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Date:   Mon, 4 Jan 2021 12:42:27 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH net] docs: net: fix documentation on .ndo_get_stats

On Wed, Dec 30, 2020 at 07:45:24PM -0800, Jakub Kicinski wrote:
> Fix calling context.
> 
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> ---
>  Documentation/networking/netdevices.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/networking/netdevices.rst b/Documentation/networking/netdevices.rst
> index 5a85fcc80c76..a80676f5477d 100644
> --- a/Documentation/networking/netdevices.rst
> +++ b/Documentation/networking/netdevices.rst
> @@ -64,8 +64,8 @@ struct net_device synchronization rules
>  	Context: process
>  
>  ndo_get_stats:
> -	Synchronization: dev_base_lock rwlock.
> -	Context: nominally process, but don't sleep inside an rwlock
> +	Synchronization: rtnl_lock() semaphore, or RCU.
> +	Context: atomic
>  
>  ndo_start_xmit:
>  	Synchronization: __netif_tx_lock spinlock.
> -- 
> 2.26.2
> 

And what happened to dev_base_lock? Did it suddenly go away?

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