diff --git a/mm/mmap.c b/mm/mmap.c
index f7786542c59d..538c905d6d9b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1102,17 +1102,6 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
 	return mmap_region(file, addr, len, flags, vm_flags, pgoff);
 }
 
-static unsigned long do_mmap(struct file *file, unsigned long addr,
-	unsigned long len, unsigned long prot,
-	unsigned long flag, unsigned long offset)
-{
-	if (unlikely(offset + PAGE_ALIGN(len) < offset))
-		return -EINVAL;
-	if (unlikely(offset & ~PAGE_MASK))
-		return -EINVAL;
-	return do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
-}
-
 unsigned long vm_mmap(struct file *file, unsigned long addr,
 	unsigned long len, unsigned long prot,
 	unsigned long flag, unsigned long offset)
@@ -1120,10 +1109,15 @@ unsigned long vm_mmap(struct file *file, unsigned long addr,
 	unsigned long ret;
 	struct mm_struct *mm = current->mm;
 
+	if (unlikely(offset + PAGE_ALIGN(len) < offset))
+		return -EINVAL;
+	if (unlikely(offset & ~PAGE_MASK))
+		return -EINVAL;
+
 	ret = security_mmap_file(file, prot, flag);
 	if (!ret) {
 		down_write(&mm->mmap_sem);
-		ret = do_mmap(file, addr, len, prot, flag, offset);
+		ret = do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
 		up_write(&mm->mmap_sem);
 	}
 	return ret;
diff --git a/mm/nommu.c b/mm/nommu.c
index a1792ed2cb1a..e6123a5b2cc1 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1470,17 +1470,6 @@ error_getting_region:
 	return -ENOMEM;
 }
 
-static unsigned long do_mmap(struct file *file, unsigned long addr,
-	unsigned long len, unsigned long prot,
-	unsigned long flag, unsigned long offset)
-{
-	if (unlikely(offset + PAGE_ALIGN(len) < offset))
-		return -EINVAL;
-	if (unlikely(offset & ~PAGE_MASK))
-		return -EINVAL;
-	return do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
-}
-
 unsigned long vm_mmap(struct file *file, unsigned long addr,
 	unsigned long len, unsigned long prot,
 	unsigned long flag, unsigned long offset)
@@ -1488,10 +1477,15 @@ unsigned long vm_mmap(struct file *file, unsigned long addr,
 	unsigned long ret;
 	struct mm_struct *mm = current->mm;
 
+	if (unlikely(offset + PAGE_ALIGN(len) < offset))
+		return -EINVAL;
+	if (unlikely(offset & ~PAGE_MASK))
+		return -EINVAL;
+
 	ret = security_mmap_file(file, prot, flag);
 	if (!ret) {
 		down_write(&mm->mmap_sem);
-		ret = do_mmap(file, addr, len, prot, flag, offset);
+		ret = do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
 		up_write(&mm->mmap_sem);
 	}
 	return ret;