ipmi: make ipmi_usr_hndl const

It's only function pointers.
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_devintf.c

@@ -108,7 +108,7 @@ static int ipmi_fasync(int fd, struct file *file, int on)
 	return (result);
 }
 
-static struct ipmi_user_hndl ipmi_hndlrs =
+static const struct ipmi_user_hndl ipmi_hndlrs =
 {
 	.ipmi_recv_hndl	= file_receive_handler,
 };

drivers/char/ipmi/ipmi_msghandler.c

@@ -102,7 +102,7 @@ struct ipmi_user {
 	struct kref refcount;
 
 	/* The upper layer that handles receive messages. */
-	struct ipmi_user_hndl *handler;
+	const struct ipmi_user_hndl *handler;
 	void             *handler_data;
 
 	/* The interface this user is bound to. */
@@ -919,7 +919,7 @@ static int intf_err_seq(ipmi_smi_t   intf,
 
 
 int ipmi_create_user(unsigned int          if_num,
-		     struct ipmi_user_hndl *handler,
+		     const struct ipmi_user_hndl *handler,
 		     void                  *handler_data,
 		     ipmi_user_t           *user)
 {

drivers/char/ipmi/ipmi_watchdog.c

@@ -985,7 +985,7 @@ static void ipmi_wdog_pretimeout_handler(void *handler_data)
 	pretimeout_since_last_heartbeat = 1;
 }
 
-static struct ipmi_user_hndl ipmi_hndlrs = {
+static const struct ipmi_user_hndl ipmi_hndlrs = {
 	.ipmi_recv_hndl           = ipmi_wdog_msg_handler,
 	.ipmi_watchdog_pretimeout = ipmi_wdog_pretimeout_handler
 };

include/linux/ipmi.h

@@ -100,7 +100,7 @@ struct ipmi_user_hndl {
 
 /* Create a new user of the IPMI layer on the given interface number. */
 int ipmi_create_user(unsigned int          if_num,
-		     struct ipmi_user_hndl *handler,
+		     const struct ipmi_user_hndl *handler,
 		     void                  *handler_data,
 		     ipmi_user_t           *user);