diff --git a/drivers/staging/rdma/hfi1/mmu_rb.c b/drivers/staging/rdma/hfi1/mmu_rb.c
index c30373df38749d32ea999417c1fbc15af9c90808..5d27fee577b985816edafed7036a1f4f9048291b 100644
--- a/drivers/staging/rdma/hfi1/mmu_rb.c
+++ b/drivers/staging/rdma/hfi1/mmu_rb.c
@@ -98,7 +98,7 @@ int hfi1_mmu_rb_register(struct rb_root *root, struct mmu_rb_ops *ops)
 	struct mmu_rb_handler *handlr;
 	unsigned long flags;
 
-	if (!ops->compare || !ops->invalidate)
+	if (!ops->invalidate)
 		return -EINVAL;
 
 	handlr = kmalloc(sizeof(*handlr), GFP_KERNEL);
diff --git a/drivers/staging/rdma/hfi1/mmu_rb.h b/drivers/staging/rdma/hfi1/mmu_rb.h
index abed3a69e4675095c8dcd3cddd1f464bf05ae4d4..9c2600981e88f8f00fed9c524ea60114a6564479 100644
--- a/drivers/staging/rdma/hfi1/mmu_rb.h
+++ b/drivers/staging/rdma/hfi1/mmu_rb.h
@@ -57,8 +57,6 @@ struct mmu_rb_node {
 };
 
 struct mmu_rb_ops {
-	int (*compare)(struct mmu_rb_node *, unsigned long,
-		       unsigned long);
 	int (*insert)(struct rb_root *, struct mmu_rb_node *);
 	void (*remove)(struct rb_root *, struct mmu_rb_node *, bool);
 	int (*invalidate)(struct rb_root *, struct mmu_rb_node *);
diff --git a/drivers/staging/rdma/hfi1/user_exp_rcv.c b/drivers/staging/rdma/hfi1/user_exp_rcv.c
index 1d971c0fedd6c3f770d8aad6b2392f3c48401249..bf670cbf82da36d1ca60f8cb0cff0e60029bb813 100644
--- a/drivers/staging/rdma/hfi1/user_exp_rcv.c
+++ b/drivers/staging/rdma/hfi1/user_exp_rcv.c
@@ -86,8 +86,6 @@ static void unlock_exp_tids(struct hfi1_ctxtdata *, struct exp_tid_set *,
 static u32 find_phys_blocks(struct page **, unsigned, struct tid_pageset *);
 static int set_rcvarray_entry(struct file *, unsigned long, u32,
 			      struct tid_group *, struct page **, unsigned);
-static inline int mmu_addr_cmp(struct mmu_rb_node *, unsigned long,
-			       unsigned long);
 static int mmu_rb_insert(struct rb_root *, struct mmu_rb_node *);
 static void mmu_rb_remove(struct rb_root *, struct mmu_rb_node *, bool);
 static int mmu_rb_invalidate(struct rb_root *, struct mmu_rb_node *);
@@ -98,7 +96,6 @@ static int unprogram_rcvarray(struct file *, u32, struct tid_group **);
 static void clear_tid_node(struct hfi1_filedata *, u16, struct tid_rb_node *);
 
 static struct mmu_rb_ops tid_rb_ops = {
-	.compare = mmu_addr_cmp,
 	.insert = mmu_rb_insert,
 	.remove = mmu_rb_remove,
 	.invalidate = mmu_rb_invalidate
@@ -1016,17 +1013,6 @@ static int mmu_rb_invalidate(struct rb_root *root, struct mmu_rb_node *mnode)
 	return 0;
 }
 
-static int mmu_addr_cmp(struct mmu_rb_node *node, unsigned long addr,
-			unsigned long len)
-{
-	if ((addr + len) <= node->addr)
-		return -1;
-	else if (addr >= node->addr && addr < (node->addr + node->len))
-		return 0;
-	else
-		return 1;
-}
-
 static int mmu_rb_insert(struct rb_root *root, struct mmu_rb_node *node)
 {
 	struct hfi1_filedata *fdata =