firewire: mark some structs const

Instances of struct file_operations and struct fw_card_driver can be
qualified as "const".  Ditto with struct fw_descriptor.data, struct
fw_device_id, and predefined instances of struct fw_address_region,
at least in the current implementation.

Data qualified as const is placed into the .rodata section which won't
be mixed with dirty data.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/firewire/fw-card.c

@@ -257,7 +257,7 @@ flush_timer_callback(unsigned long data)
 }
 
 void
-fw_card_initialize(struct fw_card *card, struct fw_card_driver *driver,
+fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
 		   struct device *device)
 {
 	static int index;

drivers/firewire/fw-device-cdev.c

@@ -602,7 +602,7 @@ static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
 		return 0;
 }
 
-struct file_operations fw_device_ops = {
+const struct file_operations fw_device_ops = {
 	.owner		= THIS_MODULE,
 	.open		= fw_device_op_open,
 	.read		= fw_device_op_read,

drivers/firewire/fw-device.c

@@ -49,7 +49,7 @@ EXPORT_SYMBOL(fw_csr_iterator_next);
 
 static int is_fw_unit(struct device *dev);
 
-static int match_unit_directory(u32 * directory, struct fw_device_id *id)
+static int match_unit_directory(u32 * directory, const struct fw_device_id *id)
 {
 	struct fw_csr_iterator ci;
 	int key, value, match;

drivers/firewire/fw-device.h

@@ -113,7 +113,7 @@ struct fw_driver {
 	struct device_driver driver;
 	/* Called when the parent device sits through a bus reset. */
 	void (*update) (struct fw_unit *unit);
-	struct fw_device_id *id_table;
+	const struct fw_device_id *id_table;
 };
 
 static inline struct fw_driver *
@@ -122,6 +122,6 @@ fw_driver(struct device_driver *drv)
         return container_of(drv, struct fw_driver, driver);
 }
 
-extern struct file_operations fw_device_ops;
+extern const struct file_operations fw_device_ops;
 
 #endif /* __fw_device_h */

drivers/firewire/fw-ohci.c

@@ -1146,7 +1146,7 @@ ohci_queue_iso(struct fw_iso_context *base,
 	return 0;
 }
 
-static struct fw_card_driver ohci_driver = {
+static const struct fw_card_driver ohci_driver = {
 	.name			= ohci_driver_name,
 	.enable			= ohci_enable,
 	.update_phy_reg		= ohci_update_phy_reg,

drivers/firewire/fw-sbp2.c

@@ -681,7 +681,7 @@ static void sbp2_update(struct fw_unit *unit)
 #define SBP2_UNIT_SPEC_ID_ENTRY	0x0000609e
 #define SBP2_SW_VERSION_ENTRY	0x00010483
 
-static struct fw_device_id sbp2_id_table[] = {
+static const struct fw_device_id sbp2_id_table[] = {
 	{
 		.match_flags  = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION,
 		.specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,

drivers/firewire/fw-transaction.c

@@ -331,15 +331,15 @@ lookup_enclosing_address_handler(struct list_head *list,
 static DEFINE_SPINLOCK(address_handler_lock);
 static LIST_HEAD(address_handler_list);
 
-struct fw_address_region fw_low_memory_region =
+const struct fw_address_region fw_low_memory_region =
 	{ 0x000000000000ull, 0x000100000000ull };
-struct fw_address_region fw_high_memory_region =
+const struct fw_address_region fw_high_memory_region =
 	{ 0x000100000000ull, 0xffffe0000000ull };
-struct fw_address_region fw_private_region =
+const struct fw_address_region fw_private_region =
 	{ 0xffffe0000000ull, 0xfffff0000000ull };
-struct fw_address_region fw_csr_region =
+const struct fw_address_region fw_csr_region =
 	{ 0xfffff0000000ULL, 0xfffff0000800ull };
-struct fw_address_region fw_unit_space_region =
+const struct fw_address_region fw_unit_space_region =
 	{ 0xfffff0000900ull, 0x1000000000000ull };
 
 EXPORT_SYMBOL(fw_low_memory_region);
@@ -358,7 +358,7 @@ EXPORT_SYMBOL(fw_unit_space_region);
 
 int
 fw_core_add_address_handler(struct fw_address_handler *handler,
-			    struct fw_address_region *region)
+			    const struct fw_address_region *region)
 {
 	struct fw_address_handler *other;
 	unsigned long flags;
@@ -684,7 +684,7 @@ MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
 MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
 MODULE_LICENSE("GPL");
 
-static u32 vendor_textual_descriptor_data[] = {
+static const u32 vendor_textual_descriptor_data[] = {
 	/* textual descriptor leaf () */
 	0x00080000,
 	0x00000000,

drivers/firewire/fw-transaction.h

@@ -133,7 +133,7 @@ struct fw_descriptor {
 	struct list_head link;
 	size_t length;
 	u32 key;
-	u32 *data;
+	const u32 *data;
 };
 
 int fw_core_add_descriptor (struct fw_descriptor *desc);
@@ -218,14 +218,14 @@ struct fw_address_region {
 	u64 end;
 };
 
-extern struct fw_address_region fw_low_memory_region;
-extern struct fw_address_region fw_high_memory_region;
-extern struct fw_address_region fw_private_region;
-extern struct fw_address_region fw_csr_region;
-extern struct fw_address_region fw_unit_space_region;
+extern const struct fw_address_region fw_low_memory_region;
+extern const struct fw_address_region fw_high_memory_region;
+extern const struct fw_address_region fw_private_region;
+extern const struct fw_address_region fw_csr_region;
+extern const struct fw_address_region fw_unit_space_region;
 
 int fw_core_add_address_handler(struct fw_address_handler *handler,
-				struct fw_address_region *region);
+				const struct fw_address_region *region);
 void fw_core_remove_address_handler(struct fw_address_handler *handler);
 void fw_send_response(struct fw_card *card,
 		      struct fw_request *request, int rcode);
@@ -233,7 +233,7 @@ void fw_send_response(struct fw_card *card,
 extern struct bus_type fw_bus_type;
 
 struct fw_card {
-        struct fw_card_driver *driver;
+	const struct fw_card_driver *driver;
 	struct device *device;
 
         int node_id;
@@ -399,7 +399,7 @@ fw_node_event(struct fw_card *card, struct fw_node *node, int event);
 /* Do we need phy speed here also?  If we add more args, maybe we
    should go back to struct fw_card_info. */
 void
-fw_card_initialize(struct fw_card *card, struct fw_card_driver *driver,
+fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
 		   struct device *device);
 int
 fw_card_add(struct fw_card *card,