30 files changed, 138 insertions, 145 deletions

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 11abc7bf777e..46e58663dcb5 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -109,7 +109,7 @@ static struct proc_dir_entry *acpi_ac_dir;
 
 static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_ac *ac = (struct acpi_ac *)seq->private;
+        struct acpi_ac *ac = seq->private;
 
 
         if (!ac)
@@ -187,7 +187,7 @@ static int acpi_ac_remove_fs(struct acpi_device *device)
 
 static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_ac *ac = (struct acpi_ac *)data;
+        struct acpi_ac *ac = data;
         struct acpi_device *device = NULL;
 
 
@@ -269,7 +269,7 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        ac = (struct acpi_ac *)acpi_driver_data(device);
+        ac = acpi_driver_data(device);
 
         status = acpi_remove_notify_handler(device->handle,
                                             ACPI_ALL_NOTIFY, acpi_ac_notify);
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 98099de59b45..13687835c460 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -427,7 +427,7 @@ static int acpi_memory_device_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        mem_device = (struct acpi_memory_device *)acpi_driver_data(device);
+        mem_device = acpi_driver_data(device);
         kfree(mem_device);
 
         return 0;
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index e9ee4c52a5f6..f7db8ea7ac0a 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -1128,7 +1128,7 @@ static int asus_hotk_get_info(void)
         if (ACPI_FAILURE(status))
                 printk(KERN_WARNING "  Couldn't get the DSDT table header\n");
         else
-                asus_info = (struct acpi_table_header *)dsdt.pointer;
+                asus_info = dsdt.pointer;
 
         /* We have to write 0 on init this far for all ASUS models */
         if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
@@ -1150,7 +1150,7 @@ static int asus_hotk_get_info(void)
          * asus_model_match() and try something completely different.
          */
         if (buffer.pointer) {
-                model = (union acpi_object *)buffer.pointer;
+                model = buffer.pointer;
                 switch (model->type) {
                 case ACPI_TYPE_STRING:
                         string = model->string.pointer;
@@ -1245,8 +1245,7 @@ static int asus_hotk_add(struct acpi_device *device)
         printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
                ASUS_ACPI_VERSION);
 
-        hotk =
-            (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
+        hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
         if (!hotk)
                 return -ENOMEM;
         memset(hotk, 0, sizeof(struct asus_hotk));
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9810e2a55d0a..adb0d2725731 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -147,7 +147,7 @@ acpi_battery_get_info(struct acpi_battery *battery,
                 return -ENODEV;
         }
 
-        package = (union acpi_object *)buffer.pointer;
+        package = buffer.pointer;
 
         /* Extract Package Data */
 
@@ -177,7 +177,7 @@ acpi_battery_get_info(struct acpi_battery *battery,
         kfree(buffer.pointer);
 
         if (!result)
-                (*bif) = (struct acpi_battery_info *)data.pointer;
+                (*bif) = data.pointer;
 
         return result;
 }
@@ -207,7 +207,7 @@ acpi_battery_get_status(struct acpi_battery *battery,
                 return -ENODEV;
         }
 
-        package = (union acpi_object *)buffer.pointer;
+        package = buffer.pointer;
 
         /* Extract Package Data */
 
@@ -237,7 +237,7 @@ acpi_battery_get_status(struct acpi_battery *battery,
         kfree(buffer.pointer);
 
         if (!result)
-                (*bst) = (struct acpi_battery_status *)data.pointer;
+                (*bst) = data.pointer;
 
         return result;
 }
@@ -332,7 +332,7 @@ static struct proc_dir_entry *acpi_battery_dir;
 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
 {
         int result = 0;
-        struct acpi_battery *battery = (struct acpi_battery *)seq->private;
+        struct acpi_battery *battery = seq->private;
         struct acpi_battery_info *bif = NULL;
         char *units = "?";
 
@@ -416,7 +416,7 @@ static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
 {
         int result = 0;
-        struct acpi_battery *battery = (struct acpi_battery *)seq->private;
+        struct acpi_battery *battery = seq->private;
         struct acpi_battery_status *bst = NULL;
         char *units = "?";
 
@@ -492,7 +492,7 @@ static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
 {
-        struct acpi_battery *battery = (struct acpi_battery *)seq->private;
+        struct acpi_battery *battery = seq->private;
         char *units = "?";
 
 
@@ -529,8 +529,8 @@ acpi_battery_write_alarm(struct file *file,
 {
         int result = 0;
         char alarm_string[12] = { '\0' };
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_battery *battery = (struct acpi_battery *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_battery *battery = m->private;
 
 
         if (!battery || (count > sizeof(alarm_string) - 1))
@@ -656,7 +656,7 @@ static int acpi_battery_remove_fs(struct acpi_device *device)
 
 static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_battery *battery = (struct acpi_battery *)data;
+        struct acpi_battery *battery = data;
         struct acpi_device *device = NULL;
 
