ide: move IDE settings handling to ide-proc.c

* move
	__ide_add_setting()
	ide_add_setting()
	__ide_remove_setting()
	auto_remove_settings()
	ide_find_setting_by_name()
	ide_read_setting()
	ide_write_setting()
	set_xfer_rate()
	ide_add_generic_settings()
	ide_register_subdriver()
	ide_unregister_subdriver()

  from ide.c to ide-proc.c

* set_{io_32bit,pio_mode,using_dma}() cannot be marked static now, fix it

* rename ide_[un]register_subdriver() to ide_proc_[un]register_driver(),
  update device drivers to use new names

* add CONFIG_IDE_PROC_FS=n versions of ide_proc_[un]register_driver()
  and ide_add_generic_settings()

* make ide_find_setting_by_name(), ide_{read,write}_setting()
  and ide_{add,remove}_proc_entries() static

* cover IDE settings code in device drivers with CONFIG_IDE_PROC_FS #ifdef,
  also while at it cover with CONFIG_IDE_PROC_FS #ifdef ide_driver_t.proc

* remove bogus comment from ide.h

* cover with CONFIG_IDE_PROC_FS #ifdef .proc and .settings in ide_drive_t

Besides saner code this patch results in the IDE core smaller by ~2 kB
(on x86-32) and IDE disk driver by ~1 kB (ditto) when CONFIG_IDE_PROC_FS=n.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

8 files changed, 378 insertions, 363 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 29408cfd9869..252ab8295edf 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -3059,10 +3059,14 @@ int ide_cdrom_probe_capabilities (ide_drive_t *drive)
         return nslots;
 }
 
+#ifdef CONFIG_IDE_PROC_FS
 static void ide_cdrom_add_settings(ide_drive_t *drive)
 {
         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
 }
+#else
+static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
+#endif
 
 /*
  * standard prep_rq_fn that builds 10 byte cmds
@@ -3291,7 +3295,7 @@ static void ide_cd_remove(ide_drive_t *drive)
 {
         struct cdrom_info *info = drive->driver_data;
 
-        ide_unregister_subdriver(drive, info->driver);
+        ide_proc_unregister_driver(drive, info->driver);
 
         del_gendisk(info->disk);
 
@@ -3336,8 +3340,6 @@ static ide_proc_entry_t idecd_proc[] = {
         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
         { NULL, 0, NULL, NULL }
 };
-#else
-# define idecd_proc     NULL
 #endif
 
 static ide_driver_t ide_cdrom_driver = {
@@ -3355,7 +3357,9 @@ static ide_driver_t ide_cdrom_driver = {
         .end_request            = ide_end_request,
         .error                  = __ide_error,
         .abort                  = __ide_abort,
+#ifdef CONFIG_IDE_PROC_FS
         .proc                   = idecd_proc,
+#endif
 };
 
 static int idecd_open(struct inode * inode, struct file * file)
@@ -3517,7 +3521,7 @@ static int ide_cd_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        ide_register_subdriver(drive, &ide_cdrom_driver);
+        ide_proc_register_driver(drive, &ide_cdrom_driver);
 
         kref_init(&info->kref);
 
@@ -3534,7 +3538,7 @@ static int ide_cd_probe(ide_drive_t *drive)
         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
         if (ide_cdrom_setup(drive)) {
                 struct cdrom_device_info *devinfo = &info->devinfo;
-                ide_unregister_subdriver(drive, &ide_cdrom_driver);
+                ide_proc_unregister_driver(drive, &ide_cdrom_driver);
                 kfree(info->buffer);
                 kfree(info->toc);
                 kfree(info->changer_info);
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index fb162cb3ebf5..7fff773f2df7 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -560,7 +560,6 @@ static sector_t idedisk_capacity (ide_drive_t *drive)
 }
 
 #ifdef CONFIG_IDE_PROC_FS
-
 static int smart_enable(ide_drive_t *drive)
 {
         ide_task_t args;
@@ -678,11 +677,6 @@ static ide_proc_entry_t idedisk_proc[] = {
         { "smart_thresholds",   S_IFREG|S_IRUSR,        proc_idedisk_read_smart_thresholds,     NULL },
         { NULL, 0, NULL, NULL }
 };
-
-#else
-
-#define idedisk_proc    NULL
-
 #endif  /* CONFIG_IDE_PROC_FS */
 
 static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
@@ -881,6 +875,7 @@ static int set_lba_addressing(ide_drive_t *drive, int arg)
         return 0;
 }
 
