netdev - Re: [RFCv2 net-next 000/167] net: extend the netdev_features

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Date:   Thu, 27 Jan 2022 11:16:07 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Jian Shen <shenjian15@...wei.com>
Cc:     davem@...emloft.net, kuba@...nel.org, andrew@...n.ch,
        hkallweit1@...il.com, netdev@...r.kernel.org,
        linuxarm@...neuler.org
Subject: Re: [RFCv2 net-next 000/167] net: extend the netdev_features_t

On Wed, Sep 29, 2021 at 11:50:47PM +0800, Jian Shen wrote:
> For the prototype of netdev_features_t is u64, and the number
> of netdevice feature bits is 64 now. So there is no space to
> introduce new feature bit.
> 
> This patchset try to solve it by change the prototype of
> netdev_features_t from u64 to bitmap. With this change,
> it's necessary to introduce a set of bitmap operation helpers
> for netdev features. Meanwhile, the functions which use
> netdev_features_t as return value are also need to be changed,
> return the result as an output parameter.
> 
> With above changes, it will affect hundreds of files, and all the
> nic drivers. To make it easy to be reviewed, split the changes
> to 167 patches to 5 parts.
> 
> patch 1~22: convert the prototype which use netdev_features_t
> as return value
> patch 24: introduce fake helpers for bitmap operation
> patch 25~165: use netdev_feature_xxx helpers
> patch 166: use macro __DECLARE_NETDEV_FEATURE_MASK to replace
> netdev_feature_t declaration.
> patch 167: change the type of netdev_features_t to bitmap,
> and rewrite the bitmap helpers.
> 
> Sorry to send a so huge patchset, I wanna to get more suggestions
> to finish this work, to make it much more reviewable and feasible.
> 
> The former discussing for the changes, see [1]
> [1]. https://www.spinics.net/lists/netdev/msg753528.html
> 

------------------------------------------------

Is anyone actively working on this task?

Thanks