 
@@ -740,7 +740,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        battery = (struct acpi_battery *)acpi_driver_data(device);
+        battery = acpi_driver_data(device);
 
         status = acpi_remove_notify_handler(device->handle,
                                             ACPI_ALL_NOTIFY,
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 5ef885e82c78..fe914ebc4bbc 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -109,7 +109,7 @@ static struct proc_dir_entry *acpi_button_dir;
 
 static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_button *button = (struct acpi_button *)seq->private;
+        struct acpi_button *button = seq->private;
 
 
         if (!button || !button->device)
@@ -128,7 +128,7 @@ static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_button *button = (struct acpi_button *)seq->private;
+        struct acpi_button *button = seq->private;
         acpi_status status;
         unsigned long state;
 
@@ -253,7 +253,7 @@ static int acpi_button_remove_fs(struct acpi_device *device)
 
 static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_button *button = (struct acpi_button *)data;
+        struct acpi_button *button = data;
 
 
         if (!button || !button->device)
@@ -275,7 +275,7 @@ static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
 
 static acpi_status acpi_button_notify_fixed(void *data)
 {
-        struct acpi_button *button = (struct acpi_button *)data;
+        struct acpi_button *button = data;
 
 
         if (!button)
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 871aa520ece7..a15381789462 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -117,7 +117,7 @@ static int acpi_container_remove(struct acpi_device *device, int type)
         acpi_status status = AE_OK;
         struct acpi_container *pc = NULL;
 
-        pc = (struct acpi_container *)acpi_driver_data(device);
+        pc = acpi_driver_data(device);
         kfree(pc);
         return status;
 }
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 578b99b71d9c..3c3dee844dfc 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -524,7 +524,7 @@ EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device);
  */
 static void dock_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct dock_station *ds = (struct dock_station *)data;
+        struct dock_station *ds = data;
 
         switch (event) {
         case ACPI_NOTIFY_BUS_CHECK:
@@ -587,7 +587,7 @@ find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
         acpi_status status;
         acpi_handle tmp;
-        struct dock_station *ds = (struct dock_station *)context;
+        struct dock_station *ds = context;
         struct dock_dependent_device *dd;
 
         status = acpi_bus_get_ejd(handle, &tmp);
@@ -702,7 +702,7 @@ static int dock_remove(void)
 static acpi_status
 find_dock(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-        int *count = (int *)context;
+        int *count = context;
         acpi_status status = AE_OK;
 
         if (is_dock(handle)) {
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index e5d796362854..d560b5e8dd3f 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -716,7 +716,7 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt)
 }
 static void acpi_ec_gpe_intr_query(void *ec_cxt)
 {
-        union acpi_ec *ec = (union acpi_ec *)ec_cxt;
+        union acpi_ec *ec = ec_cxt;
         u32 value;
         int result = -ENODATA;
         static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
@@ -752,7 +752,7 @@ static u32 acpi_ec_gpe_handler(void *data)
 static u32 acpi_ec_gpe_poll_handler(void *data)
 {
         acpi_status status = AE_OK;
-        union acpi_ec *ec = (union acpi_ec *)data;
+        union acpi_ec *ec = data;
 
         if (!ec)
                 return ACPI_INTERRUPT_NOT_HANDLED;
@@ -770,7 +770,7 @@ static u32 acpi_ec_gpe_intr_handler(void *data)
 {
         acpi_status status = AE_OK;
         u32 value;
-        union acpi_ec *ec = (union acpi_ec *)data;
+        union acpi_ec *ec = data;
 
         if (!ec)
                 return ACPI_INTERRUPT_NOT_HANDLED;
@@ -848,7 +848,7 @@ acpi_ec_space_handler(u32 function,
                 return AE_BAD_PARAMETER;
         }
 
-        ec = (union acpi_ec *)handler_context;
+        ec = handler_context;
 
       next_byte:
         switch (function) {
@@ -905,7 +905,7 @@ static struct proc_dir_entry *acpi_ec_dir;
 
 static int acpi_ec_read_info(struct seq_file *seq, void *offset)
 {
-        union acpi_ec *ec = (union acpi_ec *)seq->private;
+        union acpi_ec *ec = seq->private;
 
 
         if (!ec)
@@ -1136,7 +1136,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
 static acpi_status
 acpi_ec_io_ports(struct acpi_resource *resource, void *context)
 {
-        union acpi_ec *ec = (union acpi_ec *)context;
+        union acpi_ec *ec = context;
         struct acpi_generic_address *addr;
 
         if (resource->type != ACPI_RESOURCE_TYPE_IO) {
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 045c89477e59..c413e69fea8e 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -99,8 +99,8 @@ acpi_fan_write_state(struct file *file, const char __user * buffer,
                      size_t count, loff_t * ppos)
 {
         int result = 0;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_fan *fan = (struct acpi_fan *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_fan *fan = m->private;
         char state_string[12] = { '\0' };
 
