linux-kernel - Re: + s390-tty-prepare-for-put_char-to-return-success-fail.patch added to -mm tree

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Message-ID: <20080415111101.41b6e9e3@core>
Date:	Tue, 15 Apr 2008 11:11:01 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, alan@...hat.com,
	borntraeger@...ibm.com, peter.oberparleiter@...ibm.com,
	schwidefsky@...ibm.com, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: + s390-tty-prepare-for-put_char-to-return-success-fail.patch
 added to -mm tree

> is allowed or not (1 means yes). Somebody told me that the put_char routine
> will only be called from schedulable context, which now doesn't seem to be
> true?!

It isnt true.

> For the console functions we pass indeed 0 to __sclp_vt220_write since printk
> may be called within any context. Is that also true for the tty put_char
> routine?

Yes, but failing a put_char is perfectly acceptable.

Alan
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