staging: lustre: constify attribute_group structures.

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work
with const attribute_group. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   9489	    992	     40	  10521	   2919	lustre/lustre/osc/lproc_osc.o
   1289	    288	      0	   1577	    629	lustre/lustre/lmv/lproc_lmv.o
   3794	    928	     40	   4762	   129a	lustre/lustre/lov/lproc_lov.o
   3802	    576	     40	   4418	   1142	lustre/lustre/mdc/lproc_mdc.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   9553	    928	     40	  10521	   2919	lustre/lustre/osc/lproc_osc.o
   1353	    224	      0	   1577	    629	lustre/lustre/lmv/lproc_lmv.o
   3858	    864	     40	   4762	   129a	lustre/lustre/lov/lproc_lov.o
   3866	    512	     40	   4418	   1142	lustre/lustre/mdc/lproc_mdc.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lprocfs_status.h

@@ -59,7 +59,7 @@ struct lprocfs_vars {
 
 struct lprocfs_static_vars {
 	struct lprocfs_vars *obd_vars;
-	struct attribute_group *sysfs_vars;
+	const struct attribute_group *sysfs_vars;
 };
 
 /* if we find more consumers this could be generalized */
@@ -468,7 +468,7 @@ struct dentry *ldebugfs_register(const char *name,
 void ldebugfs_remove(struct dentry **entryp);
 
 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list,
-		      struct attribute_group *attrs);
+		      const struct attribute_group *attrs);
 int lprocfs_obd_cleanup(struct obd_device *obd);
 
 int ldebugfs_seq_create(struct dentry *parent,

drivers/staging/lustre/lustre/lmv/lproc_lmv.c

@@ -161,7 +161,7 @@ static struct attribute *lmv_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group lmv_attr_group = {
+static const struct attribute_group lmv_attr_group = {
 	.attrs = lmv_attrs,
 };
 

drivers/staging/lustre/lustre/lov/lproc_lov.c

@@ -279,7 +279,7 @@ static struct attribute *lov_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group lov_attr_group = {
+static const struct attribute_group lov_attr_group = {
 	.attrs = lov_attrs,
 };
 

drivers/staging/lustre/lustre/mdc/lproc_mdc.c

@@ -219,7 +219,7 @@ static struct attribute *mdc_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group mdc_attr_group = {
+static const struct attribute_group mdc_attr_group = {
 	.attrs = mdc_attrs,
 };
 

drivers/staging/lustre/lustre/obdclass/lprocfs_status.c

@@ -1031,7 +1031,7 @@ static struct kobj_type obd_ktype = {
 };
 
 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list,
-		      struct attribute_group *attrs)
+		      const struct attribute_group *attrs)
 {
 	int rc = 0;
 

drivers/staging/lustre/lustre/osc/lproc_osc.c

@@ -831,7 +831,7 @@ static struct attribute *osc_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group osc_attr_group = {
+static const struct attribute_group osc_attr_group = {
 	.attrs = osc_attrs,
 };