 
@@ -229,7 +229,7 @@ static int acpi_fan_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        fan = (struct acpi_fan *)acpi_driver_data(device);
+        fan = acpi_driver_data(device);
 
         acpi_fan_remove_fs(device);
 
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 10f160dc75b1..ba5686fa4750 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -96,7 +96,7 @@ struct acpi_find_pci_root {
 static acpi_status
 do_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
 {
-        unsigned long *busnr = (unsigned long *)data;
+        unsigned long *busnr = data;
         struct acpi_resource_address64 address;
 
         if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 &&
@@ -217,7 +217,7 @@ do_acpi_find_child(acpi_handle handle, u32 lvl, void *context, void **rv)
         acpi_status status;
         struct acpi_device_info *info;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-        struct acpi_find_child *find = (struct acpi_find_child *)context;
+        struct acpi_find_child *find = context;
 
         status = acpi_get_object_info(handle, &buffer);
         if (ACPI_SUCCESS(status)) {
diff --git a/drivers/acpi/hotkey.c b/drivers/acpi/hotkey.c
index 1ba2db671865..8edfb92f7ede 100644
--- a/drivers/acpi/hotkey.c
+++ b/drivers/acpi/hotkey.c
@@ -265,8 +265,7 @@ static char *format_result(union acpi_object *object)
 
 static int hotkey_polling_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_polling_hotkey *poll_hotkey =
-            (struct acpi_polling_hotkey *)seq->private;
+        struct acpi_polling_hotkey *poll_hotkey = seq->private;
         char *buf;
 
 
@@ -577,7 +576,7 @@ init_poll_hotkey_device(union acpi_hotkey *key, char **config_entry,
         if (ACPI_FAILURE(status))
                 goto do_fail_zero;
         key->poll_hotkey.poll_result =
-            (union acpi_object *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
+            kmalloc(sizeof(union acpi_object), GFP_KERNEL);
         if (!key->poll_hotkey.poll_result)
                 goto do_fail_zero;
         return AE_OK;
diff --git a/drivers/acpi/i2c_ec.c b/drivers/acpi/i2c_ec.c
index 6342e612c203..82e3e64483fb 100644
--- a/drivers/acpi/i2c_ec.c
+++ b/drivers/acpi/i2c_ec.c
@@ -393,7 +393,7 @@ static void __exit acpi_ec_hc_exit(void)
 
 struct acpi_ec_hc *acpi_get_ec_hc(struct acpi_device *device)
 {
-        return ((struct acpi_ec_hc *)acpi_driver_data(device->parent));
+        return acpi_driver_data(device->parent);
 }
 
 EXPORT_SYMBOL(acpi_get_ec_hc);
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index 15fc12482ba0..6fbb42048890 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -1721,7 +1721,7 @@ static struct ibm_struct ibms[] = {
 static int dispatch_read(char *page, char **start, off_t off, int count,
                          int *eof, void *data)
 {
-        struct ibm_struct *ibm = (struct ibm_struct *)data;
+        struct ibm_struct *ibm = data;
         int len;
 
         if (!ibm || !ibm->read)
@@ -1746,7 +1746,7 @@ static int dispatch_read(char *page, char **start, off_t off, int count,
 static int dispatch_write(struct file *file, const char __user * userbuf,
                           unsigned long count, void *data)
 {
-        struct ibm_struct *ibm = (struct ibm_struct *)data;
+        struct ibm_struct *ibm = data;
         char *kernbuf;
         int ret;
 
@@ -1775,7 +1775,7 @@ static int dispatch_write(struct file *file, const char __user * userbuf,
 
 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct ibm_struct *ibm = (struct ibm_struct *)data;
+        struct ibm_struct *ibm = data;
 
         if (!ibm || !ibm->notify)
                 return;
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index e5e448edca41..bd96a7045925 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -248,7 +248,7 @@ int acpi_get_pxm(acpi_handle h)
                 handle = phandle;
                 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
                 if (ACPI_SUCCESS(status))
-                        return (int)pxm;
+                        return pxm;
                 status = acpi_get_parent(handle, &phandle);
         } while (ACPI_SUCCESS(status));
         return -1;
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 068fe4f100b0..2ed2d701f6e1 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -569,7 +569,7 @@ static void acpi_os_execute_deferred(void *context)
         struct acpi_os_dpc *dpc = NULL;
 
 
-        dpc = (struct acpi_os_dpc *)context;
+        dpc = context;
         if (!dpc) {
                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
                 return;
@@ -1060,7 +1060,7 @@ acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
 
