driver core: class: mark the struct class for sysfs callbacks as constant

struct class should never be modified in a sysfs callback as there is
nothing in the structure to modify, and frankly, the structure is almost
never used in a sysfs callback, so mark it as constant to allow struct
class to be moved to read-only memory.

While we are touching all class sysfs callbacks also mark the attribute
as constant as it can not be modified.  The bonding code still uses this
structure so it can not be removed from the function callbacks.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Russ Weight <russell.h.weight@intel.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steve French <sfrench@samba.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: linux-cifs@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: linux-mtd@lists.infradead.org
Cc: linux-rdma@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: netdev@vger.kernel.org
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20230325084537.3622280-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 9 deletions

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 8996bd0a194a..0bb59da24922 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -31,12 +31,12 @@
 /* "show" function for the bond_masters attribute.
  * The class parameter is ignored.
  */
-static ssize_t bonding_show_bonds(struct class *cls,
-				  struct class_attribute *attr,
+static ssize_t bonding_show_bonds(const struct class *cls,
+				  const struct class_attribute *attr,
 				  char *buf)
 {
-	struct bond_net *bn =
-		container_of(attr, struct bond_net, class_attr_bonding_masters);
+	const struct bond_net *bn =
+		container_of_const(attr, struct bond_net, class_attr_bonding_masters);
 	int res = 0;
 	struct bonding *bond;
 
@@ -59,7 +59,7 @@ static ssize_t bonding_show_bonds(struct class *cls,
 	return res;
 }
 
-static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
+static struct net_device *bond_get_by_name(const struct bond_net *bn, const char *ifname)
 {
 	struct bonding *bond;
 
@@ -75,12 +75,12 @@ static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifna
  *
  * The class parameter is ignored.
  */
-static ssize_t bonding_store_bonds(struct class *cls,
-				   struct class_attribute *attr,
+static ssize_t bonding_store_bonds(const struct class *cls,
+				   const struct class_attribute *attr,
 				   const char *buffer, size_t count)
 {
-	struct bond_net *bn =
-		container_of(attr, struct bond_net, class_attr_bonding_masters);
+	const struct bond_net *bn =
+		container_of_const(attr, struct bond_net, class_attr_bonding_masters);
 	char command[IFNAMSIZ + 1] = {0, };
 	char *ifname;
 	int rv, res = count;