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

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Message-ID: <CAHp75VdLfOpsA-owMzOTJoo_iFmWiJjzC1p-NaqRO9LHcWu1Pg@mail.gmail.com>
Date:	Thu, 18 Feb 2016 22:21:54 +0200
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	"Matwey V. Kornilov" <matwey@....msu.ru>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	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>
Subject: Re: [PATCH v1] tty: serial: Use GFP_ATOMIC instead of GFP_KERNEL in serial8250_em485_init()

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?

-- 
With Best Regards,
Andy Shevchenko