linux-kernel - [PATCH v2 1/2] mm/damon: Move has filter to ops-common

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Message-ID: <06734aa15198e542f9defbc1d29fc0731671c3d8.1753895066.git.pyyjason@gmail.com>
Date: Wed, 30 Jul 2025 10:19:55 -0700
From: Yueyang Pan <pyyjason@...il.com>
To: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Usama Arif <usamaarif642@...il.com>
Cc: damon@...ts.linux.dev,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] mm/damon: Move has filter to ops-common

This patch moves damon_pa_scheme_has_filter to ops-common. renaming
to damon_scheme_has_filter.
Doing so allows us to reuse its logic in the vaddr version
of DAMOS_STAT

Signed-off-by: Yueyang Pan <pyyjason@...il.com>
---
 mm/damon/ops-common.c |  9 +++++++++
 mm/damon/ops-common.h |  2 ++
 mm/damon/paddr.c      | 11 +----------
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
index 99321ff5cb92..3ebfa356ca46 100644
--- a/mm/damon/ops-common.c
+++ b/mm/damon/ops-common.c
@@ -412,3 +412,12 @@ unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid)
 
 	return nr_migrated;
 }
+
+bool damon_scheme_has_filter(struct damos *s)
+{
+	struct damos_filter *f;
+
+	damos_for_each_ops_filter(f, s)
+		return true;
+	return false;
+}
diff --git a/mm/damon/ops-common.h b/mm/damon/ops-common.h
index 61ad54aaf256..8d5c5c7631ac 100644
--- a/mm/damon/ops-common.h
+++ b/mm/damon/ops-common.h
@@ -21,3 +21,5 @@ int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
 
 bool damos_folio_filter_match(struct damos_filter *filter, struct folio *folio);
 unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid);
+
+bool damon_scheme_has_filter(struct damos *s);
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 53a55c5114fb..daeceed981a0 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -262,22 +262,13 @@ static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
 	return applied * PAGE_SIZE;
 }
 
-static bool damon_pa_scheme_has_filter(struct damos *s)
-{
-	struct damos_filter *f;
-
-	damos_for_each_ops_filter(f, s)
-		return true;
-	return false;
-}
-
 static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
 		unsigned long *sz_filter_passed)
 {
 	unsigned long addr;
 	struct folio *folio;
 
-	if (!damon_pa_scheme_has_filter(s))
+	if (!damon_scheme_has_filter(s))
 		return 0;
 
 	addr = r->ar.start;
-- 
2.47.3