 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
 {
-        (void)kmem_cache_shrink(cache);
+        kmem_cache_shrink(cache);
         return (AE_OK);
 }
 
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index 1e2ae6e7a7e4..70b440f3f262 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -281,7 +281,7 @@ int acpi_pci_unbind(struct acpi_device *device)
         if (!device || !device->parent)
                 return -EINVAL;
 
-        pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+        pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
         if (!pathname)
                 return -ENOMEM;
         memset(pathname, 0, ACPI_PATHNAME_MAX);
@@ -332,7 +332,7 @@ acpi_pci_bind_root(struct acpi_device *device,
         struct acpi_buffer buffer = { 0, NULL };
 
 
-        pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+        pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
         if (!pathname)
                 return -ENOMEM;
         memset(pathname, 0, ACPI_PATHNAME_MAX);
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index feda0341f5a7..226892eaf987 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -161,7 +161,7 @@ int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
         static int first_time = 1;
 
 
-        pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+        pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
         if (!pathname)
                 return -ENOMEM;
         memset(pathname, 0, ACPI_PATHNAME_MAX);
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 7f3e7e77e794..6718198bfae7 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -103,7 +103,7 @@ DEFINE_MUTEX(acpi_link_lock);
 static acpi_status
 acpi_pci_link_check_possible(struct acpi_resource *resource, void *context)
 {
-        struct acpi_pci_link *link = (struct acpi_pci_link *)context;
+        struct acpi_pci_link *link = context;
         u32 i = 0;
 
 
@@ -613,7 +613,7 @@ acpi_pci_link_allocate_irq(acpi_handle handle,
                 return -1;
         }
 
-        link = (struct acpi_pci_link *)acpi_driver_data(device);
+        link = acpi_driver_data(device);
         if (!link) {
                 printk(KERN_ERR PREFIX "Invalid link context\n");
                 return -1;
@@ -668,7 +668,7 @@ int acpi_pci_link_free_irq(acpi_handle handle)
                 return -1;
         }
 
-        link = (struct acpi_pci_link *)acpi_driver_data(device);
+        link = acpi_driver_data(device);
         if (!link) {
                 printk(KERN_ERR PREFIX "Invalid link context\n");
                 return -1;
@@ -808,7 +808,7 @@ static int acpi_pci_link_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        link = (struct acpi_pci_link *)acpi_driver_data(device);
+        link = acpi_driver_data(device);
 
         mutex_lock(&acpi_link_lock);
         list_del(&link->node);
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 0984a1ee24ed..03e03741c140 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -119,7 +119,7 @@ EXPORT_SYMBOL(acpi_pci_unregister_driver);
 static acpi_status
 get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
 {
-        int *busnr = (int *)data;
+        int *busnr = data;
         struct acpi_resource_address64 address;
 
         if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 &&
@@ -331,7 +331,7 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        root = (struct acpi_pci_root *)acpi_driver_data(device);
+        root = acpi_driver_data(device);
 
         kfree(root);
 
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index fec225d1b6b7..e9dab54bd541 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -108,7 +108,7 @@ acpi_power_get_context(acpi_handle handle,
                 return result;
         }
 
-        *resource = (struct acpi_power_resource *)acpi_driver_data(device);
+        *resource = acpi_driver_data(device);
         if (!resource)
                 return -ENODEV;
 
@@ -445,7 +445,7 @@ static int acpi_power_seq_show(struct seq_file *seq, void *offset)
         struct acpi_power_resource *resource = NULL;
 
 
-        resource = (struct acpi_power_resource *)seq->private;
+        resource = seq->private;
 
         if (!resource)
                 goto end;
@@ -593,7 +593,7 @@ static int acpi_power_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        resource = (struct acpi_power_resource *)acpi_driver_data(device);
+        resource = acpi_driver_data(device);
 
         acpi_power_remove_fs(device);
 
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index b13d64415b7a..44c624bd40cb 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -277,7 +277,7 @@ static struct proc_dir_entry *acpi_processor_dir = NULL;
 
 static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_processor *pr = (struct acpi_processor *)seq->private;
+        struct acpi_processor *pr = seq->private;
 
 
         if (!pr)
@@ -542,12 +542,12 @@ static int acpi_processor_start(struct acpi_device *device)
          * Don't trust it blindly
          */
         if (processor_device_array[pr->id] != NULL &&
-            processor_device_array[pr->id] != (void *)device) {
+            processor_device_array[pr->id] != device) {
                 printk(KERN_WARNING "BIOS reported wrong ACPI id"
                         "for the processor\n");
                 return -ENODEV;
         }
-        processor_device_array[pr->id] = (void *)device;
+        processor_device_array[pr->id] = device;
 
         processors[pr->id] = pr;
 