+#ifdef CONFIG_IDE_PROC_FS
 static void idedisk_add_settings(ide_drive_t *drive)
 {
         struct hd_driveid *id = drive->id;
@@ -898,6 +893,9 @@ static void idedisk_add_settings(ide_drive_t *drive)
         ide_add_setting(drive,  "failures",     SETTING_RW,     TYPE_INT,       0,      65535,                  1,      1,      &drive->failures,       NULL);
         ide_add_setting(drive,  "max_failures", SETTING_RW,     TYPE_INT,       0,      65535,                  1,      1,      &drive->max_failures,   NULL);
 }
+#else
+static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
+#endif
 
 static void idedisk_setup (ide_drive_t *drive)
 {
@@ -1016,7 +1014,7 @@ static void ide_disk_remove(ide_drive_t *drive)
         struct ide_disk_obj *idkp = drive->driver_data;
         struct gendisk *g = idkp->disk;
 
-        ide_unregister_subdriver(drive, idkp->driver);
+        ide_proc_unregister_driver(drive, idkp->driver);
 
         del_gendisk(g);
 
@@ -1081,7 +1079,9 @@ static ide_driver_t idedisk_driver = {
         .end_request            = ide_end_request,
         .error                  = __ide_error,
         .abort                  = __ide_abort,
+#ifdef CONFIG_IDE_PROC_FS
         .proc                   = idedisk_proc,
+#endif
 };
 
 static int idedisk_open(struct inode *inode, struct file *filp)
@@ -1257,7 +1257,7 @@ static int ide_disk_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        ide_register_subdriver(drive, &idedisk_driver);
+        ide_proc_register_driver(drive, &idedisk_driver);
 
         kref_init(&idkp->kref);
 
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 38fe45cf4019..f429be88c4f9 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -1811,6 +1811,7 @@ static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
         return 0;
 }
 
+#ifdef CONFIG_IDE_PROC_FS
 static void idefloppy_add_settings(ide_drive_t *drive)
 {
         idefloppy_floppy_t *floppy = drive->driver_data;
@@ -1823,6 +1824,9 @@ static void idefloppy_add_settings(ide_drive_t *drive)
         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
 }
+#else
+static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
+#endif
 
 /*
  *      Driver initialization.
@@ -1873,7 +1877,7 @@ static void ide_floppy_remove(ide_drive_t *drive)
         idefloppy_floppy_t *floppy = drive->driver_data;
         struct gendisk *g = floppy->disk;
 
-        ide_unregister_subdriver(drive, floppy->driver);
+        ide_proc_unregister_driver(drive, floppy->driver);
 
         del_gendisk(g);
 
@@ -1893,7 +1897,6 @@ static void ide_floppy_release(struct kref *kref)
 }
 
 #ifdef CONFIG_IDE_PROC_FS
-
 static int proc_idefloppy_read_capacity
         (char *page, char **start, off_t off, int count, int *eof, void *data)
 {
@@ -1909,11 +1912,6 @@ static ide_proc_entry_t idefloppy_proc[] = {
         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
         { NULL, 0, NULL, NULL }
 };
-
-#else
-
-#define idefloppy_proc  NULL
-
 #endif  /* CONFIG_IDE_PROC_FS */
 
 static int ide_floppy_probe(ide_drive_t *);
@@ -1933,7 +1931,9 @@ static ide_driver_t idefloppy_driver = {
         .end_request            = idefloppy_do_end_request,
         .error                  = __ide_error,
         .abort                  = __ide_abort,
+#ifdef CONFIG_IDE_PROC_FS
         .proc                   = idefloppy_proc,
+#endif
 };
 
 static int idefloppy_open(struct inode *inode, struct file *filp)
@@ -2159,7 +2159,7 @@ static int ide_floppy_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        ide_register_subdriver(drive, &idefloppy_driver);
+        ide_proc_register_driver(drive, &idefloppy_driver);
 
         kref_init(&floppy->kref);
 
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index a9e0b30fb1f2..949a6f609d84 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -3,6 +3,8 @@
  *
  *  Copyright (C) 1997-1998     Mark Lord
  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
+ *
+ *  Some code was moved here from ide.c, see it for original copyrights.
  */
 
 /*
@@ -121,6 +123,265 @@ static int proc_ide_read_identify
         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 }
 
