From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 BF1B213AA2A; Fri, 11 Jul 2025 05:04:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752210241; cv=none; b=olSJUmKF3g6SU2lfzG3GHT/G1KlLQo+Ycoq/rM7OhKioEuhk3YoHEzO32setk1UZXfGWciChOfIQ7WDjqOAT6/E/3iNA0wv8zOpNmPthdFrJiCDK83DF91/RoBd5TN4s10kACdPqMY2KwE6RqpZgnqDwy11RlieTkBXsZILN0ZI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752210241; c=relaxed/simple; bh=eGnnVvjA7Y/ogNo12DXuvd94kJtENaPXUWxRx5er6gU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=nT2SQFMyMnCD3Bc15ia4a4T1idR8OpmIew9s1Aa9MwmRKXOZ35q6Tnpin1fVCQKZfCIgIsl0tN2AZJWNhKZBkFvZlgccj08pecw/A/mDq2/ThNCe0dTpYTCgyIMQs9/g34uoJnbH+4HkpiHsU1DWQr7xyAuRYmBG7uze2TqrwS4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PMnVt5Zg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PMnVt5Zg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BD0E0C4CEEF; Fri, 11 Jul 2025 05:03:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752210240; bh=eGnnVvjA7Y/ogNo12DXuvd94kJtENaPXUWxRx5er6gU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=PMnVt5ZgsLyK4nwhWpR4JhL504Vc1UZwEVtfcID4XQTswlsmoGtm31YRZl+fYqtcH msGzcFPK07/KDUIM+CLwp1RSwZstRHCYpcDGRgrqKCw+XTrdpivbJ5wSXK2fly/odi SKP7znH4dCC5nQtYem02jDBGjccpOriS149eHBrZxcfATJSx3GHh3jqfA5QJ1xH/YN 1Sb2tec6M96MP7HUQZ6QnRFuQdhrb8C3bUz+7xzUQoXfjjbagf5NGT2ODeI50ncdHF ZFSfRNdmA4Wt+xLqB1XnbTx+iBhuXoknQk0pc2TX+Jwy4D0xC3oc78eZtPz3zjWG7K b5GhHmrUZqGKw== Message-ID: Date: Fri, 11 Jul 2025 07:03:56 +0200 Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] serial: 8250_ni: Fix build warning To: Chaitanya Vadrevu , gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, kernel test robot , Jason Smith , Gratian Crisan References: <20250710223838.2657261-1-chaitanya.vadrevu@emerson.com> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11. 07. 25, 0:38, Chaitanya Vadrevu wrote: > Allocate memory on heap instead of stack to fix following warning that > clang version 20.1.2 produces on W=1 build. > > drivers/tty/serial/8250/8250_ni.c:277:12: warning: stack frame size (1072) exceeds limit (1024) in 'ni16550_probe' [-Wframe-larger-than] Hmm, OK: $ pahole -sy uart_8250_port drivers/tty/serial/8250/8250_port.o uart_8250_port 784 4 That's quite a few. I am not sure why we did not see this earlier? Perhaps because CONFIG_FRAME_WARN is set higher for most use/compilation cases. Should we switch all probes? I have a patchset to move ops to a separate struct (pointer), but that's far from finished and it does not save that much: uart_8250_port 624 4 Another question is if we can introduce some lightweight struct for register instead of full uart_8250_port which is copied from (and only small part of it). So perhaps: Reviewed-by: Jiri Slaby thanks, -- js suse labs