linux-kernel - Re: [PATCH] bluetooth/{bnep,cmtp,hidp}: Remove unnecessary smp_mb__{before,after}

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Date:   Tue, 21 Aug 2018 16:55:47 +0200
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Andrea Parri <andrea.parri@...rulasolutions.com>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        Brian Norris <briannorris@...omium.org>,
        AL Yu-Chen Cho <acho@...e.com>
Subject: Re: [PATCH] bluetooth/{bnep,cmtp,hidp}: Remove unnecessary
 smp_mb__{before,after}_atomic

Hi Andrea,

> The barriers are unneeded; wait_woken() and woken_wake_function()
> already provide us with the required synchronization: remove them
> and document that we're relying on the (implicit) synchronization
> provided by wait_woken() and woken_wake_function().
> 
> Signed-off-by: Andrea Parri <andrea.parri@...rulasolutions.com>
> ---
> net/bluetooth/bnep/core.c |  7 ++++---
> net/bluetooth/cmtp/core.c | 14 ++++++++------
> net/bluetooth/hidp/core.c | 13 ++++++++-----
> 3 files changed, 20 insertions(+), 14 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel