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>

1 files changed, 9 insertions, 9 deletions

diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 292add509102..2f849c813a4c 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/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,