+/**
+ *      __ide_add_setting       -       add an ide setting option
+ *      @drive: drive to use
+ *      @name: setting name
+ *      @rw: true if the function is read write
+ *      @data_type: type of data
+ *      @min: range minimum
+ *      @max: range maximum
+ *      @mul_factor: multiplication scale
+ *      @div_factor: divison scale
+ *      @data: private data field
+ *      @set: setting
+ *      @auto_remove: setting auto removal flag
+ *
+ *      Removes the setting named from the device if it is present.
+ *      The function takes the settings_lock to protect against
+ *      parallel changes. This function must not be called from IRQ
+ *      context. Returns 0 on success or -1 on failure.
+ *
+ *      BUGS: This code is seriously over-engineered. There is also
+ *      magic about how the driver specific features are setup. If
+ *      a driver is attached we assume the driver settings are auto
+ *      remove.
+ */
+
+static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
+{
+        ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
+
+        down(&ide_setting_sem);
+        while ((*p) && strcmp((*p)->name, name) < 0)
+                p = &((*p)->next);
+        if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
+                goto abort;
+        if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
+                goto abort;
+        strcpy(setting->name, name);
+        setting->rw = rw;
+        setting->data_type = data_type;
+        setting->min = min;
+        setting->max = max;
+        setting->mul_factor = mul_factor;
+        setting->div_factor = div_factor;
+        setting->data = data;
+        setting->set = set;
+
+        setting->next = *p;
+        if (auto_remove)
+                setting->auto_remove = 1;
+        *p = setting;
+        up(&ide_setting_sem);
+        return 0;
+abort:
+        up(&ide_setting_sem);
+        kfree(setting);
+        return -1;
+}
+
+int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
+{
+        return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
+}
+
+EXPORT_SYMBOL(ide_add_setting);
+
+/**
+ *      __ide_remove_setting    -       remove an ide setting option
+ *      @drive: drive to use
+ *      @name: setting name
+ *
+ *      Removes the setting named from the device if it is present.
+ *      The caller must hold the setting semaphore.
+ */
+
+static void __ide_remove_setting (ide_drive_t *drive, char *name)
+{
+        ide_settings_t **p, *setting;
+
+        p = (ide_settings_t **) &drive->settings;
+
+        while ((*p) && strcmp((*p)->name, name))
+                p = &((*p)->next);
+        if ((setting = (*p)) == NULL)
+                return;
+
+        (*p) = setting->next;
+
+        kfree(setting->name);
+        kfree(setting);
+}
+
+/**
+ *      auto_remove_settings    -       remove driver specific settings
+ *      @drive: drive
+ *
+ *      Automatically remove all the driver specific settings for this
+ *      drive. This function may not be called from IRQ context. The
+ *      caller must hold ide_setting_sem.
+ */
+
+static void auto_remove_settings (ide_drive_t *drive)
+{
+        ide_settings_t *setting;
+repeat:
+        setting = drive->settings;
+        while (setting) {
+                if (setting->auto_remove) {
+                        __ide_remove_setting(drive, setting->name);
+                        goto repeat;
+                }
+                setting = setting->next;
+        }
+}
+
+/**
+ *      ide_find_setting_by_name        -       find a drive specific setting
+ *      @drive: drive to scan
+ *      @name: setting name
+ *
+ *      Scan's the device setting table for a matching entry and returns
+ *      this or NULL if no entry is found. The caller must hold the
+ *      setting semaphore
+ */
+
+static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
+{
+        ide_settings_t *setting = drive->settings;
+
+        while (setting) {
+                if (strcmp(setting->name, name) == 0)
+                        break;
+                setting = setting->next;
+        }
+        return setting;
+}
+
+/**
+ *      ide_read_setting        -       read an IDE setting
+ *      @drive: drive to read from
+ *      @setting: drive setting
+ *
+ *      Read a drive setting and return the value. The caller
+ *      must hold the ide_setting_sem when making this call.
+ *
+ *      BUGS: the data return and error are the same return value
+ *      so an error -EINVAL and true return of the same value cannot
+ *      be told apart
+ */
+
+static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
+{
+        int             val = -EINVAL;
+        unsigned long   flags;
+
+        if ((setting->rw & SETTING_READ)) {
+                spin_lock_irqsave(&ide_lock, flags);
+                switch(setting->data_type) {
+                        case TYPE_BYTE:
+                                val = *((u8 *) setting->data);
+                                break;
+                        case TYPE_SHORT:
+                                val = *((u16 *) setting->data);
+                                break;
+                        case TYPE_INT:
+                                val = *((u32 *) setting->data);
+                                break;
+                }
+                spin_unlock_irqrestore(&ide_lock, flags);
+        }
+        return val;
+}
+
+/**
+ *      ide_write_setting       -       read an IDE setting
+ *      @drive: drive to read from
+ *      @setting: drive setting
+ *      @val: value
+ *
+ *      Write a drive setting if it is possible. The caller
+ *      must hold the ide_setting_sem when making this call.
+ *
+ *      BUGS: the data return and error are the same return value
+ *      so an error -EINVAL and true return of the same value cannot
+ *      be told apart
+ *
+ *      FIXME:  This should be changed to enqueue a special request
+ *      to the driver to change settings, and then wait on a sema for completion.
+ *      The current scheme of polling is kludgy, though safe enough.
+ */
+
+static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
+{
+        if (!capable(CAP_SYS_ADMIN))
+                return -EACCES;
+        if (setting->set)
+                return setting->set(drive, val);
+        if (!(setting->rw & SETTING_WRITE))
+                return -EPERM;
+        if (val < setting->min || val > setting->max)
+                return -EINVAL;
+        if (ide_spin_wait_hwgroup(drive))
+                return -EBUSY;
+        switch (setting->data_type) {
+                case TYPE_BYTE:
+                        *((u8 *) setting->data) = val;
+                        break;
+                case TYPE_SHORT:
+                        *((u16 *) setting->data) = val;
+                        break;
+                case TYPE_INT:
+                        *((u32 *) setting->data) = val;
+                        break;
+        }
+        spin_unlock_irq(&ide_lock);
+        return 0;
+}
+
+static int set_xfer_rate (ide_drive_t *drive, int arg)
+{
+        int err;
+
+        if (arg < 0 || arg > 70)
+                return -EINVAL;
+
+        err = ide_wait_cmd(drive,
+                        WIN_SETFEATURES, (u8) arg,
+                        SETFEATURES_XFER, 0, NULL);
+
+        if (!err && arg) {
+                ide_set_xfer_rate(drive, (u8) arg);
+                ide_driveid_update(drive);
+        }
+        return err;
+}
+
+/**
+ *      ide_add_generic_settings        -       generic ide settings
+ *      @drive: drive being configured
+ *
+ *      Add the generic parts of the system settings to the /proc files.
+ *      The caller must not be holding the ide_setting_sem.
+ */
+
+void ide_add_generic_settings (ide_drive_t *drive)
+{
+/*
+ *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
+ */
+        __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
+        __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
+        __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
+        __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
+        __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
+        __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
+        __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
+        __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
+        __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
+}
+
 static void proc_ide_settings_warn(void)
 {
         static int warned = 0;
@@ -399,7 +660,7 @@ static ide_proc_entry_t generic_drive_entries[] = {
         { NULL, 0, NULL, NULL }
 };
 
