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Date:   Thu, 12 Jul 2018 09:08:22 -0600
From:   Tycho Andersen <>
To:     Greg Kroah-Hartman <>
Cc:     Jiri Slaby <>,,, "Serge E . Hallyn" <>
Subject: Re: [PATCH v4] uart: fix race between uart_put_char() and

On Thu, Jul 12, 2018 at 05:04:38PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Jul 11, 2018 at 10:07:44AM -0600, Tycho Andersen wrote:
> > +	if (uport)
> > +		spin_lock_irqsave(&uport->lock, flags);
> That's the same thing as just calling uart_port_lock(), why aren't you
> doing that?

Because the compiler can't seem to "see" through the macros/ref calls,
and I get the warning I mentioned here if I use them:


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