From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA824C43387 for ; Wed, 9 Jan 2019 19:34:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 75CA021738 for ; Wed, 9 Jan 2019 19:34:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547062454; bh=JxZjdzxU9dPfH8Izpe7tH+yiYoEsJ0jMaB3DYoHF/RM=; h=Subject:From:To:Cc:Date:List-ID:From; b=kerI1aJns1vJ/Jt8IjWECQjHYDL4mV2O0ryU3xxKTMFycXpETrNQhiLE1XTNFJs1x XTP0NkYOC+Hp76RzkiOX9aIC5+lofkBc9dtR1KgQUSwOpX31pX9cZXeidsuVyRaIP8 Vg4N4bdGyIgFgODRUwLnfSANNpI1qKW5gHRytNec= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728331AbfAITeN (ORCPT ); Wed, 9 Jan 2019 14:34:13 -0500 Received: from mail.kernel.org ([198.145.29.99]:38240 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727770AbfAITeN (ORCPT ); Wed, 9 Jan 2019 14:34:13 -0500 Received: from tzanussi-mobl (c-98-220-238-81.hsd1.il.comcast.net [98.220.238.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5374A206BA; Wed, 9 Jan 2019 19:34:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547062452; bh=JxZjdzxU9dPfH8Izpe7tH+yiYoEsJ0jMaB3DYoHF/RM=; h=Subject:From:To:Cc:Date:From; b=CV8KGQ4fyjP/FLPyR62vxFQUx6M7unXolKoe4t2mKMkkhmFVm08EAU0fu1qGZ0UrW fO+492InpVCo8z8dBlROa9yQPMn2a6oFlk+NxWF/Ko1QDVUxn6rbmKQHgdjvUtDoY8 aFcHMnLnj2yPeDxngd0lHmeHaID5TZOJOOCM8Vx8= Message-ID: <1547062451.6258.7.camel@kernel.org> Subject: [PATCH] tracing: Use str_has_prefix() in synth_event_create() From: Tom Zanussi To: rostedt@goodmis.org Cc: mhiramat@kernel.org, linux-kernel@vger.kernel.org Date: Wed, 09 Jan 2019 13:34:11 -0600 Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.1-1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since we now have a str_has_prefix() that returns the length, we can use that instead of explicitly calculating it. Signed-off-by: Tom Zanussi --- kernel/trace/trace_events_hist.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 449d90cfa151..625725ae262f 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -1200,8 +1200,7 @@ static int synth_event_create(int argc, const char **argv) /* This interface accepts group name prefix */ if (strchr(name, '/')) { - len = sizeof(SYNTH_SYSTEM "/") - 1; - if (strncmp(name, SYNTH_SYSTEM "/", len)) + if ((len = str_has_prefix(name, SYNTH_SYSTEM "/")) == 0) return -EINVAL; name += len; } -- 2.14.1