-void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
+static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
 {
         struct proc_dir_entry *ent;
 
@@ -415,7 +676,7 @@ void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void
         }
 }
 
-void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
+static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
 {
         if (!dir || !p)
                 return;
@@ -425,6 +686,51 @@ void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
         }
 }
 
+void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
+{
+        ide_add_proc_entries(drive->proc, driver->proc, drive);
+}
+
+EXPORT_SYMBOL(ide_proc_register_driver);
+
+/**
+ *      ide_proc_unregister_driver      -       remove driver specific data
+ *      @drive: drive
+ *      @driver: driver
+ *
+ *      Clean up the driver specific /proc files and IDE settings
+ *      for a given drive.
+ *
+ *      Takes ide_setting_sem and ide_lock.
+ *      Caller must hold none of the locks.
+ */
+
+void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
+{
+        unsigned long flags;
+
+        ide_remove_proc_entries(drive->proc, driver->proc);
+
+        down(&ide_setting_sem);
+        spin_lock_irqsave(&ide_lock, flags);
+        /*
+         * ide_setting_sem protects the settings list
+         * ide_lock protects the use of settings
+         *
+         * so we need to hold both, ide_settings_sem because we want to
+         * modify the settings list, and ide_lock because we cannot take
+         * a setting out that is being used.
+         *
+         * OTOH both ide_{read,write}_setting are only ever used under
+         * ide_setting_sem.
+         */
+        auto_remove_settings(drive);
+        spin_unlock_irqrestore(&ide_lock, flags);
+        up(&ide_setting_sem);
+}
+
+EXPORT_SYMBOL(ide_proc_unregister_driver);
+
 static void create_proc_ide_drives(ide_hwif_t *hwif)
 {
         int     d;
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index fa0d22de37a7..e82bfa5e0ab8 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -4561,6 +4561,8 @@ static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive)
         printk(KERN_INFO "ide-tape: Adjusted block size - %d\n", tape->tape_block_size);
 #endif /* IDETAPE_DEBUG_INFO */
 }
+
+#ifdef CONFIG_IDE_PROC_FS
 static void idetape_add_settings (ide_drive_t *drive)
 {
         idetape_tape_t *tape = drive->driver_data;
@@ -4583,6 +4585,9 @@ static void idetape_add_settings (ide_drive_t *drive)
         ide_add_setting(drive,  "avg_speed",            SETTING_READ,   TYPE_INT,       0,                      0xffff,                 1,                              1,              &tape->avg_speed,                       NULL);
         ide_add_setting(drive,  "debug_level",          SETTING_RW,     TYPE_INT,       0,                      0xffff,                 1,                              1,              &tape->debug_level,                     NULL);
 }
+#else
+static inline void idetape_add_settings(ide_drive_t *drive) { ; }
+#endif
 
