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

Signed-off-by: Cong Wang <amwang@redhat.com>
diff --git a/mm/bounce.c b/mm/bounce.c
index 4e9ae72..d1be02c 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -50,9 +50,9 @@
 	unsigned char *vto;
 
 	local_irq_save(flags);
-	vto = kmap_atomic(to->bv_page, KM_BOUNCE_READ);
+	vto = kmap_atomic(to->bv_page);
 	memcpy(vto + to->bv_offset, vfrom, to->bv_len);
-	kunmap_atomic(vto, KM_BOUNCE_READ);
+	kunmap_atomic(vto);
 	local_irq_restore(flags);
 }