ascend: mm_struct: introduce new parameter for share pool features

ascend inclusion
category: feature
bugzilla: NA
CVE: NA

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

The mm->sp_group is mainly used to find out the group which owns the
mm, and the group could use the mm->sp_node to list and find out the
mm, the mm->sp_stat_id is used for collecting memory information.

This changes will affect and destroy the kabi only when enable the
ascend_share_pool config.
Signed-off-by: NTang Yizhou <tangyizhou@huawei.com>
Signed-off-by: NLi Ming <limingming.li@huawei.com>
Signed-off-by: NZefan Li <lizefan@huawei.com>
Signed-off-by: NZhou Guanghui <zhouguanghui1@huawei.com>
Signed-off-by: NDing Tianhong <dingtianhong@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

include/linux/mm_types.h

@@ -468,6 +468,11 @@ struct mm_struct {
 #endif
 		struct user_namespace *user_ns;
 
+#ifdef CONFIG_ASCEND_SHARE_POOL
+		struct sp_group *sp_group;
+		struct list_head sp_node;       /* link to sp_group->procs */
+		int sp_stat_id;
+#endif
 		/* store ref to file /proc/<pid>/exe symlink points to */
 		struct file __rcu *exe_file;
 #ifdef CONFIG_MMU_NOTIFIER