linux-kernel - Re: [net-next PATCH V3 02/12] octeontx2-af: Exact match support

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Date:   Thu, 7 Jul 2022 17:53:07 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Ratheesh Kannoth <rkannoth@...vell.com>
Cc:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sgoutham@...vell.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <pabeni@...hat.com>
Subject: Re: [net-next PATCH V3 02/12] octeontx2-af: Exact match support

On Thu, 7 Jul 2022 13:03:43 +0530 Ratheesh Kannoth wrote:
> CN10KB silicon has support for exact match table. This table
> can be used to match maimum 64 bit value of KPU parsed output.
> Hit/non hit in exact match table can be used as a KEX key to
> NPC mcam.
> 
> This patch makes use of Exact match table to increase number of
> DMAC filters supported. NPC  mcam is no more need for each of these
> DMAC entries as will be populated in Exact match table.
> 
> This patch implements following
> 
> 1. Initialization of exact match table only for CN10KB.
> 2. Add/del/update interface function for exact match table.
> 
> Signed-off-by: Ratheesh Kannoth <rkannoth@...vell.com>

Build with C=1 (i.e. with the sparse checker) we get:

drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_hash.c:558:21: warning: dubious: x & !y

could you figure out which one it is and if it can be muted?