linux-kernel - Re: [Nios2-dev] [PATCH 1/2] serial: Add driver for the Altera JTAG UART

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Date:	Thu, 6 May 2010 12:17:00 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Ian Abbott <abbotti@....co.uk>
Cc:	"nios2-dev@...c.et.ntust.edu.tw" <nios2-dev@...c.et.ntust.edu.tw>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"gregkh@...e.de" <gregkh@...e.de>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Nios2-dev] [PATCH 1/2] serial: Add driver for the Altera JTAG
 UART

> I was originally responsible for adding the spin locks to these console
> putc functions, but I'm not sure what the policy is regarding that, as
> the 8250 driver doesn't use them for console output for example.

For the console it depends if you need them for internal consistency as I
understand the codebase. For the core stuff it currently protects
port->port.tty against a hangup which would drop the tty under you.

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