+ mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch added to mm-new branch

+ mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm/damon/tests/core-kunit: remove unnecessary damon_ctx variable on damon_test_split_at()
has been added to the -mm mm-new branch.  Its filename is
     mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/tests/core-kunit: remove unnecessary damon_ctx variable on damon_test_split_at()
Date: Sat, 1 Nov 2025 11:20:15 -0700

damon_test_split_at() dynamically allocates a 'struct damon_ctx' object,
but it is not really being used in the code other than handling the
allocation failure and deallocating it at the end of the function.  Remove
the unnecessary allocation and deallocation of the object.

Link: https://lkml.kernel.org/r/20251101182021.74868-22-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/tests/core-kunit.h |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

--- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at
+++ a/mm/damon/tests/core-kunit.h
@@ -144,20 +144,14 @@ static void damon_test_aggregate(struct
 
 static void damon_test_split_at(struct kunit *test)
 {
-	struct damon_ctx *c = damon_new_ctx();
 	struct damon_target *t;
 	struct damon_region *r, *r_new;
 
-	if (!c)
-		kunit_skip(test, "ctx alloc fail");
 	t = damon_new_target();
-	if (!t) {
-		damon_destroy_ctx(c);
+	if (!t)
 		kunit_skip(test, "target alloc fail");
-	}
 	r = damon_new_region(0, 100);
 	if (!r) {
-		damon_destroy_ctx(c);
 		damon_free_target(t);
 		kunit_skip(test, "region alloc fail");
 	}
@@ -178,7 +172,6 @@ static void damon_test_split_at(struct k
 	KUNIT_EXPECT_EQ(test, r->last_nr_accesses, r_new->last_nr_accesses);
 
 	damon_free_target(t);
-	damon_destroy_ctx(c);
 }
 
 static void damon_test_merge_two(struct kunit *test)
_

Patches currently in -mm which might be from sj@kernel.org are

mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch
mm-zswap-fix-typos-s-zwap-zswap.patch
mm-zswap-s-red-black-tree-xarray.patch
docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch
mm-damon-document-damos_quota_goal-nid-use-case.patch
mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch
mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch
mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch
mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch
mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch
mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch
docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch
docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch
docs-abi-damon-document-damos-quota-goal-path-file.patch
mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch
docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch
docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch
docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch
docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch
docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch
docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch
docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch
mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch
mm-damon-sysfs-test-commit-input-against-realistic-destination.patch
mm-damon-sysfs-implement-obsolete_target-file.patch
docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch
docs-abi-damon-document-obsolete_target-sysfs-file.patch
selftests-damon-_damon_sysfs-support-obsolete_target-file.patch
drgn_dump_damon_status-dump-damon_target-obsolete.patch
sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch
selftests-damon-sysfs-add-obsolete_target-test.patch
mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch
mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch
mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch
mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch
mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch
mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch
mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch
mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch
mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch
mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch
mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch
mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch
mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch
mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch
mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch
mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch
mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch
mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch
mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch
mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch
mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch
mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch