diff --git a/mm/mmap.c b/mm/mmap.c
index 7acd7b0ad176..c646618702cf 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1265,8 +1265,8 @@ out:
 	mm->total_vm += len >> PAGE_SHIFT;
 	vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
 	if (vm_flags & VM_LOCKED) {
-		long nr_pages = mlock_vma_pages_range(vma, addr, addr + len);
-		mm->locked_vm += (len >> PAGE_SHIFT) - nr_pages;
+		if (!mlock_vma_pages_range(vma, addr, addr + len))
+			mm->locked_vm += (len >> PAGE_SHIFT);
 	} else if ((flags & MAP_POPULATE) && !(flags & MAP_NONBLOCK))
 		make_pages_present(addr, addr + len);
 	return addr;