mnt: Optimize mntinfo_add_list to O(1) using a tail pointer

criu/mount.c

@@ -127,11 +127,16 @@ static void mntinfo_add_list(struct mount_info *new)
 
 void mntinfo_add_list_before(struct mount_info **head, struct mount_info *new)
 {
+<<<<<<< HEAD
         if (!*head)
                 tailbuffer = new;
 
         INIT_LIST_HEAD(&new->tail);
         list_add_tail(&tailbuffer->tail, &new->tail);
+=======
+	if (!*head)
+		tail_buffer = new;
+>>>>>>> 679741f33 (optimize: added a tail pointer in mntinfo_add_list)
 
 	new->next = *head;
 	*head = new;
@@ -1204,7 +1209,7 @@ int __check_mountpoint_fd(struct mount_info *pm, int mnt_fd, bool parse_mountinf
 			return 0;
 
 		pr_warn("The file system %#x %#x (%#x) %s %s is inaccessible\n", pm->s_dev, pm->s_dev_rt, dev,
-			pm->fstype->name, pm->ns_mountpoint);
+		        pm->fstype->name, pm->ns_mountpoint);
 		return -1;
 	}
 
@@ -1961,7 +1966,7 @@ static int dump_mnt_ns(struct ns_id *ns, struct mount_info *pms)
 				_mi = list_entry(_mi->children._el, struct mount_info, siblings); \
 				continue;                                                         \
 			}                                                                         \
-up:                                                                                               \
+		up:                                                                               \
 			if (_fn_r(_mi))                                                           \
 				return -1;                                                        \
 			if (_mi == _r)                                                            \