selftests/damon/sysfs.sh: test addr_unit file existence

sysfs.sh DAMON selftest is not testing the existence of addr_unit sysfs
file.  Add the test.

Link: https://lore.kernel.org/20260522154026.80546-14-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/damon/sysfs.sh b/tools/testing/selftests/damon/sysfs.sh
index b3418214ed3589ee9980dc42fee5bd2f577aa746..92b44c86818af9beeda3c4de2ee5e1a0b1439a71 100755 (executable)
--- a/tools/testing/selftests/damon/sysfs.sh
+++ b/tools/testing/selftests/damon/sysfs.sh
@@ -365,6 +365,7 @@ test_context()
        ensure_dir "$context_dir" "exist"
        ensure_file "$context_dir/avail_operations" "exit" 400
        ensure_file "$context_dir/operations" "exist" 600
+       ensure_file "$context_dir/addr_unit" "exist" 600
        test_monitoring_attrs "$context_dir/monitoring_attrs"
        test_targets "$context_dir/targets"
        test_schemes "$context_dir/schemes"