 /*
  *      ide_setup is called to:
@@ -4703,7 +4708,7 @@ static void ide_tape_remove(ide_drive_t *drive)
 {
         idetape_tape_t *tape = drive->driver_data;
 
-        ide_unregister_subdriver(drive, tape->driver);
+        ide_proc_unregister_driver(drive, tape->driver);
 
         ide_unregister_region(tape->disk);
 
@@ -4731,7 +4736,6 @@ static void ide_tape_release(struct kref *kref)
 }
 
 #ifdef CONFIG_IDE_PROC_FS
-
 static int proc_idetape_read_name
         (char *page, char **start, off_t off, int count, int *eof, void *data)
 {
@@ -4749,11 +4753,6 @@ static ide_proc_entry_t idetape_proc[] = {
         { "name",       S_IFREG|S_IRUGO,        proc_idetape_read_name, NULL },
         { NULL, 0, NULL, NULL }
 };
-
-#else
-
-#define idetape_proc    NULL
-
 #endif
 
 static int ide_tape_probe(ide_drive_t *);
@@ -4773,7 +4772,9 @@ static ide_driver_t idetape_driver = {
         .end_request            = idetape_end_request,
         .error                  = __ide_error,
         .abort                  = __ide_abort,
+#ifdef CONFIG_IDE_PROC_FS
         .proc                   = idetape_proc,
+#endif
 };
 
 /*
@@ -4864,7 +4865,7 @@ static int ide_tape_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        ide_register_subdriver(drive, &idetape_driver);
+        ide_proc_register_driver(drive, &idetape_driver);
 
         kref_init(&tape->kref);
 
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 8793a960210c..614c5fd43cd2 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -826,178 +826,6 @@ DECLARE_MUTEX(ide_setting_sem);
 EXPORT_SYMBOL_GPL(ide_setting_sem);
 
 /**
- *      __ide_add_setting       -       add an ide setting option
- *      @drive: drive to use
- *      @name: setting name
- *      @rw: true if the function is read write
- *      @data_type: type of data
- *      @min: range minimum
- *      @max: range maximum
- *      @mul_factor: multiplication scale
- *      @div_factor: divison scale
- *      @data: private data field
- *      @set: setting
- *      @auto_remove: setting auto removal flag
- *
- *      Removes the setting named from the device if it is present.
- *      The function takes the settings_lock to protect against 
- *      parallel changes. This function must not be called from IRQ
- *      context. Returns 0 on success or -1 on failure.
- *
- *      BUGS: This code is seriously over-engineered. There is also
- *      magic about how the driver specific features are setup. If
- *      a driver is attached we assume the driver settings are auto
- *      remove.
- */
-
-static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
-{
-        ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
-
-        down(&ide_setting_sem);
-        while ((*p) && strcmp((*p)->name, name) < 0)
-                p = &((*p)->next);
-        if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
-                goto abort;
-        if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
-                goto abort;
-        strcpy(setting->name, name);
-        setting->rw = rw;
-        setting->data_type = data_type;
-        setting->min = min;
-        setting->max = max;
-        setting->mul_factor = mul_factor;
-        setting->div_factor = div_factor;
-        setting->data = data;
-        setting->set = set;
-        
-        setting->next = *p;
-        if (auto_remove)
-                setting->auto_remove = 1;
-        *p = setting;
-        up(&ide_setting_sem);
-        return 0;
-abort:
-        up(&ide_setting_sem);
-        kfree(setting);
-        return -1;
-}
-
-int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
-{
-        return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
-}
-
-EXPORT_SYMBOL(ide_add_setting);
-
-/**
- *      __ide_remove_setting    -       remove an ide setting option
- *      @drive: drive to use
- *      @name: setting name
- *
- *      Removes the setting named from the device if it is present.
- *      The caller must hold the setting semaphore.
- */
- 
-static void __ide_remove_setting (ide_drive_t *drive, char *name)
-{
-        ide_settings_t **p, *setting;
-
-        p = (ide_settings_t **) &drive->settings;
-
-        while ((*p) && strcmp((*p)->name, name))
-                p = &((*p)->next);
-        if ((setting = (*p)) == NULL)
-                return;
-
-        (*p) = setting->next;
-        
-        kfree(setting->name);
-        kfree(setting);
-}
-
-/**
- *      ide_find_setting_by_name        -       find a drive specific setting
- *      @drive: drive to scan
- *      @name: setting name
- *
- *      Scan's the device setting table for a matching entry and returns
- *      this or NULL if no entry is found. The caller must hold the
- *      setting semaphore
- */
- 
-ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
-{
-        ide_settings_t *setting = drive->settings;
-
-        while (setting) {
-                if (strcmp(setting->name, name) == 0)
-                        break;
-                setting = setting->next;
-        }
-        return setting;
-}
-
-/**
- *      auto_remove_settings    -       remove driver specific settings
- *      @drive: drive
- *
- *      Automatically remove all the driver specific settings for this
- *      drive. This function may not be called from IRQ context. The
- *      caller must hold ide_setting_sem.
- */
- 
-static void auto_remove_settings (ide_drive_t *drive)
-{
-        ide_settings_t *setting;
-repeat:
-        setting = drive->settings;
-        while (setting) {
-                if (setting->auto_remove) {
-                        __ide_remove_setting(drive, setting->name);
-                        goto repeat;
-                }
-                setting = setting->next;
-        }
-}
-
-/**
- *      ide_read_setting        -       read an IDE setting
- *      @drive: drive to read from
- *      @setting: drive setting
- *
- *      Read a drive setting and return the value. The caller
- *      must hold the ide_setting_sem when making this call.
- *
- *      BUGS: the data return and error are the same return value
- *      so an error -EINVAL and true return of the same value cannot
- *      be told apart
- */
- 
-int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
-{
-        int             val = -EINVAL;
-        unsigned long   flags;
-
-        if ((setting->rw & SETTING_READ)) {
-                spin_lock_irqsave(&ide_lock, flags);
-                switch(setting->data_type) {
-                        case TYPE_BYTE:
-                                val = *((u8 *) setting->data);
-                                break;
-                        case TYPE_SHORT:
-                                val = *((u16 *) setting->data);
-                                break;
-                        case TYPE_INT:
-                                val = *((u32 *) setting->data);
-                                break;
-                }
-                spin_unlock_irqrestore(&ide_lock, flags);
-        }
-        return val;
-}
-
-/**
  *      ide_spin_wait_hwgroup   -       wait for group
  *      @drive: drive in the group
  *
@@ -1030,52 +858,7 @@ int ide_spin_wait_hwgroup (ide_drive_t *drive)
 
