On Thu, 15 Sep 2016 23:19:51 +0300, Ran Shalit said: > Isn't writing to console, the same as outputing chars to serial ?
No. For instance, consider any laptop where "console" is an LCD screen, and if it's recent hardware, there isn't a UART anywhere in the device, nor is there a serial port to connect to. Or any system where virtual terminals are in the config, for that matter. Then there's netconsole, console-over-USB, and heaven knows what other variations. See Documentation/console/console.txt for more information.
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