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This reverts commit31c2e369b5which is commitb5734e997eupstream. The reverted commit belongs to patchset which updated synthetic event command parsing and testcase 'trigger-synthetic_event_syntax_errors.tc' Link: https://lore.kernel.org/all/20210211020950.102294806@goodmis.org/ However this testcase update was backported alone without feature update, which makes the testcase cannot pass on stable branch. Revert this commit to make the testcase correct. Fixes:31c2e369b5("selftests/ftrace: Update synthetic event syntax errors") Reported-by: Chen Zhongjin <chenzhongjin@huawei.com> Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>