 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 
-/**
- *      ide_write_setting       -       read an IDE setting
- *      @drive: drive to read from
- *      @setting: drive setting
- *      @val: value
- *
- *      Write a drive setting if it is possible. The caller
- *      must hold the ide_setting_sem when making this call.
- *
- *      BUGS: the data return and error are the same return value
- *      so an error -EINVAL and true return of the same value cannot
- *      be told apart
- *
- *      FIXME:  This should be changed to enqueue a special request
- *      to the driver to change settings, and then wait on a sema for completion.
- *      The current scheme of polling is kludgy, though safe enough.
- */
-
-int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
-{
-        if (!capable(CAP_SYS_ADMIN))
-                return -EACCES;
-        if (setting->set)
-                return setting->set(drive, val);
-        if (!(setting->rw & SETTING_WRITE))
-                return -EPERM;
-        if (val < setting->min || val > setting->max)
-                return -EINVAL;
-        if (ide_spin_wait_hwgroup(drive))
-                return -EBUSY;
-        switch (setting->data_type) {
-                case TYPE_BYTE:
-                        *((u8 *) setting->data) = val;
-                        break;
-                case TYPE_SHORT:
-                        *((u16 *) setting->data) = val;
-                        break;
-                case TYPE_INT:
-                        *((u32 *) setting->data) = val;
-                        break;
-        }
-        spin_unlock_irq(&ide_lock);
-        return 0;
-}
-
-static int set_io_32bit(ide_drive_t *drive, int arg)
+int set_io_32bit(ide_drive_t *drive, int arg)
 {
         if (drive->no_io_32bit)
                 return -EPERM;
@@ -1104,7 +887,7 @@ static int set_ksettings(ide_drive_t *drive, int arg)
         return 0;
 }
 
-static int set_using_dma (ide_drive_t *drive, int arg)
+int set_using_dma(ide_drive_t *drive, int arg)
 {
 #ifdef CONFIG_BLK_DEV_IDEDMA
         ide_hwif_t *hwif = drive->hwif;
@@ -1152,7 +935,7 @@ out:
 #endif
 }
 
-static int set_pio_mode (ide_drive_t *drive, int arg)
+int set_pio_mode(ide_drive_t *drive, int arg)
 {
         struct request rq;
 
