mm: remove the second argument of k[un]map_atomic()

Signed-off-by: Cong Wang <amwang@redhat.com>
diff --git a/mm/filemap.c b/mm/filemap.c
index b662757..2f81650 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1318,10 +1318,10 @@
 	 * taking the kmap.
 	 */
 	if (!fault_in_pages_writeable(desc->arg.buf, size)) {
-		kaddr = kmap_atomic(page, KM_USER0);
+		kaddr = kmap_atomic(page);
 		left = __copy_to_user_inatomic(desc->arg.buf,
 						kaddr + offset, size);
-		kunmap_atomic(kaddr, KM_USER0);
+		kunmap_atomic(kaddr);
 		if (left == 0)
 			goto success;
 	}
@@ -2045,7 +2045,7 @@
 	size_t copied;
 
 	BUG_ON(!in_atomic());
-	kaddr = kmap_atomic(page, KM_USER0);
+	kaddr = kmap_atomic(page);
 	if (likely(i->nr_segs == 1)) {
 		int left;
 		char __user *buf = i->iov->iov_base + i->iov_offset;
@@ -2055,7 +2055,7 @@
 		copied = __iovec_copy_from_user_inatomic(kaddr + offset,
 						i->iov, i->iov_offset, bytes);
 	}
-	kunmap_atomic(kaddr, KM_USER0);
+	kunmap_atomic(kaddr);
 
 	return copied;
 }