xfs: make kobj_type structures constant

Since commit ee6d3dd4 ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.

Take advantage of this to constify the structure definitions to prevent
modification at runtime.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/xfs/xfs_error.c

@@ -228,7 +228,7 @@ static struct attribute *xfs_errortag_attrs[] = {
 };
 ATTRIBUTE_GROUPS(xfs_errortag);
 
-static struct kobj_type xfs_errortag_ktype = {
+static const struct kobj_type xfs_errortag_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_errortag_sysfs_ops,
 	.default_groups = xfs_errortag_groups,

fs/xfs/xfs_sysfs.c

@@ -69,7 +69,7 @@ static struct attribute *xfs_mp_attrs[] = {
 };
 ATTRIBUTE_GROUPS(xfs_mp);
 
-struct kobj_type xfs_mp_ktype = {
+const struct kobj_type xfs_mp_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_sysfs_ops,
 	.default_groups = xfs_mp_groups,
@@ -266,7 +266,7 @@ static struct attribute *xfs_dbg_attrs[] = {
 };
 ATTRIBUTE_GROUPS(xfs_dbg);
 
-struct kobj_type xfs_dbg_ktype = {
+const struct kobj_type xfs_dbg_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_sysfs_ops,
 	.default_groups = xfs_dbg_groups,
@@ -324,7 +324,7 @@ static struct attribute *xfs_stats_attrs[] = {
 };
 ATTRIBUTE_GROUPS(xfs_stats);
 
-struct kobj_type xfs_stats_ktype = {
+const struct kobj_type xfs_stats_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_sysfs_ops,
 	.default_groups = xfs_stats_groups,
@@ -410,7 +410,7 @@ static struct attribute *xfs_log_attrs[] = {
 };
 ATTRIBUTE_GROUPS(xfs_log);
 
-struct kobj_type xfs_log_ktype = {
+const struct kobj_type xfs_log_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_sysfs_ops,
 	.default_groups = xfs_log_groups,
@@ -564,13 +564,13 @@ static struct attribute *xfs_error_attrs[] = {
 };
 ATTRIBUTE_GROUPS(xfs_error);
 
-static struct kobj_type xfs_error_cfg_ktype = {
+static const struct kobj_type xfs_error_cfg_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_sysfs_ops,
 	.default_groups = xfs_error_groups,
 };
 
-static struct kobj_type xfs_error_ktype = {
+static const struct kobj_type xfs_error_ktype = {
 	.release = xfs_sysfs_release,
 	.sysfs_ops = &xfs_sysfs_ops,
 };

fs/xfs/xfs_sysfs.h

@@ -7,10 +7,10 @@
 #ifndef __XFS_SYSFS_H__
 #define __XFS_SYSFS_H__
 
-extern struct kobj_type xfs_mp_ktype;	/* xfs_mount */
-extern struct kobj_type xfs_dbg_ktype;	/* debug */
-extern struct kobj_type xfs_log_ktype;	/* xlog */
-extern struct kobj_type xfs_stats_ktype;	/* stats */
+extern const struct kobj_type xfs_mp_ktype;	/* xfs_mount */
+extern const struct kobj_type xfs_dbg_ktype;	/* debug */
+extern const struct kobj_type xfs_log_ktype;	/* xlog */
+extern const struct kobj_type xfs_stats_ktype;	/* stats */
 
 static inline struct xfs_kobj *
 to_kobj(struct kobject *kobject)
@@ -28,7 +28,7 @@ xfs_sysfs_release(struct kobject *kobject)
 static inline int
 xfs_sysfs_init(
 	struct xfs_kobj		*kobj,
-	struct kobj_type	*ktype,
+	const struct kobj_type	*ktype,
 	struct xfs_kobj		*parent_kobj,
 	const char		*name)
 {