kabi: fix kabi broken in struct mm_struct

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI
CVE: NA

-------------------------------------------------

fix kabi broken in struct mm_struct
It's introduced by b82e34a7 ("ascend: mm_struct: introduce new parameter...")
Signed-off-by: NZhou Guanghui <zhouguanghui1@huawei.com>
Reviewed-by: NWeilong Chen <chenweilong@huawei.com>
Reviewed-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

include/linux/mm_types.h

@@ -520,11 +520,15 @@ struct mm_struct {
 	KABI_RESERVE(1)
 #endif
 
-#ifdef CONFIG_ASCEND_SHARE_POOL
-	struct sp_group_master *sp_group_master;
+#if IS_ENABLED(CONFIG_ASCEND_SHARE_POOL) && !defined(__GENKSYMS__)
+	union {
+		struct sp_group_master *sp_group_master;
+		unsigned long kabi_reserve1;
+	};
+#else
+	KABI_RESERVE(2)
 #endif
 
-	KABI_RESERVE(2)
 	KABI_RESERVE(3)
 	KABI_RESERVE(4)
 	KABI_RESERVE(5)