linux-kernel - [PATCH 4/8] mm/damon/core: expose damos_filter_for

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Message-Id: <20250220194646.37726-5-sj@kernel.org>
Date: Thu, 20 Feb 2025 11:46:42 -0800
From: SeongJae Park <sj@...nel.org>
To: 
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 4/8] mm/damon/core: expose damos_filter_for_ops() to DAMON kernel API callers

damos_filter_for_ops() can be useful to avoid putting wrong type of
filters in wrong place.  Make it be exposed to DAMON kernel API callers.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 include/linux/damon.h | 1 +
 mm/damon/core.c       | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 1d8479f57f85..085f26a2e702 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -846,6 +846,7 @@ void damon_update_region_access_rate(struct damon_region *r, bool accessed,
 struct damos_filter *damos_new_filter(enum damos_filter_type type,
 		bool matching, bool allow);
 void damos_add_filter(struct damos *s, struct damos_filter *f);
+bool damos_filter_for_ops(enum damos_filter_type type);
 void damos_destroy_filter(struct damos_filter *f);
 
 struct damos_quota_goal *damos_new_quota_goal(
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 9744ab9ca5c5..273c91e6df86 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -281,7 +281,14 @@ struct damos_filter *damos_new_filter(enum damos_filter_type type,
 	return filter;
 }
 
-static bool damos_filter_for_ops(enum damos_filter_type type)
+/**
+ * damos_filter_for_ops() - Return if the filter is ops-hndled one.
+ * @type:	type of the filter.
+ *
+ * Return: true if the filter of @type needs to be handled by ops layer, false
+ * otherwise.
+ */
+bool damos_filter_for_ops(enum damos_filter_type type)
 {
 	switch (type) {
 	case DAMOS_FILTER_TYPE_ADDR:
-- 
2.39.5