From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-184.mta0.migadu.com (out-184.mta0.migadu.com [91.218.175.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D16D3955F4 for ; Tue, 21 Jul 2026 15:54:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.184 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784649268; cv=none; b=njnEvWsWrm1dRoHWbf+HJbWE/t9FYuGp89Jus7+jc76OvheWGas8H0LpWirPtEOOmVAXXUBvNrck2dmUsTR1nRDZq65Y1ODnCyxtbYfc/TtqqRxDwJ2/437HS7ZwbQB8HQmaIHWxg8v/1Sz/uYQ0EIwIlmY2xdhWbhbif/nm63w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784649268; c=relaxed/simple; bh=JHaC0T74RoJZv3853lnA3pAICDFedlLnY3QaJtTc/5s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=YBjVEzZKYFoHNvKHIeFLUlfWFmiquTxiAbQDPGiRO2fKEOHEr7jQ2gu1kLP6nf3IWryIl9P1ry9NgDulcwGdEkoZB4/1tyTRSqn5o/ySseOvVW+gEzxnDyLpMhEXXds0JnVruRq2UpjFrtHJxXATj0NkFztFzhSaeYHRQI/Pe5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=uONLQzEw; arc=none smtp.client-ip=91.218.175.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="uONLQzEw" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1784649264; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=PHsLbISyxDzDV5B3VfZ3nuHc5ydt3zfq0bmim3PoWyk=; b=uONLQzEwQuuB7jHolqPSohqpzTanqIuIDPr0SFP038eeTSfeRBZ6O2x+NOIHzW3udWayKP WKFFBO9P9ELSgGi+u4wESXq2Rvp184TECPp1UPIPXTrvyL4dDE+9/LMpBRoRLqc2nKphtw KesiMtuWJEtxzrjdw+UebLvlEM9vNsI= From: Thorsten Blum To: Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Aboorva Devarajan Cc: Thorsten Blum , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] powerpc/powernv: Avoid strlen() in pnv_restart() Date: Tue, 21 Jul 2026 17:53:45 +0200 Message-ID: <20260721155346.121975-3-thorsten.blum@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=761; i=thorsten.blum@linux.dev; h=from:subject; bh=JHaC0T74RoJZv3853lnA3pAICDFedlLnY3QaJtTc/5s=; b=owGbwMvMwCUWt7pQ4caZUj3G02pJDFnx07iWR/CKmx0I99l6MGR1aUvooWXntu56ulljy+Vox gtGHYeyO0pZGMS4GGTFFFkezPoxw7e0pnKTScROmDmsTCBDGLg4BWAiP+8z/E/YpaMim/npy+Sd 6VeirxVsnM/Icuq0pSTTyTn+J2PT6toYGZbr38hvbrjS86zraf66QzenZfpKWzGGxwYHiwfJmHR 58gMA X-Developer-Key: i=thorsten.blum@linux.dev; a=openpgp; fpr=1D60735E8AEF3BE473B69D84733678FD8DFEEAD4 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Check only the first byte instead of scanning the entire string with strlen(). Signed-off-by: Thorsten Blum --- arch/powerpc/platforms/powernv/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 06ed5e2aa265..2af92e7ba4ee 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -312,7 +312,7 @@ static void __noreturn pnv_restart(char *cmd) pnv_prepare_going_down(); do { - if (!cmd || !strlen(cmd)) + if (!cmd || *cmd == '\0') rc = opal_cec_reboot(); else if (strcmp(cmd, "full") == 0) rc = opal_cec_reboot2(OPAL_REBOOT_FULL_IPL, NULL);