@@ -578,7 +578,7 @@ static int acpi_processor_start(struct acpi_device *device)
 
 static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_processor *pr = (struct acpi_processor *)data;
+        struct acpi_processor *pr = data;
         struct acpi_device *device = NULL;
 
 
@@ -637,7 +637,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        pr = (struct acpi_processor *)acpi_driver_data(device);
+        pr = acpi_driver_data(device);
 
         if (pr->id >= NR_CPUS) {
                 kfree(pr);
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 0a395fca843b..4504684671f6 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -671,7 +671,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
                 return -ENODEV;
         }
 
-        cst = (union acpi_object *)buffer.pointer;
+        cst = buffer.pointer;
 
         /* There must be at least 2 elements */
         if (!cst || (cst->type != ACPI_TYPE_PACKAGE) || cst->package.count < 2) {
@@ -700,14 +700,14 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
 
                 memset(&cx, 0, sizeof(cx));
 
-                element = (union acpi_object *)&(cst->package.elements[i]);
+                element = &(cst->package.elements[i]);
                 if (element->type != ACPI_TYPE_PACKAGE)
                         continue;
 
                 if (element->package.count != 4)
                         continue;
 
-                obj = (union acpi_object *)&(element->package.elements[0]);
+                obj = &(element->package.elements[0]);
 
                 if (obj->type != ACPI_TYPE_BUFFER)
                         continue;
@@ -722,7 +722,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
                     0 : reg->address;
 
                 /* There should be an easy way to extract an integer... */
-                obj = (union acpi_object *)&(element->package.elements[1]);
+                obj = &(element->package.elements[1]);
                 if (obj->type != ACPI_TYPE_INTEGER)
                         continue;
 
@@ -735,13 +735,13 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
                 if ((cx.type < ACPI_STATE_C2) || (cx.type > ACPI_STATE_C3))
                         continue;
 
-                obj = (union acpi_object *)&(element->package.elements[2]);
+                obj = &(element->package.elements[2]);
                 if (obj->type != ACPI_TYPE_INTEGER)
                         continue;
 
                 cx.latency = obj->integer.value;
 
-                obj = (union acpi_object *)&(element->package.elements[3]);
+                obj = &(element->package.elements[3]);
                 if (obj->type != ACPI_TYPE_INTEGER)
                         continue;
 
@@ -1004,7 +1004,7 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr)
 
 static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_processor *pr = (struct acpi_processor *)seq->private;
+        struct acpi_processor *pr = seq->private;
         unsigned int i;
 
 
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 7ba5e49ab302..39fdbcc37d43 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -238,7 +238,7 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr)
                 return -ENODEV;
         }
 
-        pss = (union acpi_object *)buffer.pointer;
+        pss = buffer.pointer;
         if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) {
                 printk(KERN_ERR PREFIX "Invalid _PSS data\n");
                 result = -EFAULT;
@@ -412,7 +412,7 @@ static struct file_operations acpi_processor_perf_fops = {
 
 static int acpi_processor_perf_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_processor *pr = (struct acpi_processor *)seq->private;
+        struct acpi_processor *pr = seq->private;
         int i;
 
 
@@ -453,8 +453,8 @@ acpi_processor_write_performance(struct file *file,
                                  size_t count, loff_t * data)
 {
         int result = 0;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_processor *pr = (struct acpi_processor *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_processor *pr = m->private;
         struct acpi_processor_performance *perf;
         char state_string[12] = { '\0' };
         unsigned int new_state = 0;
@@ -553,7 +553,7 @@ static int acpi_processor_get_psd(struct acpi_processor	*pr)
                 return -ENODEV;
         }
 
-        psd = (union acpi_object *) buffer.pointer;
+        psd = buffer.pointer;
         if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
                 result = -EFAULT;
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index ef5e0f6efdba..40fecd67ad83 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -208,7 +208,7 @@ int acpi_processor_set_thermal_limit(acpi_handle handle, int type)
         if (result)
                 return result;
 
-        pr = (struct acpi_processor *)acpi_driver_data(device);
+        pr = acpi_driver_data(device);
         if (!pr)
                 return -ENODEV;
 
@@ -348,8 +348,8 @@ static ssize_t acpi_processor_write_limit(struct file * file,
                                           size_t count, loff_t * data)
 {
         int result = 0;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_processor *pr = (struct acpi_processor *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_processor *pr = m->private;
         char limit_string[25] = { '\0' };
         int px = 0;
         int tx = 0;
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index d044ec519db0..0ec7dcde0063 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -259,7 +259,7 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
 static int acpi_processor_throttling_seq_show(struct seq_file *seq,
                                               void *offset)
 {
-        struct acpi_processor *pr = (struct acpi_processor *)seq->private;
+        struct acpi_processor *pr = seq->private;
         int i = 0;
         int result = 0;
 
