From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="C/ZEMiJF" Received: from mail-ot1-x331.google.com (mail-ot1-x331.google.com [IPv6:2607:f8b0:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 603D512C for ; Tue, 21 Nov 2023 09:58:31 -0800 (PST) Received: by mail-ot1-x331.google.com with SMTP id 46e09a7af769-6cd1918afb2so3862242a34.0 for ; Tue, 21 Nov 2023 09:58:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1700589510; x=1701194310; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=77qERLs0OaQrBVtVqKqY8REeDJgJr05nxeZrsBFakuY=; b=C/ZEMiJFlpYDHxuW1leUupyS6vNzdkfSumXePhGeFDhDCLK1cdurDgDjkbAhPXNUdR qkMPqpti0sv8HqkMMkuHCSYzgNvFI0Ov90tBF4Nv6cg5+5OqPKZXvlTRuq9K+WbzYN5k WMvrVAd5hyRH07yloQ5Oy095mdEMhN2JY5mXdGF9lG4G9LABX5tSNMEsaz38TfU7Sh9J 5cbpvt0c92/hkvgReLQ9ijmal1MfBpcJEVdZP89dgqYwOHpNzxNhrva/oCM8Zk9zYnoO zBoqtlosoI7ovoSMcVOjXLZNV6ag4AhMV/oE/HzcRuLUAhMhWr7Th3SZ2Dqq+Mst6+wy +q7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700589510; x=1701194310; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=77qERLs0OaQrBVtVqKqY8REeDJgJr05nxeZrsBFakuY=; b=VMrJsGsGOnubyVElCEE4o68c/ldP6e8/NHMoeJ40fzNhPGasDovK+8EfLcRGrpTGKQ 11OStO17ciAiy+cwr6Xqg30cYsz93sn0jQF217oh6GTbB0UTsJ+Zx2acBkG1oNMVIatO BHhZrpvKVihusZmdQNenZp7/tM07mlDccKZ6Reu5Pe0uhd0CVpfQnDLhPYohBjyozHyN jXgWAz4A51BJQ9Q/02jwGdS46TUa6ey4wjKLh/mU508uYBk9HtBzE46DeeYUIGlQpofV RGeDf/yKsEYbGXdBeqOd9MHpPghMhT0Jfyr8vnOic5MtvR1pmowExVayZFOSnyHihGi0 o1Xg== X-Gm-Message-State: AOJu0Yz9CWKJrQDQV+ah9TXQtSssRt/fHz3FWZMHDRSJrTAZjXbPr6gN OnW+wpCRDbBWGV+TzYg0KjKdjA== X-Google-Smtp-Source: AGHT+IH2kHEJhg1L+w3IKpHNOng3FayS3H19pAQ9FtKcBKGQIPjhcoraxZrC/R/qsT/fQHVTmFyF/Q== X-Received: by 2002:a05:6870:46a9:b0:1e9:b0fa:de48 with SMTP id a41-20020a05687046a900b001e9b0fade48mr7101338oap.47.1700589510707; Tue, 21 Nov 2023 09:58:30 -0800 (PST) Received: from [172.20.7.39] ([187.217.227.247]) by smtp.gmail.com with ESMTPSA id j25-20020a9d7699000000b006b74bea76c0sm1648610otl.47.2023.11.21.09.58.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Nov 2023 09:58:30 -0800 (PST) Message-ID: <885063ee-b0da-42cc-b836-da2117d4d3aa@linaro.org> Date: Tue, 21 Nov 2023 11:58:27 -0600 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 17/17] tty: srmcons: make 'str_cr' const and non-array Content-Language: en-US To: "Jiri Slaby (SUSE)" , gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Ivan Kokshaysky , Matt Turner , linux-alpha@vger.kernel.org References: <20231121092258.9334-1-jirislaby@kernel.org> <20231121092258.9334-18-jirislaby@kernel.org> From: Richard Henderson In-Reply-To: <20231121092258.9334-18-jirislaby@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Level: * On 11/21/23 03:22, Jiri Slaby (SUSE) wrote: > 'str_cr' contains a single character: \n. There is no need to declare it > as array. Declare it as a variable, make it const and pass a pointer to > it to callback_puts(). > > Signed-off-by: Jiri Slaby (SUSE) > Cc: Richard Henderson > Cc: Ivan Kokshaysky > Cc: Matt Turner > Cc: linux-alpha@vger.kernel.org > --- > arch/alpha/kernel/srmcons.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c > index c6b821afbfd3..a6cff61706b5 100644 > --- a/arch/alpha/kernel/srmcons.c > +++ b/arch/alpha/kernel/srmcons.c > @@ -91,7 +91,7 @@ srmcons_receive_chars(struct timer_list *t) > static void > srmcons_do_write(struct tty_port *port, const char *buf, int count) > { > - static char str_cr[1] = "\r"; > + static const char str_cr = '\r'; Best to remove this entirely... > size_t c; > srmcons_result result; > > @@ -119,7 +119,7 @@ srmcons_do_write(struct tty_port *port, const char *buf, int count) > } > > while (need_cr) { > - result.as_long = callback_puts(0, str_cr, 1); > + result.as_long = callback_puts(0, &str_cr, 1); ... and simply use "\r" here. Logically it adds one '\0' of const data, but it is virtually certain that even more bytes of padding are present anyway. As a string literal it will be placed into .rodata.str1.1 and packed with other strings. r~