linux-kernel - [PATCH] selftests: timers: suppress "cd" output from run_destructive

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Date:   Tue, 22 Aug 2017 13:11:07 -0600
From:   Shuah Khan <shuahkh@....samsung.com>
To:     john.stultz@...aro.org, shuah@...nel.org
Cc:     Shuah Khan <shuahkh@....samsung.com>, tglx@...utronix.de,
        sboyd@...eaurora.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] selftests: timers: suppress "cd" output from run_destructive_tests target

Suppress "cd" output from run_destructive_tests while running tests to
declutter the test results.

Running timers run_destructive_tests:
make --silent -C tools/testing/selftests/timers run_destructive_tests

Before the change:

/lkml/linux_4.13/tools/testing/selftests/timers
ntpd: no process found
Maybe you're not running as root?
selftests:  change_skew [FAIL]
/lkml/linux_4.13/tools/testing/selftests/timers

After the change:

ntpd: no process found
Maybe you're not running as root?
selftests:  change_skew [FAIL]

Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
 tools/testing/selftests/timers/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 6c1327278d5f..4ed9e45c7f38 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -20,7 +20,7 @@ define RUN_DESTRUCTIVE_TESTS
 			echo "selftests: Warning: file $$BASENAME_TEST is not executable, correct this.";\
 			echo "selftests: $$BASENAME_TEST [FAIL]"; \
 		else					\
-			cd `dirname $$TEST`; (./$$BASENAME_TEST && echo "selftests: $$BASENAME_TEST [PASS]") || echo "selftests:  $$BASENAME_TEST [FAIL]"; cd -;\
+			cd `dirname $$TEST` > /dev/null; (./$$BASENAME_TEST && echo "selftests: $$BASENAME_TEST [PASS]") || echo "selftests:  $$BASENAME_TEST [FAIL]"; cd - > /dev/null;\
 		fi;					\
 	done;
 endef
-- 
2.11.0