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[24.4.73.83]) by smtp.gmail.com with ESMTPSA id y3sm6135773pjb.18.2021.01.07.08.43.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 07 Jan 2021 08:43:19 -0800 (PST) Sender: Vineet Gupta Subject: Re: ARC no console output (was Re: [PATCH 1/2] init/console: Use ttynull as a fallback when there is no console) To: John Ogness , Petr Mladek , Sergey Senozhatsky , Steven Rostedt Cc: Linus Torvalds , Guenter Roeck , Shreyas Joshi , shreyasjoshi15@gmail.com, Greg Kroah-Hartman , Sergey Senozhatsky , linux-kernel@vger.kernel.org, buildroot@busybox.net, Thomas Petazzoni , linux-arch@vger.kernel.org, arcml Newsgroups: gmane.linux.kernel.cross-arch,gmane.linux.kernel,gmane.linux.kernel.arc References: <20201111135450.11214-1-pmladek@suse.com> <20201111135450.11214-2-pmladek@suse.com> <8735zdm86m.fsf@jogness.linutronix.de> From: Vineet Gupta Message-ID: <50ade852-c598-6476-1f4b-9a3f8d11d143@synopsys.com> Date: Thu, 7 Jan 2021 08:43:16 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <8735zdm86m.fsf@jogness.linutronix.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi John, On 1/7/21 1:02 AM, John Ogness wrote: > Hi Vineet, > > On 2021-01-06, Vineet Gupta wrote: >> This breaks ARC booting (no output on console). > > Could you provide the kernel boot arguments that you use? This series is > partly about addressing users that have used boot arguments that are > technically incorrect (even if had worked). Seeing the boot arguments of > users that are not experiencing problems may help to reveal some of the > unusual console usages until now. Kernel command line: earlycon=uart8250,mmio32,0xf0005000,115200n8 console=ttyS0,115200n8 debug print-fatal-signals=1 And we do have serial driver built-in. Thx, -Vineet