perf test perftool_testsuite: Return correct value for skipping

In 'perf test', a return value 2 represents that the test case was
skipped. Fix this value for perftool_testsuite test cases to
differentiate between skip and pass values.

Signed-off-by: Veronika Molnarova <vmolnaro@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20250113182605.130719-3-vmolnaro@redhat.com
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/base_probe/test_adding_blacklisted.sh

@@ -22,7 +22,7 @@ TEST_RESULT=0
 BLACKFUNC_LIST=`head -n 5 /sys/kernel/debug/kprobes/blacklist 2> /dev/null | cut -f2`
 if [ -z "$BLACKFUNC_LIST" ]; then
 	print_overall_skipped
-	exit 0
+	exit 2
 fi
 
 # try to find vmlinux with DWARF debug info

tools/perf/tests/shell/base_probe/test_adding_kernel.sh

@@ -33,7 +33,7 @@ fi
 check_kprobes_available
 if [ $? -ne 0 ]; then
 	print_overall_skipped
-	exit 0
+	exit 2
 fi
 
 

tools/perf/tests/shell/base_probe/test_basic.sh

@@ -19,7 +19,7 @@ TEST_RESULT=0
 
 if ! check_kprobes_available; then
 	print_overall_skipped
-	exit 0
+	exit 2
 fi
 
 

tools/perf/tests/shell/base_probe/test_invalid_options.sh

@@ -19,7 +19,7 @@ TEST_RESULT=0
 
 if ! check_kprobes_available; then
 	print_overall_skipped
-	exit 0
+	exit 2
 fi
 
 # Check for presence of DWARF

tools/perf/tests/shell/base_probe/test_line_semantics.sh

@@ -20,7 +20,7 @@ TEST_RESULT=0
 
 if ! check_kprobes_available; then
 	print_overall_skipped
-	exit 0
+	exit 2
 fi
 
 # Check for presence of DWARF

tools/perf/tests/shell/common/init.sh

@@ -88,7 +88,7 @@ consider_skipping()
 	# the runmode of a testcase needs to be at least the current suite's runmode
 	if [ $PERFTOOL_TESTSUITE_RUNMODE -lt $TESTCASE_RUNMODE ]; then
 		print_overall_skipped
-		exit 0
+		exit 2
 	fi
 }