diff --git a/mm/mmap.c b/mm/mmap.c
index e27bc5dcd6c4..4473c5e2c57c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -684,23 +684,17 @@ static void __insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma)
 
 static __always_inline void __vma_unlink_common(struct mm_struct *mm,
 						struct vm_area_struct *vma,
-						struct vm_area_struct *prev,
-						bool has_prev,
 						struct vm_area_struct *ignore)
 {
-	struct vm_area_struct *next;
+	struct vm_area_struct *prev, *next;
 
 	vma_rb_erase_ignore(vma, &mm->mm_rb, ignore);
 	next = vma->vm_next;
-	if (has_prev)
+	prev = vma->vm_prev;
+	if (prev)
 		prev->vm_next = next;
-	else {
-		prev = vma->vm_prev;
-		if (prev)
-			prev->vm_next = next;
-		else
-			mm->mmap = next;
-	}
+	else
+		mm->mmap = next;
 	if (next)
 		next->vm_prev = prev;
 
@@ -712,7 +706,7 @@ static inline void __vma_unlink_prev(struct mm_struct *mm,
 				     struct vm_area_struct *vma,
 				     struct vm_area_struct *prev)
 {
-	__vma_unlink_common(mm, vma, prev, true, vma);
+	__vma_unlink_common(mm, vma, vma);
 }
 
 /*
@@ -898,7 +892,7 @@ again:
 			 * "next" (which is stored in post-swap()
 			 * "vma").
 			 */
-			__vma_unlink_common(mm, next, NULL, false, vma);
+			__vma_unlink_common(mm, next, vma);
 		if (file)
 			__remove_shared_vm_struct(next, file, mapping);
 	} else if (insert) {