linux-kernel - Re: [PATCH v1] tty: serial: Use GFP_ATOMIC instead of GFP_KERNEL in serial8250_em485

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Date:	Thu, 18 Feb 2016 15:47:18 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	"Matwey V. Kornilov" <matwey@....msu.ru>
Cc:	Andy Shevchenko <andy.shevchenko@...il.com>,
	Jiri Slaby <jslaby@...e.com>,
	Peter Hurley <peter@...leysoftware.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	Ильяс Гасанов 
	<torso.nafi@...il.com>
Subject: Re: [PATCH v1] tty: serial: Use GFP_ATOMIC instead of GFP_KERNEL in
 serial8250_em485_init()

On Thu, Feb 18, 2016 at 11:29:07PM +0300, Matwey V. Kornilov wrote:
> 2016-02-18 23:21 GMT+03:00 Andy Shevchenko <andy.shevchenko@...il.com>:
> > On Thu, Feb 18, 2016 at 8:47 PM, Matwey V. Kornilov <matwey@....msu.ru> wrote:
> >> serial8250_em485_init() is supposed to be protected with
> >> p->port.lock spinlock.
> >> This may lead to issues when kmalloc sleeps, so it is better to use
> >> GFP_ATOMIC in this spinlocked context.
> >>
> >> Fixes: e490c9144cfa ("tty: Add software emulated RS485 support for 8250")
> >> Reported-by: <torso.nafi@...il.com>
> >
> > Hmm... Can't we put Cyrillic characters to tags as name of a person?
> 
> I am afraid non-ASCII will break something eventually. I think it
> would be better to ask Ilias to put his name in proper latin
> transcription here.

Why, we accept non-ASCII names all the time, why would we not do so?

Please fix up and resend.

thansk,

greg k-h