@@ -307,8 +307,8 @@ static ssize_t acpi_processor_write_throttling(struct file * file,
                                                size_t count, loff_t * data)
 {
         int result = 0;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_processor *pr = (struct acpi_processor *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_processor *pr = m->private;
         char state_string[12] = { '\0' };
 
 
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 62bef0b3b614..c6a819adcc9e 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -923,7 +923,7 @@ static struct proc_dir_entry *acpi_battery_dir = NULL;
 
 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
 {
-        struct acpi_battery *battery = (struct acpi_battery *)seq->private;
+        struct acpi_battery *battery = seq->private;
         int cscale;
         int result = 0;
 
@@ -1076,7 +1076,7 @@ static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
 {
-        struct acpi_battery *battery = (struct acpi_battery *)seq->private;
+        struct acpi_battery *battery = seq->private;
         int result = 0;
         int cscale;
 
@@ -1125,8 +1125,8 @@ static ssize_t
 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
                          size_t count, loff_t * ppos)
 {
-        struct seq_file *seq = (struct seq_file *)file->private_data;
-        struct acpi_battery *battery = (struct acpi_battery *)seq->private;
+        struct seq_file *seq = file->private_data;
+        struct acpi_battery *battery = seq->private;
         char alarm_string[12] = { '\0' };
         int result, old_alarm, new_alarm;
 
@@ -1160,14 +1160,14 @@ acpi_battery_write_alarm(struct file *file, const char __user * buffer,
         if (result) {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "acpi_battery_set_alarm() failed\n"));
-                (void)acpi_battery_set_alarm(battery, old_alarm);
+                acpi_battery_set_alarm(battery, old_alarm);
                 goto end;
         }
         result = acpi_battery_get_alarm(battery);
         if (result) {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "acpi_battery_get_alarm() failed\n"));
-                (void)acpi_battery_set_alarm(battery, old_alarm);
+                acpi_battery_set_alarm(battery, old_alarm);
                 goto end;
         }
 
@@ -1217,7 +1217,7 @@ static struct proc_dir_entry *acpi_ac_dir = NULL;
 
 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
 {
-        struct acpi_sbs *sbs = (struct acpi_sbs *)seq->private;
+        struct acpi_sbs *sbs = seq->private;
         int result;
 
         if (sbs->zombie) {
@@ -1302,7 +1302,7 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id)
                 battery->init_state = 1;
         }
 
-        (void)sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
+        sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
 
         result = acpi_sbs_generic_add_fs(&battery->battery_entry,
                                          acpi_battery_dir,
@@ -1485,7 +1485,7 @@ static int acpi_sbs_update_run(struct acpi_sbs *sbs, int data_type)
                 }
 
                 if (old_battery_present != new_battery_present) {
-                        (void)sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
+                        sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
                         result = acpi_sbs_generate_event(sbs->device,
                                                          ACPI_SBS_BATTERY_NOTIFY_STATUS,
                                                          new_battery_present,
@@ -1498,7 +1498,7 @@ static int acpi_sbs_update_run(struct acpi_sbs *sbs, int data_type)
                         }
                 }
                 if (old_remaining_capacity != battery->state.remaining_capacity) {
-                        (void)sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
+                        sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
                         result = acpi_sbs_generate_event(sbs->device,
                                                          ACPI_SBS_BATTERY_NOTIFY_STATUS,
                                                          new_battery_present,
@@ -1659,7 +1659,7 @@ static int acpi_sbs_add(struct acpi_device *device)
         init_timer(&sbs->update_timer);
         if (update_mode == QUEUE_UPDATE_MODE) {
                 status = acpi_os_execute(OSL_GPE_HANDLER,
-                                         acpi_sbs_update_queue, (void *)sbs);
+                                         acpi_sbs_update_queue, sbs);
                 if (status != AE_OK) {
                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                           "acpi_os_execute() failed\n"));
@@ -1685,7 +1685,7 @@ static int acpi_sbs_add(struct acpi_device *device)
 
 int acpi_sbs_remove(struct acpi_device *device, int type)
 {
-        struct acpi_sbs *sbs = (struct acpi_sbs *)acpi_driver_data(device);
+        struct acpi_sbs *sbs = acpi_driver_data(device);
         int id;
 
         if (!device || !sbs) {
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index bfb3bfcf9e91..ffa30c9fccbf 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -228,7 +228,7 @@ void acpi_table_print_madt_entry(acpi_table_entry_header * header)
 static int
 acpi_table_compute_checksum(void *table_pointer, unsigned long length)
 {
-        u8 *p = (u8 *) table_pointer;
+        u8 *p = table_pointer;
         unsigned long remains = length;
         unsigned long sum = 0;
 
