From: "shenjian (K)" <shenjian15@huawei.com>
To: Jakub Kicinski <kuba@kernel.org>,
Alexander Lobakin <alexandr.lobakin@intel.com>
Cc: <davem@davemloft.net>, <andrew@lunn.ch>, <ecree.xilinx@gmail.com>,
<hkallweit1@gmail.com>, <saeed@kernel.org>, <leon@kernel.org>,
<netdev@vger.kernel.org>, <linuxarm@openeuler.org>
Subject: Re: [RFCv7 PATCH net-next 36/36] net: redefine the prototype of netdev_features_t
Date: Fri, 12 Aug 2022 19:43:02 +0800 [thread overview]
Message-ID: <9ee936ee-ae94-6c71-2ca5-e8d349bc9b97@huawei.com> (raw)
In-Reply-To: <20220811081311.0f549b39@kernel.org>
在 2022/8/11 23:13, Jakub Kicinski 写道:
> On Thu, 11 Aug 2022 15:07:57 +0200 Alexander Lobakin wrote:
>
>>> Yes, Jakub also mentioned this.
>>>
>>> But there are many existed features interfaces(e.g. ndo_fix_features,
>>> ndo_features_check), use netdev_features_t as return value. Then we
>>> have to change their prototype.
>> We have to do 12k lines of changes already :D
>> You know, 16 bytes is probably fine to return directly and it will
>> be enough for up to 128 features (+64 more comparing to the
>> mainline). OTOH, using pointers removes that "what if/when", so
>> it's more flexible in that term. So that's why I asked for other
>> folks' opinions -- 2 PoVs doesn't seem enough here.
> >From a quick grep it seems like the and() is mostly used in some form
> of:
>
> features = and(features, mask);
>
> and we already have netdev_features_clear() which modifies its first
> argument. I'd also have and() update its first arg rather than return
> the result as a value.
ok, I will follow the behaviour of bitmap_and().
> It will require changing the prototype of
> ndo_features_check() :( But yeah, I reckon we shouldn't be putting of
> refactoring, best if we make all the changes at once than have to
> revisit this once the flags grow again and return by value starts to
> be a problem.
> .
>
Thanks,
Jian
next prev parent reply other threads:[~2022-08-12 11:43 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 3:05 [RFCv7 PATCH net-next 00/36] net: extend the type of netdev_features_t to bitmap Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 01/36] net: introduce operation helpers for netdev features Jian Shen
2022-08-10 9:43 ` Alexander Lobakin
2022-08-10 11:32 ` shenjian (K)
2022-08-11 10:49 ` Alexander Lobakin
2022-08-12 2:39 ` shenjian (K)
2022-08-10 3:05 ` [RFCv7 PATCH net-next 02/36] net: replace general features macroes with global netdev_features variables Jian Shen
2022-08-10 9:58 ` Alexander Lobakin
2022-08-10 12:01 ` shenjian (K)
2022-08-11 11:05 ` Alexander Lobakin
2022-08-12 10:58 ` shenjian (K)
2022-08-10 20:21 ` kernel test robot
2022-08-10 3:05 ` [RFCv7 PATCH net-next 03/36] net: replace multiple feature bits with DECLARE_NETDEV_FEATURE_SET Jian Shen
2022-08-10 10:37 ` Alexander Lobakin
2022-08-10 12:15 ` shenjian (K)
2022-08-10 3:05 ` [RFCv7 PATCH net-next 04/36] net: sfc: replace const features initialization " Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 05/36] net: atlantic: replace const features initialization with NETDEV_FEATURE_SET Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 06/36] iwlwifi: " Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 07/36] net: ethernet: mtk_eth_soc: " Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 08/36] ravb: " Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 09/36] test_bpf: " Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 10/36] treewide: replace NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK by netdev_csum_gso_features_mask Jian Shen
2022-08-10 3:05 ` [RFCv7 PATCH net-next 11/36] treewide: replace NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM by netdev_ip_csum_features Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 12/36] treewide: replace NETIF_F_TSO | NETIF_F_TSO6 by netdev_general_tso_features Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 13/36] treewide: replace VLAN tag feature array by const vlan features Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 14/36] net: simplify the netdev features expressions for xxx_gso_segment Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 15/36] treewide: simplify the netdev features expression Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 16/36] treewide: use replace features '0' by netdev_empty_features Jian Shen
2022-08-10 10:48 ` Alexander Lobakin
2022-08-10 12:25 ` shenjian (K)
2022-08-11 12:35 ` Alexander Lobakin
2022-08-10 3:06 ` [RFCv7 PATCH net-next 17/36] treewide: adjust features initialization Jian Shen
2022-08-10 10:58 ` Alexander Lobakin
2022-08-10 14:06 ` shenjian (K)
2022-08-10 3:06 ` [RFCv7 PATCH net-next 18/36] net: mlx4: adjust the net device feature relative macroes Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 19/36] net: mlx5e: adjust " Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 20/36] net: mlxsw: adjust input parameter for function mlxsw_sp_handle_feature Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 21/36] net: iavf: adjust net device features relative macroes Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 22/36] net: core: adjust netdev_sync_xxx_features Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 23/36] net: adjust the build check for net_gso_ok() Jian Shen
2022-08-10 11:09 ` Alexander Lobakin
2022-08-10 14:41 ` shenjian (K)
2022-08-10 3:06 ` [RFCv7 PATCH net-next 24/36] treewide: use netdev_feature_add helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 25/36] treewide: use netdev_features_or/set helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 26/36] treewide: use netdev_feature_change helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 27/36] treewide: use netdev_feature_del helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 28/36] treewide: use netdev_features_andnot and netdev_features_clear helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 29/36] treewide: use netdev_features_xor helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 30/36] treewide: use netdev_feature_test helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 31/36] treewide: use netdev_features_intersects helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 32/36] net: use netdev_features_and and netdev_features_mask helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 33/36] treewide: use netdev_features_subset helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 34/36] treewide: use netdev_features_equal helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 35/36] treewide: use netdev_features_empty helpers Jian Shen
2022-08-10 3:06 ` [RFCv7 PATCH net-next 36/36] net: redefine the prototype of netdev_features_t Jian Shen
2022-08-10 11:35 ` Alexander Lobakin
[not found] ` <3df89822-7dec-c01e-0df9-15b8e6f7d4e5@huawei.com>
2022-08-11 13:07 ` Alexander Lobakin
2022-08-11 15:13 ` Jakub Kicinski
2022-08-12 11:43 ` shenjian (K) [this message]
2022-08-12 11:30 ` shenjian (K)
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