@@ -1186,48 +969,6 @@ static int set_unmaskirq(ide_drive_t *drive, int arg)
         return 0;
 }
 
-static int set_xfer_rate (ide_drive_t *drive, int arg)
-{
-        int err;
-
-        if (arg < 0 || arg > 70)
-                return -EINVAL;
-
-        err = ide_wait_cmd(drive,
-                        WIN_SETFEATURES, (u8) arg,
-                        SETFEATURES_XFER, 0, NULL);
-
-        if (!err && arg) {
-                ide_set_xfer_rate(drive, (u8) arg);
-                ide_driveid_update(drive);
-        }
-        return err;
-}
-
-/**
- *      ide_add_generic_settings        -       generic ide settings
- *      @drive: drive being configured
- *
- *      Add the generic parts of the system settings to the /proc files.
- *      The caller must not be holding the ide_setting_sem.
- */
-
-void ide_add_generic_settings (ide_drive_t *drive)
-{
-/*
- *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
- */
-        __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
-        __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
-        __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
-        __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
-        __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
-        __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
-        __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
-        __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
-        __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
-}
-
 /**
  *      system_bus_clock        -       clock guess
  *
@@ -1922,54 +1663,6 @@ static void __init probe_for_hwifs (void)
 #endif
 }
 
-void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
-{
-#ifdef CONFIG_IDE_PROC_FS
-        ide_add_proc_entries(drive->proc, driver->proc, drive);
-#endif
-}
-
-EXPORT_SYMBOL(ide_register_subdriver);
-
-/**
- *      ide_unregister_subdriver        -       disconnect drive from driver
- *      @drive: drive to unplug
- *      @driver: driver
- *
- *      Disconnect a drive from the driver it was attached to and then
- *      clean up the various proc files and other objects attached to it.
- *
- *      Takes ide_setting_sem and ide_lock.
- *      Caller must hold none of the locks.
- */
-
-void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
-{
-        unsigned long flags;
-
-#ifdef CONFIG_IDE_PROC_FS
-        ide_remove_proc_entries(drive->proc, driver->proc);
-#endif
-        down(&ide_setting_sem);
-        spin_lock_irqsave(&ide_lock, flags);
-        /*
-         * ide_setting_sem protects the settings list
-         * ide_lock protects the use of settings
-         *
-         * so we need to hold both, ide_settings_sem because we want to
-         * modify the settings list, and ide_lock because we cannot take
-         * a setting out that is being used.
-         *
-         * OTOH both ide_{read,write}_setting are only ever used under
-         * ide_setting_sem.
-         */
-        auto_remove_settings(drive);
-        spin_unlock_irqrestore(&ide_lock, flags);
-        up(&ide_setting_sem);
-}
-
-EXPORT_SYMBOL(ide_unregister_subdriver);
-
 /*
  * Probe module
  */
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 4388b8ab69a1..8263f752809d 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -721,6 +721,7 @@ static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *r
         return ide_stopped;
 }
 
+#ifdef CONFIG_IDE_PROC_FS
 static void idescsi_add_settings(ide_drive_t *drive)
 {
         idescsi_scsi_t *scsi = drive_to_idescsi(drive);
@@ -734,6 +735,9 @@ static void idescsi_add_settings(ide_drive_t *drive)
         ide_add_setting(drive,  "transform",    SETTING_RW,     TYPE_INT,       0,      3,      1,              1,              &scsi->transform,       NULL);
         ide_add_setting(drive,  "log",          SETTING_RW,     TYPE_INT,       0,      1,      1,              1,              &scsi->log,             NULL);
 }
+#else
+static inline void idescsi_add_settings(ide_drive_t *drive) { ; }
+#endif
 
 /*
  *      Driver initialization.
@@ -756,7 +760,7 @@ static void ide_scsi_remove(ide_drive_t *drive)
         struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
         struct gendisk *g = scsi->disk;
 
-        ide_unregister_subdriver(drive, scsi->driver);
+        ide_proc_unregister_driver(drive, scsi->driver);
 
         ide_unregister_region(g);
 
