jbd2: remove the second argument of k[un]map_atomic()

Signed-off-by: Cong Wang <amwang@redhat.com>
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 5069b84..c067a8c 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -286,10 +286,10 @@
 	char *addr;
 	__u32 checksum;
 
-	addr = kmap_atomic(page, KM_USER0);
+	addr = kmap_atomic(page);
 	checksum = crc32_be(crc32_sum,
 		(void *)(addr + offset_in_page(bh->b_data)), bh->b_size);
-	kunmap_atomic(addr, KM_USER0);
+	kunmap_atomic(addr);
 
 	return checksum;
 }