[merged mm-stable] selftests-damon-_damon_sysfs-skip-testcases-if-config_damon_sysfs-is-disabled.patch removed from -mm tree

[merged mm-stable] selftests-damon-_damon_sysfs-skip-testcases-if-config_damon_sysfs-is-disabled.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/damon/_damon_sysfs: skip testcases if CONFIG_DAMON_SYSFS is disabled
has been removed from the -mm tree.  Its filename was
     selftests-damon-_damon_sysfs-skip-testcases-if-config_damon_sysfs-is-disabled.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Enze Li <lienze@kylinos.cn>
Subject: selftests/damon/_damon_sysfs: skip testcases if CONFIG_DAMON_SYSFS is disabled
Date: Sat, 31 May 2025 17:39:37 +0800

When CONFIG_DAMON_SYSFS is disabled, the selftests fail with the following
outputs,

not ok 2 selftests: damon: sysfs_update_schemes_tried_regions_wss_estimation.py # exit=1
not ok 3 selftests: damon: damos_quota.py # exit=1
not ok 4 selftests: damon: damos_quota_goal.py # exit=1
not ok 5 selftests: damon: damos_apply_interval.py # exit=1
not ok 6 selftests: damon: damos_tried_regions.py # exit=1
not ok 7 selftests: damon: damon_nr_regions.py # exit=1
not ok 11 selftests: damon: sysfs_update_schemes_tried_regions_hang.py # exit=1

The root cause of this issue is that all the testcases above do not check
the sysfs interface of DAMON whether it exists or not.  With this patch
applied, all the testcases above now pass successfully.

Link: https://lkml.kernel.org/r/20250531093937.1555159-1-lienze@kylinos.cn
Signed-off-by: Enze Li <lienze@kylinos.cn>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/damon/_damon_sysfs.py |    4 ++++
 1 file changed, 4 insertions(+)

--- a/tools/testing/selftests/damon/_damon_sysfs.py~selftests-damon-_damon_sysfs-skip-testcases-if-config_damon_sysfs-is-disabled
+++ a/tools/testing/selftests/damon/_damon_sysfs.py
@@ -15,6 +15,10 @@ if sysfs_root is None:
     print('Seems sysfs not mounted?')
     exit(ksft_skip)
 
+if not os.path.exists(sysfs_root):
+    print('Seems DAMON disabled?')
+    exit(ksft_skip)
+
 def write_file(path, string):
     "Returns error string if failed, or None otherwise"
     string = '%s' % string
_

Patches currently in -mm which might be from lienze@kylinos.cn are