Driver core: Constify struct sysfs_ops in struct kobj_type

Constify struct sysfs_ops.

This is part of the ops structure constification
effort started by Arjan van de Ven et al.

Benefits of this constification:

 * prevents modification of data that is shared
   (referenced) by many other structure instances
   at runtime

 * detects/prevents accidental (but not intentional)
   modification attempts on archs that enforce
   read-only kernel data at runtime

 * potentially better optimized code as the compiler
   can assume that the const data cannot be changed

 * the compiler/linker move const data into .rodata
   and therefore exclude them from false sharing

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: David Teigland <teigland@redhat.com>
Acked-by: Matt Domsch <Matt_Domsch@dell.com>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Hans J. Koch <hjk@linutronix.de>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 2 insertions, 2 deletions

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 1cf2cef78584..fef0384e3c0b 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -423,7 +423,7 @@ extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 
 #ifdef CONFIG_SYSFS
 /* br_sysfs_if.c */
-extern struct sysfs_ops brport_sysfs_ops;
+extern const struct sysfs_ops brport_sysfs_ops;
 extern int br_sysfs_addif(struct net_bridge_port *p);
 
 /* br_sysfs_br.c */
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 696596cd3384..0b9916489d6b 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -238,7 +238,7 @@ static ssize_t brport_store(struct kobject * kobj,
         return ret;
 }
 
-struct sysfs_ops brport_sysfs_ops = {
+const struct sysfs_ops brport_sysfs_ops = {
         .show = brport_show,
         .store = brport_store,
 };