diff --git a/mm/shmem_quota.c b/mm/shmem_quota.c
index 062d1c1097ae..ce514e700d2f 100644
--- a/mm/shmem_quota.c
+++ b/mm/shmem_quota.c
@@ -116,7 +116,7 @@ static int shmem_free_file_info(struct super_block *sb, int type)
 static int shmem_get_next_id(struct super_block *sb, struct kqid *qid)
 {
 	struct mem_dqinfo *info = sb_dqinfo(sb, qid->type);
-	struct rb_node *node = ((struct rb_root *)info->dqi_priv)->rb_node;
+	struct rb_node *node;
 	qid_t id = from_kqid(&init_user_ns, *qid);
 	struct quota_info *dqopt = sb_dqopt(sb);
 	struct quota_id *entry = NULL;
@@ -126,6 +126,7 @@ static int shmem_get_next_id(struct super_block *sb, struct kqid *qid)
 		return -ESRCH;
 
 	down_read(&dqopt->dqio_sem);
+	node = ((struct rb_root *)info->dqi_priv)->rb_node;
 	while (node) {
 		entry = rb_entry(node, struct quota_id, node);
 
@@ -165,7 +166,7 @@ out_unlock:
 static int shmem_acquire_dquot(struct dquot *dquot)
 {
 	struct mem_dqinfo *info = sb_dqinfo(dquot->dq_sb, dquot->dq_id.type);
-	struct rb_node **n = &((struct rb_root *)info->dqi_priv)->rb_node;
+	struct rb_node **n;
 	struct shmem_sb_info *sbinfo = dquot->dq_sb->s_fs_info;
 	struct rb_node *parent = NULL, *new_node = NULL;
 	struct quota_id *new_entry, *entry;
@@ -176,6 +177,8 @@ static int shmem_acquire_dquot(struct dquot *dquot)
 	mutex_lock(&dquot->dq_lock);
 
 	down_write(&dqopt->dqio_sem);
+	n = &((struct rb_root *)info->dqi_priv)->rb_node;
+
 	while (*n) {
 		parent = *n;
 		entry = rb_entry(parent, struct quota_id, node);
@@ -264,7 +267,7 @@ static bool shmem_is_empty_dquot(struct dquot *dquot)
 static int shmem_release_dquot(struct dquot *dquot)
 {
 	struct mem_dqinfo *info = sb_dqinfo(dquot->dq_sb, dquot->dq_id.type);
-	struct rb_node *node = ((struct rb_root *)info->dqi_priv)->rb_node;
+	struct rb_node *node;
 	qid_t id = from_kqid(&init_user_ns, dquot->dq_id);
 	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
 	struct quota_id *entry = NULL;
@@ -275,6 +278,7 @@ static int shmem_release_dquot(struct dquot *dquot)
 		goto out_dqlock;
 
 	down_write(&dqopt->dqio_sem);
+	node = ((struct rb_root *)info->dqi_priv)->rb_node;
 	while (node) {
 		entry = rb_entry(node, struct quota_id, node);