diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 3610e99..d79ce2e 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -50,7 +50,7 @@
 #define CIFS_MAGIC_NUMBER 0xFF534D42	/* the first four bytes of SMB PDUs */
 
 #ifdef CONFIG_CIFS_QUOTA
-static struct quotactl_ops cifs_quotactl_ops;
+static const struct quotactl_ops cifs_quotactl_ops;
 #endif /* QUOTA */
 
 int cifsFYI = 0;
@@ -517,7 +517,7 @@
 	return rc;
 }
 
-static struct quotactl_ops cifs_quotactl_ops = {
+static const struct quotactl_ops cifs_quotactl_ops = {
 	.set_xquota	= cifs_xquota_set,
 	.get_xquota	= cifs_xquota_get,
 	.set_xstate	= cifs_xstate_set,
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index e7a4e11..72743d3 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -737,7 +737,7 @@
 	.destroy_dquot	= dquot_destroy,
 };
 
-static struct quotactl_ops ext3_qctl_operations = {
+static const struct quotactl_ops ext3_qctl_operations = {
 	.quota_on	= ext3_quota_on,
 	.quota_off	= vfs_quota_off,
 	.quota_sync	= vfs_quota_sync,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 7ffb62e..df539ba 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -985,7 +985,7 @@
 	.destroy_dquot	= dquot_destroy,
 };
 
-static struct quotactl_ops ext4_qctl_operations = {
+static const struct quotactl_ops ext4_qctl_operations = {
 	.quota_on	= ext4_quota_on,
 	.quota_off	= vfs_quota_off,
 	.quota_sync	= vfs_quota_sync,
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index a3f8871..faca472 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -965,7 +965,7 @@
 	return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
 }
 
-static struct quotactl_ops ocfs2_quotactl_ops = {
+static const struct quotactl_ops ocfs2_quotactl_ops = {
 	.quota_on	= ocfs2_quota_on,
 	.quota_off	= ocfs2_quota_off,
 	.quota_sync	= vfs_quota_sync,
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 635ae2e..39b49c4 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2461,7 +2461,7 @@
 }
 EXPORT_SYMBOL(vfs_set_dqinfo);
 
-struct quotactl_ops vfs_quotactl_ops = {
+const struct quotactl_ops vfs_quotactl_ops = {
 	.quota_on	= vfs_quota_on,
 	.quota_off	= vfs_quota_off,
 	.quota_sync	= vfs_quota_sync,
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 09c93c1..f0ad05f 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -629,7 +629,7 @@
 	.destroy_dquot	= dquot_destroy,
 };
 
-static struct quotactl_ops reiserfs_qctl_operations = {
+static const struct quotactl_ops reiserfs_qctl_operations = {
 	.quota_on = reiserfs_quota_on,
 	.quota_off = vfs_quota_off,
 	.quota_sync = vfs_quota_sync,
diff --git a/fs/xfs/linux-2.6/xfs_quotaops.c b/fs/xfs/linux-2.6/xfs_quotaops.c
index cb6e2cc..9e41f91 100644
--- a/fs/xfs/linux-2.6/xfs_quotaops.c
+++ b/fs/xfs/linux-2.6/xfs_quotaops.c
@@ -150,7 +150,7 @@
 	return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq);
 }
 
-struct quotactl_ops xfs_quotactl_operations = {
+const struct quotactl_ops xfs_quotactl_operations = {
 	.quota_sync		= xfs_fs_quota_sync,
 	.get_xstate		= xfs_fs_get_xstate,
 	.set_xstate		= xfs_fs_set_xstate,
diff --git a/fs/xfs/linux-2.6/xfs_super.h b/fs/xfs/linux-2.6/xfs_super.h
index 5a2ea3a..18175eb 100644
--- a/fs/xfs/linux-2.6/xfs_super.h
+++ b/fs/xfs/linux-2.6/xfs_super.h
@@ -93,7 +93,7 @@
 
 extern const struct export_operations xfs_export_operations;
 extern struct xattr_handler *xfs_xattr_handlers[];
-extern struct quotactl_ops xfs_quotactl_operations;
+extern const struct quotactl_ops xfs_quotactl_operations;
 
 #define XFS_M(sb)		((struct xfs_mount *)((sb)->s_fs_info))
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 83e1a0c..13c030e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1319,7 +1319,7 @@
 	struct file_system_type	*s_type;
 	const struct super_operations	*s_op;
 	const struct dquot_operations	*dq_op;
- 	struct quotactl_ops	*s_qcop;
+	const struct quotactl_ops	*s_qcop;
 	const struct export_operations *s_export_op;
 	unsigned long		s_flags;
 	unsigned long		s_magic;
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 8dcbdb6..3ebb231 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -136,7 +136,7 @@
  * Operations supported for diskquotas.
  */
 extern const struct dquot_operations dquot_operations;
-extern struct quotactl_ops vfs_quotactl_ops;
+extern const struct quotactl_ops vfs_quotactl_ops;
 
 #define sb_dquot_ops (&dquot_operations)
 #define sb_quotactl_ops (&vfs_quotactl_ops)