automated: linux: kselftest: filter skip entries by subsuite

When running a subset of kselftest suites (e.g. kselftest-mm), the
existing skipfile logic still applies all entries from
skipfile-lkft.yaml, including those unrelated to the selected subsuites.
As a result, irrelevant tests (such as those from the breakpoints suite)
appear as "skip" in result.json, even though they were not part of the
test run.

To ensure accurate skip handling, the logic has been updated so that
skip entries only apply to tests within the subsuites selected for the
current run. Each skip entry is parsed to extract the subsuite name,
which is then compared against the entries in TST_CMDFILES. Skip rules
are applied only when a match is found, preventing unrelated tests from
appearing as "skipped" in the results.

This avoids polluting results with unrelated test cases and makes skips
more accurate and meaningful.

Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

Author: roxell

automated/linux/kselftest/kselftest.sh

@@ -189,9 +189,18 @@ cp kselftest-list.txt kselftest-list.txt.orig
 echo "skiplist:"
 echo "========================================"
 while read -r skip_regex; do
-    echo "$skip_regex"
-    # Remove matching tests from list of tests to run and report it as skipped
-    perl -i -ne 'if (s|^('"${skip_regex}"')$|\1 skip|) { print STDERR; } else { print; }' kselftest-list.txt 2>>"${RESULT_FILE}"
+    subsuite="${skip_regex%%:*}"
+
+    # Loop through each subsuite in TST_CMDFILES and compare
+    for selected in ${TST_CMDFILES}; do
+        if [ "${subsuite}" = "${selected}" ]; then
+            echo "$skip_regex"
+            # Remove matching tests from list of tests to run and report it as skipped
+            perl -i -ne 'if (s|^('"${skip_regex}"')$|\1 skip|) { print STDERR; } else { print; }' \
+                kselftest-list.txt 2>>"${RESULT_FILE}"
+            break
+        fi
+    done
 done < "${skips}"
 echo "========================================"
 rm -f "${skips}"