[RFC PATCH 05/10] mm/damon: add pass argument to damos_new_filter()

[SeongJae Park <sj@kernel.org>]

damos_new_filter() sets damos_filter->pass as false always.  The API
users hence should manually set the field to use the filter as a pass
filter.  It is cumbersome and easy to mistake.  Add an arugment for
setting the field to damos_new_filter().

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 include/linux/damon.h       | 2 +-
 mm/damon/core.c             | 7 ++++---
 mm/damon/paddr.c            | 3 ++-
 mm/damon/reclaim.c          | 2 +-
 mm/damon/sysfs-schemes.c    | 2 +-
 mm/damon/tests/core-kunit.h | 4 ++--
 6 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 122c30e4ce19..ad0360711aca 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -801,7 +801,7 @@ void damon_update_region_access_rate(struct damon_region *r, bool accessed,
 		struct damon_attrs *attrs);
 
 struct damos_filter *damos_new_filter(enum damos_filter_type type,
-		bool matching);
+		bool matching, bool pass);
 void damos_add_filter(struct damos *s, struct damos_filter *f);
 void damos_destroy_filter(struct damos_filter *f);
 
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 71db2c754e6d..13f12d82de5f 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -266,7 +266,7 @@ int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
 }
 
 struct damos_filter *damos_new_filter(enum damos_filter_type type,
-		bool matching)
+		bool matching, bool pass)
 {
 	struct damos_filter *filter;
 
@@ -275,7 +275,7 @@ struct damos_filter *damos_new_filter(enum damos_filter_type type,
 		return NULL;
 	filter->type = type;
 	filter->matching = matching;
-	filter->pass = false;
+	filter->pass = pass;
 	INIT_LIST_HEAD(&filter->list);
 	return filter;
 }
@@ -806,7 +806,8 @@ static int damos_commit_filters(struct damos *dst, struct damos *src)
 			continue;
 
 		new_filter = damos_new_filter(
-				src_filter->type, src_filter->matching);
+				src_filter->type, src_filter->matching,
+				src_filter->pass);
 		if (!new_filter)
 			return -ENOMEM;
 		damos_commit_filter_arg(new_filter, src_filter);
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 71cb02128b46..cd89500efc22 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -259,7 +259,8 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s,
 		}
 	}
 	if (install_young_filter) {
-		filter = damos_new_filter(DAMOS_FILTER_TYPE_YOUNG, true);
+		filter = damos_new_filter(
+				DAMOS_FILTER_TYPE_YOUNG, true, false);
 		if (!filter)
 			return 0;
 		damos_add_filter(s, filter);
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 9e0077a9404e..a675150965e0 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -221,7 +221,7 @@ static int damon_reclaim_apply_parameters(void)
 	}
 
 	if (skip_anon) {
-		filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true);
+		filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, false);
 		if (!filter)
 			goto out;
 		damos_add_filter(scheme, filter);
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index deeaf23c1fcf..9a883e8aea1c 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -1901,7 +1901,7 @@ static int damon_sysfs_add_scheme_filters(struct damos *scheme,
 			sysfs_filters->filters_arr[i];
 		struct damos_filter *filter =
 			damos_new_filter(sysfs_filter->type,
-					sysfs_filter->matching);
+					sysfs_filter->matching, false);
 		int err;
 
 		if (!filter)
diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h
index 8f58d3424c21..532c6a6f21f9 100644
--- a/mm/damon/tests/core-kunit.h
+++ b/mm/damon/tests/core-kunit.h
@@ -411,7 +411,7 @@ static void damos_test_new_filter(struct kunit *test)
 {
 	struct damos_filter *filter;
 
-	filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true);
+	filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, false);
 	KUNIT_EXPECT_EQ(test, filter->type, DAMOS_FILTER_TYPE_ANON);
 	KUNIT_EXPECT_EQ(test, filter->matching, true);
 	KUNIT_EXPECT_PTR_EQ(test, filter->list.prev, &filter->list);
@@ -425,7 +425,7 @@ static void damos_test_filter_out(struct kunit *test)
 	struct damon_region *r, *r2;
 	struct damos_filter *f;
 
-	f = damos_new_filter(DAMOS_FILTER_TYPE_ADDR, true);
+	f = damos_new_filter(DAMOS_FILTER_TYPE_ADDR, true, false);
 	f->addr_range = (struct damon_addr_range){
 		.start = DAMON_MIN_REGION * 2, .end = DAMON_MIN_REGION * 6};
 
-- 
2.39.5