[PATCH v2 6/8] writeback: factor out balance_domain_limits to remove repeated code

[Kemeng Shi <shikemeng@huaweicloud.com>]

Factor out balance_domain_limits to remove repeated code.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Acked-by: Tejun Heo <tj@kernel.org>
---
 mm/page-writeback.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b9c8db7089ef..97ee5b32b4ef 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1746,6 +1746,14 @@ static void domain_dirty_freerun(struct dirty_throttle_control *dtc,
 	dtc->freerun = dirty <= dirty_freerun_ceiling(thresh, bg_thresh);
 }
 
+static void balance_domain_limits(struct dirty_throttle_control *dtc,
+				  bool strictlimit)
+{
+	domain_dirty_avail(dtc, true);
+	domain_dirty_limits(dtc);
+	domain_dirty_freerun(dtc, strictlimit);
+}
+
 static void wb_dirty_freerun(struct dirty_throttle_control *dtc,
 			     bool strictlimit)
 {
@@ -1802,18 +1810,13 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
 
 		nr_dirty = global_node_page_state(NR_FILE_DIRTY);
 
-		domain_dirty_avail(gdtc, true);
-		domain_dirty_limits(gdtc);
-		domain_dirty_freerun(gdtc, strictlimit);
-
+		balance_domain_limits(gdtc, strictlimit);
 		if (mdtc) {
 			/*
 			 * If @wb belongs to !root memcg, repeat the same
 			 * basic calculations for the memcg domain.
 			 */
-			domain_dirty_avail(mdtc, true);
-			domain_dirty_limits(mdtc);
-			domain_dirty_freerun(mdtc, strictlimit);
+			balance_domain_limits(mdtc, strictlimit);
 		}
 
 		/*
-- 
2.30.0