@@ -775,8 +779,6 @@ static ide_proc_entry_t idescsi_proc[] = {
         { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
         { NULL, 0, NULL, NULL }
 };
-#else
-# define idescsi_proc   NULL
 #endif
 
 static ide_driver_t idescsi_driver = {
@@ -790,11 +792,13 @@ static ide_driver_t idescsi_driver = {
         .version                = IDESCSI_VERSION,
         .media                  = ide_scsi,
         .supports_dsc_overlap   = 0,
-        .proc                   = idescsi_proc,
         .do_request             = idescsi_do_request,
         .end_request            = idescsi_end_request,
         .error                  = idescsi_atapi_error,
         .abort                  = idescsi_atapi_abort,
+#ifdef CONFIG_IDE_PROC_FS
+        .proc                   = idescsi_proc,
+#endif
 };
 
 static int idescsi_ide_open(struct inode *inode, struct file *filp)
@@ -1153,7 +1157,7 @@ static int ide_scsi_probe(ide_drive_t *drive)
         idescsi->host = host;
         idescsi->disk = g;
         g->private_data = &idescsi->driver;
-        ide_register_subdriver(drive, &idescsi_driver);
+        ide_proc_register_driver(drive, &idescsi_driver);
         err = 0;
         idescsi_setup(drive, idescsi);
         g->fops = &idescsi_ops;
@@ -1165,7 +1169,7 @@ static int ide_scsi_probe(ide_drive_t *drive)
         }
         /* fall through on error */
         ide_unregister_region(g);
-        ide_unregister_subdriver(drive, &idescsi_driver);
+        ide_proc_unregister_driver(drive, &idescsi_driver);
 
         put_disk(g);
 out_host_put:
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 591a0b55e31c..477b8c6be727 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -559,9 +559,10 @@ typedef struct ide_drive_s {
         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
         void            *driver_data;   /* extra driver data */
         struct hd_driveid       *id;    /* drive model identification info */
+#ifdef CONFIG_IDE_PROC_FS
         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
         struct ide_settings_s *settings;/* /proc/ide/ drive settings */
-
+#endif
         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 
         unsigned long sleep;            /* sleep until this time */
@@ -858,8 +859,15 @@ typedef struct hwgroup_s {
         unsigned char cmd_buf[4];
 } ide_hwgroup_t;
 
-/* structure attached to the request for IDE_TASK_CMDS */
+typedef struct ide_driver_s ide_driver_t;
+
+extern struct semaphore ide_setting_sem;
 
+int set_io_32bit(ide_drive_t *, int);
+int set_pio_mode(ide_drive_t *, int);
+int set_using_dma(ide_drive_t *, int);
+
+#ifdef CONFIG_IDE_PROC_FS
 /*
  * configurable drive settings
  */
@@ -887,12 +895,7 @@ typedef struct ide_settings_s {
         struct ide_settings_s   *next;
 } ide_settings_t;
 
-extern struct semaphore ide_setting_sem;
 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
-extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
-extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
-extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
-extern void ide_add_generic_settings(ide_drive_t *drive);
 
 /*
  * /proc/ide interface
@@ -904,15 +907,17 @@ typedef struct {
         write_proc_t    *write_proc;
 } ide_proc_entry_t;
 
-#ifdef CONFIG_IDE_PROC_FS
 extern struct proc_dir_entry *proc_ide_root;
 
 void proc_ide_create(void);
 void proc_ide_destroy(void);
 void create_proc_ide_interfaces(void);
 void destroy_proc_ide_interface(ide_hwif_t *);
-void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
-void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
+void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
+void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
+
+void ide_add_generic_settings(ide_drive_t *);
+
 read_proc_t proc_ide_read_capacity;
 read_proc_t proc_ide_read_geometry;
 
@@ -940,6 +945,9 @@ static inline void proc_ide_create(void) { ; }
 static inline void proc_ide_destroy(void) { ; }
 static inline void create_proc_ide_interfaces(void) { ; }
 static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; }
+static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
+static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
+static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 #endif
 
@@ -982,7 +990,7 @@ enum {
  * The gendriver.owner field should be set to the module owner of this driver.
  * The gendriver.name field should be set to the name of this driver
  */
-typedef struct ide_driver_s {
+struct ide_driver_s {
         const char                      *version;
         u8                              media;
         unsigned supports_dsc_overlap   : 1;
@@ -990,12 +998,14 @@ typedef struct ide_driver_s {
         int             (*end_request)(ide_drive_t *, int, int);
         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
         ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
-        ide_proc_entry_t        *proc;
         struct device_driver    gen_driver;
         int             (*probe)(ide_drive_t *);
         void            (*remove)(ide_drive_t *);
         void            (*shutdown)(ide_drive_t *);
-} ide_driver_t;
+#ifdef CONFIG_IDE_PROC_FS
+        ide_proc_entry_t        *proc;
+#endif
+};
 
 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
 
@@ -1205,9 +1215,6 @@ extern void default_hwif_iops(ide_hwif_t *);
 extern void default_hwif_mmiops(ide_hwif_t *);
 extern void default_hwif_transport(ide_hwif_t *);
 
-void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
-void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
-
 #define ON_BOARD                1
 #define NEVER_BOARD             0