From: Greg KH <greg@kroah.com>
To: Johan Hovold <johan@kernel.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Davidlohr Bueso <dave@stgolabs.net>
Subject: Re: [PATCH] USB: serial: relax unthrottle memory barrier
Date: Thu, 30 Jan 2020 11:23:00 +0100 [thread overview]
Message-ID: <20200130102300.GA927405@kroah.com> (raw)
In-Reply-To: <20200130100658.683-1-johan@kernel.org>
On Thu, Jan 30, 2020 at 11:06:58AM +0100, Johan Hovold wrote:
> Commit a8d78d9f3856 ("USB: serial: clean up throttle handling")
> converted the throttle handling to use atomic bitops. This means that we
> can relax the smp_mb() in unthrottle() to smp_mb__after_atomic(), which
> for example is a no-op on architectures like x86 that provide fully
> ordered atomics.
>
> Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
next prev parent reply other threads:[~2020-01-30 10:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-30 10:06 [PATCH] USB: serial: relax unthrottle memory barrier Johan Hovold
2020-01-30 10:23 ` Greg KH [this message]
2020-01-30 15:33 ` Davidlohr Bueso
2020-02-10 9:38 ` Johan Hovold
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