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5753d06b7860..4d75085ca2d2 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -663,7 +663,7 @@ static void acpi_thermal_run(unsigned long data)
 static void acpi_thermal_check(void *data)
 {
         int result = 0;
-        struct acpi_thermal *tz = (struct acpi_thermal *)data;
+        struct acpi_thermal *tz = data;
         unsigned long sleep_time = 0;
         int i = 0;
         struct acpi_thermal_state state;
@@ -778,7 +778,7 @@ static struct proc_dir_entry *acpi_thermal_dir;
 
 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+        struct acpi_thermal *tz = seq->private;
 
 
         if (!tz)
@@ -813,7 +813,7 @@ static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
 {
         int result = 0;
-        struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+        struct acpi_thermal *tz = seq->private;
 
 
         if (!tz)
@@ -837,7 +837,7 @@ static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+        struct acpi_thermal *tz = seq->private;
         int i = 0;
         int j = 0;
 
@@ -893,8 +893,8 @@ acpi_thermal_write_trip_points(struct file *file,
                                const char __user * buffer,
                                size_t count, loff_t * ppos)
 {
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_thermal *tz = m->private;
 
         char *limit_string;
         int num, critical, hot, passive;
@@ -953,7 +953,7 @@ acpi_thermal_write_trip_points(struct file *file,
 
 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+        struct acpi_thermal *tz = seq->private;
 
 
         if (!tz)
@@ -984,8 +984,8 @@ acpi_thermal_write_cooling_mode(struct file *file,
                                 const char __user * buffer,
                                 size_t count, loff_t * ppos)
 {
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_thermal *tz = m->private;
         int result = 0;
         char mode_string[12] = { '\0' };
 
@@ -1014,7 +1014,7 @@ acpi_thermal_write_cooling_mode(struct file *file,
 
 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
+        struct acpi_thermal *tz = seq->private;
 
 
         if (!tz)
@@ -1043,8 +1043,8 @@ acpi_thermal_write_polling(struct file *file,
                            const char __user * buffer,
                            size_t count, loff_t * ppos)
 {
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_thermal *tz = m->private;
         int result = 0;
         char polling_string[12] = { '\0' };
         int seconds = 0;
@@ -1170,7 +1170,7 @@ static int acpi_thermal_remove_fs(struct acpi_device *device)
 
 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_thermal *tz = (struct acpi_thermal *)data;
+        struct acpi_thermal *tz = data;
         struct acpi_device *device = NULL;
 
 
@@ -1324,7 +1324,7 @@ static int acpi_thermal_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        tz = (struct acpi_thermal *)acpi_driver_data(device);
+        tz = acpi_driver_data(device);
 
         /* avoid timer adding new defer task */
         tz->zombie = 1;
@@ -1364,7 +1364,7 @@ static int acpi_thermal_resume(struct acpi_device *device, int state)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        tz = (struct acpi_thermal *)acpi_driver_data(device);
+        tz = acpi_driver_data(device);
 
         acpi_thermal_get_temperature(tz);
 
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index d0d84c43a9d4..91fed70a65a6 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -83,7 +83,7 @@ acpi_extract_package(union acpi_object *package,
                 return AE_BAD_DATA;
         }
 
-        format_string = (char *)format->pointer;
+        format_string = format->pointer;
 
         /*
          * Calculate size_required.
@@ -361,7 +361,7 @@ acpi_evaluate_reference(acpi_handle handle,
         if (ACPI_FAILURE(status))
                 goto end;
 
-        package = (union acpi_object *)buffer.pointer;
+        package = buffer.pointer;
 
         if ((buffer.length == 0) || !package) {
                 printk(KERN_ERR PREFIX "No return object (len %X ptr %p)\n",
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 56666a982476..53a9eb015d6b 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -386,7 +386,7 @@ acpi_video_device_EDID(struct acpi_video_device *device,
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
-        obj = (union acpi_object *)buffer.pointer;
+        obj = buffer.pointer;
 
         if (obj && obj->type == ACPI_TYPE_BUFFER)
                 *edid = obj;
@@ -654,8 +654,7 @@ static struct proc_dir_entry *acpi_video_dir;
 
 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_device *dev =
-            (struct acpi_video_device *)seq->private;
+        struct acpi_video_device *dev = seq->private;
 
 
         if (!dev)
@@ -688,8 +687,7 @@ acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
 {
         int status;
-        struct acpi_video_device *dev =
-            (struct acpi_video_device *)seq->private;
+        struct acpi_video_device *dev = seq->private;
         unsigned long state;
 
 
@@ -727,8 +725,8 @@ acpi_video_device_write_state(struct file *file,
                               size_t count, loff_t * data)
 {
         int status;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_video_device *dev = m->private;
         char str[12] = { 0 };
         u32 state = 0;
 
