[RFC PATCH v2 3/8] mm/damon/ops-common: support hugepage_size damon filter matching

[SJ Park <sj@kernel.org>]

Update ops-common data attribute filter matching logic to support
hugepage_size filter type.

Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/ops-common.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
index c36cc39cd2c70..77366f42b3e5b 100644
--- a/mm/damon/ops-common.c
+++ b/mm/damon/ops-common.c
@@ -536,6 +536,7 @@ bool damon_ops_filter_match(struct damon_filter *filter, struct folio *folio)
 {
 	bool matched = false;
 	struct mem_cgroup *memcg;
+	size_t folio_sz;
 
 	switch (filter->type) {
 	case DAMON_FILTER_TYPE_ANON:
@@ -558,6 +559,15 @@ bool damon_ops_filter_match(struct damon_filter *filter, struct folio *folio)
 			matched = filter->memcg_id == mem_cgroup_id(memcg);
 		rcu_read_unlock();
 		break;
+	case DAMON_FILTER_TYPE_HUGEPAGE_SIZE:
+		if (!folio) {
+			matched = false;
+			break;
+		}
+		folio_sz = folio_size(folio);
+		matched = filter->range_min <= folio_sz &&
+			folio_sz <= filter->range_max;
+		break;
 	default:
 		break;
 	}
-- 
2.47.3