linux-kernel - Re: [PATCH iwl-next 01/12] libeth: add cacheline / struct alignment helpers

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Message-ID: <20240529183409.29a914c2@kernel.org>
Date: Wed, 29 May 2024 18:34:09 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Alexander Lobakin <aleksander.lobakin@...el.com>
Cc: intel-wired-lan@...ts.osuosl.org, Tony Nguyen
 <anthony.l.nguyen@...el.com>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Mina
 Almasry <almasrymina@...gle.com>,
 nex.sw.ncis.osdt.itp.upstreaming@...el.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH iwl-next 01/12] libeth: add cacheline / struct alignment
 helpers

On Tue, 28 May 2024 15:48:35 +0200 Alexander Lobakin wrote:
> diff --git a/scripts/kernel-doc b/scripts/kernel-doc
> index 95a59ac78f82..d0cf9a2d82de 100755
> --- a/scripts/kernel-doc
> +++ b/scripts/kernel-doc
> @@ -1155,6 +1155,7 @@ sub dump_struct($$) {
>          $members =~ s/\bstruct_group_attr\s*\(([^,]*,){2}/STRUCT_GROUP(/gos;
>          $members =~ s/\bstruct_group_tagged\s*\(([^,]*),([^,]*),/struct $1 $2; STRUCT_GROUP(/gos;
>          $members =~ s/\b__struct_group\s*\(([^,]*,){3}/STRUCT_GROUP(/gos;
> +        $members =~ s/\blibeth_cacheline_group\s*\(([^,]*,)/struct { } $1; STRUCT_GROUP(/gos;
>          $members =~ s/\bSTRUCT_GROUP(\(((?:(?>[^)(]+)|(?1))*)\))[^;]*;/$2/gos;
>  
>          my $args = qr{([^,)]+)};

Having per-driver grouping defines is a no-go.
Do you need the defines in the first place?
Are you sure the assert you're adding are not going to explode
on some weird arch? Honestly, patch 5 feels like a little too
much for a driver..