diff --git a/dm-compress/lbd.c b/dm-compress/lbd.c
index de1a4d2..c907494 100644
--- a/dm-compress/lbd.c
+++ b/dm-compress/lbd.c
@@ -258,6 +258,7 @@ lbd_ctr(struct lbd* lbd,
         void* percpu)
 {
     u32 nr_pages = DIV_ROUND_UP(lblk_size(&kparams->params), PAGE_SIZE);
+    BUG_ON(nr_pages == 1);
 
     memset(lbd, 0, sizeof(struct lbd));
     INIT_LIST_HEAD(&lbd->lru_list);
@@ -279,14 +280,9 @@ lbd_ctr(struct lbd* lbd,
     if (!cbd_alloc_pagev(lbd->pagev, nr_pages)) {
         return false;
     }
-    if (nr_pages == 1) {
-        lbd->buf = page_address(lbd->pagev[0]);
-    }
-    else {
-        lbd->buf = vmap(lbd->pagev, nr_pages, VM_MAP, PAGE_KERNEL);
-        if (!lbd->buf) {
-            return false;
-        }
+    lbd->buf = vmap(lbd->pagev, nr_pages, VM_MAP, PAGE_KERNEL);
+    if (!lbd->buf) {
+        return false;
     }
     lbd->c_len = 0;
 
@@ -311,9 +307,7 @@ lbd_dtr(struct lbd* lbd)
         printk(KERN_ERR "%s: lbatviewcache_put failed\n", __func__);
     }
     lbd->c_len = 0;
-    if (nr_pages != 1) {
-        vunmap(lbd->buf);
-    }
+    vunmap(lbd->buf);
     lbd->buf = NULL;
     if (lbd->pagev) {
         cbd_free_pagev(lbd->pagev, nr_pages);