mm/damon/core: use damos_commit_quota_goal() for new goal commit

When damos_commit_quota_goals() is called for adding new DAMOS quota goals
of DAMOS_QUOTA_USER_INPUT metric, current_value fields of the new goals
should be also set as requested.

However, damos_commit_quota_goals() is not updating the field for the
case, since it is setting only metrics and target values using
damos_new_quota_goal(), and metric-optional union fields using
damos_commit_quota_goal_union().  As a result, users could see the first
current_value parameter that committed online with a new quota goal is
ignored.  Users are assumed to commit the current_value for
DAMOS_QUOTA_USER_INPUT quota goals, since it is being used as a feedback. 
Hence the real impact would be subtle.  That said, this is obviously not
intended behavior.

Fix the issue by using damos_commit_quota_goal() which sets all quota goal
parameters, instead of damos_commit_quota_goal_union(), which sets only
the union fields.

Link: https://lkml.kernel.org/r/20251014001846.279282-1-sj@kernel.org
Fixes: 1aef9df ("mm/damon/core: commit damos_quota_goal->nid")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>	[6.16+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: sjp38

mm/damon/core.c

@@ -835,7 +835,7 @@ int damos_commit_quota_goals(struct damos_quota *dst, struct damos_quota *src)
 				src_goal->metric, src_goal->target_value);
 		if (!new_goal)
 			return -ENOMEM;
-		damos_commit_quota_goal_union(new_goal, src_goal);
+		damos_commit_quota_goal(new_goal, src_goal);
 		damos_add_quota_goal(dst, new_goal);
 	}
 	return 0;