@@ -754,8 +752,7 @@ acpi_video_device_write_state(struct file *file,
 static int
 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_device *dev =
-            (struct acpi_video_device *)seq->private;
+        struct acpi_video_device *dev = seq->private;
         int i;
 
 
@@ -784,8 +781,8 @@ acpi_video_device_write_brightness(struct file *file,
                                    const char __user * buffer,
                                    size_t count, loff_t * data)
 {
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_video_device *dev = m->private;
         char str[4] = { 0 };
         unsigned int level = 0;
         int i;
@@ -817,8 +814,7 @@ acpi_video_device_write_brightness(struct file *file,
 
 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_device *dev =
-            (struct acpi_video_device *)seq->private;
+        struct acpi_video_device *dev = seq->private;
         int status;
         int i;
         union acpi_object *edid = NULL;
@@ -866,7 +862,7 @@ static int acpi_video_device_add_fs(struct acpi_device *device)
         if (!device)
                 return -ENODEV;
 
-        vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
+        vid_dev = acpi_driver_data(device);
         if (!vid_dev)
                 return -ENODEV;
 
@@ -931,7 +927,7 @@ static int acpi_video_device_remove_fs(struct acpi_device *device)
 {
         struct acpi_video_device *vid_dev;
 
-        vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
+        vid_dev = acpi_driver_data(device);
         if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
                 return -ENODEV;
 
@@ -950,7 +946,7 @@ static int acpi_video_device_remove_fs(struct acpi_device *device)
 /* video bus */
 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+        struct acpi_video_bus *video = seq->private;
 
 
         if (!video)
@@ -975,7 +971,7 @@ static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+        struct acpi_video_bus *video = seq->private;
 
 
         if (!video)
@@ -995,7 +991,7 @@ static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+        struct acpi_video_bus *video = seq->private;
         unsigned long options;
         int status;
 
@@ -1033,7 +1029,7 @@ acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
 
 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+        struct acpi_video_bus *video = seq->private;
         int status;
         unsigned long id;
 
@@ -1054,7 +1050,7 @@ static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
 
 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
 {
-        struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+        struct acpi_video_bus *video = seq->private;
 
 
         seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
@@ -1079,8 +1075,8 @@ acpi_video_bus_write_POST(struct file *file,
                           size_t count, loff_t * data)
 {
         int status;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_video_bus *video = m->private;
         char str[12] = { 0 };
         unsigned long opt, options;
 
@@ -1119,8 +1115,8 @@ acpi_video_bus_write_DOS(struct file *file,
                          size_t count, loff_t * data)
 {
         int status;
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
+        struct seq_file *m = file->private_data;
+        struct acpi_video_bus *video = m->private;
         char str[12] = { 0 };
         unsigned long opt;
 
@@ -1150,7 +1146,7 @@ static int acpi_video_bus_add_fs(struct acpi_device *device)
         struct acpi_video_bus *video;
 
 
-        video = (struct acpi_video_bus *)acpi_driver_data(device);
+        video = acpi_driver_data(device);
 
         if (!acpi_device_dir(device)) {
                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
@@ -1226,7 +1222,7 @@ static int acpi_video_bus_remove_fs(struct acpi_device *device)
         struct acpi_video_bus *video;
 
 
-        video = (struct acpi_video_bus *)acpi_driver_data(device);
+        video = acpi_driver_data(device);
 
         if (acpi_device_dir(device)) {
                 remove_proc_entry("info", acpi_device_dir(device));
@@ -1403,7 +1399,7 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video)
                 return status;
         }
 
-        dod = (union acpi_object *)buffer.pointer;
+        dod = buffer.pointer;
         if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
                 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
                 status = -EFAULT;
@@ -1426,7 +1422,7 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video)
 
         count = 0;
         for (i = 0; i < dod->package.count; i++) {
-                obj = (union acpi_object *)&dod->package.elements[i];
+                obj = &dod->package.elements[i];
 
                 if (obj->type != ACPI_TYPE_INTEGER) {
                         printk(KERN_ERR PREFIX "Invalid _DOD data\n");
@@ -1612,7 +1608,7 @@ static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
 
 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_video_bus *video = (struct acpi_video_bus *)data;
+        struct acpi_video_bus *video = data;
         struct acpi_device *device = NULL;
 
         printk("video bus notify\n");
@@ -1654,8 +1650,7 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
 
 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
 {
-        struct acpi_video_device *video_device =
-            (struct acpi_video_device *)data;
+        struct acpi_video_device *video_device = data;
         struct acpi_device *device = NULL;
 
 
@@ -1757,7 +1752,7 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
         if (!device || !acpi_driver_data(device))
                 return -EINVAL;
 
-        video = (struct acpi_video_bus *)acpi_driver_data(device);
+        video = acpi_driver_data(device);
 
         acpi_video_bus_stop_devices(video);