *buf, size_t count)
+{
+        struct dasd_devmap *devmap;
+        ssize_t rc;
+        int use_diag;
+
+        devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(devmap))
+                return PTR_ERR(devmap);
+        use_diag = buf[0] == '1';
+        spin_lock(&dasd_devmap_lock);
+        /* Changing diag discipline flag is only allowed in offline state. */
+        rc = count;
+        if (!devmap->device) {
+                if (use_diag)
+                        devmap->features |= DASD_FEATURE_USEDIAG;
+                else
+                        devmap->features &= ~DASD_FEATURE_USEDIAG;
+        } else
+                rc = -EPERM;
+        spin_unlock(&dasd_devmap_lock);
+        return rc;
+}
+
+static
+DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store);
+
+static ssize_t
+dasd_discipline_show(struct device *dev, char *buf)
+{
+        struct dasd_devmap *devmap;
+        char *dname;
+
+        spin_lock(&dasd_devmap_lock);
+        dname = "none";
+        devmap = dev->driver_data;
+        if (devmap && devmap->device && devmap->device->discipline)
+                dname = devmap->device->discipline->name;
+        spin_unlock(&dasd_devmap_lock);
+        return snprintf(buf, PAGE_SIZE, "%s\n", dname);
+}
+
+static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL);
+
+static struct attribute * dasd_attrs[] = {
+        &dev_attr_readonly.attr,
+        &dev_attr_discipline.attr,
+        &dev_attr_use_diag.attr,
+        NULL,
+};
+
+static struct attribute_group dasd_attr_group = {
+        .attrs = dasd_attrs,
+};
+
+int
+dasd_add_sysfs_files(struct ccw_device *cdev)
+{
+        return sysfs_create_group(&cdev->dev.kobj, &dasd_attr_group);
+}
+
+void
+dasd_remove_sysfs_files(struct ccw_device *cdev)
+{
+        sysfs_remove_group(&cdev->dev.kobj, &dasd_attr_group);
+}
+
+
+int
+dasd_devmap_init(void)
+{
+        int i;
+
+        /* Initialize devmap structures. */
+        dasd_max_devindex = 0;
+        for (i = 0; i < 256; i++)
+                INIT_LIST_HEAD(&dasd_hashlists[i]);
+        return 0;
+
+}
+
+void
+dasd_devmap_exit(void)
+{
+        dasd_forget_ranges();
+}