[PATCH 04/22] mm/damon/core: factor out 'damos_quota' private fileds initialization

[SeongJae Park <sj@kernel.org>]

The 'struct damos' creation function, 'damon_new_scheme()', does
initialization of private fileds of 'struct damos_quota' in it.  As its
verbose and makes the function unnecessarily long, this commit factors
it out to separate function.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 mm/damon/core.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 27e0c312f7a5..6767580c0a27 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -267,6 +267,19 @@ int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
 	return 0;
 }
 
+/* initialize private fields of damos_quota and return the pointer */
+static struct damos_quota *damos_quota_init_priv(struct damos_quota *quota)
+{
+	quota->total_charged_sz = 0;
+	quota->total_charged_ns = 0;
+	quota->esz = 0;
+	quota->charged_sz = 0;
+	quota->charged_from = 0;
+	quota->charge_target_from = NULL;
+	quota->charge_addr_from = 0;
+	return quota;
+}
+
 struct damos *damon_new_scheme(struct damos_access_pattern *pattern,
 			enum damos_action action, struct damos_quota *quota,
 			struct damos_watermarks *wmarks)
@@ -281,15 +294,7 @@ struct damos *damon_new_scheme(struct damos_access_pattern *pattern,
 	scheme->stat = (struct damos_stat){};
 	INIT_LIST_HEAD(&scheme->list);
 
-	scheme->quota = *quota;
-	/* caller might not zero-initialized the private fileds */
-	scheme->quota.total_charged_sz = 0;
-	scheme->quota.total_charged_ns = 0;
-	scheme->quota.esz = 0;
-	scheme->quota.charged_sz = 0;
-	scheme->quota.charged_from = 0;
-	scheme->quota.charge_target_from = NULL;
-	scheme->quota.charge_addr_from = 0;
+	scheme->quota = *(damos_quota_init_priv(quota));
 
 	scheme->wmarks = *wmarks;
 	scheme->wmarks.activated = true;
-- 
2.25.1