linux-kernel - Re: [PATCH net-next] net/mlx5i: avoid unused function warning for mlx5i_flow_type

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Message-ID: <4b739b07711c5cb29664a288b8d8a2693d7abf9d.camel@nvidia.com>
Date:   Mon, 25 Oct 2021 19:58:00 +0000
From:   Saeed Mahameed <saeedm@...dia.com>
To:     Tariq Toukan <tariqt@...dia.com>,
        "arnd@...nel.org" <arnd@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "leon@...nel.org" <leon@...nel.org>,
        Moosa Baransi <moosab@...dia.com>
CC:     "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Meir Lichtinger <meirl@...dia.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "moyufeng@...wei.com" <moyufeng@...wei.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] net/mlx5i: avoid unused function warning for
 mlx5i_flow_type_mask

On Fri, 2021-10-22 at 08:47 +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Without CONFIG_MLX5_EN_RXNFC, the function is unused, breaking the
> build with CONFIG_WERROR:
> 
> mlx5/core/ipoib/ethtool.c:36:12: error: unused function
> 'mlx5i_flow_type_mask' [-Werror,-Wunused-function]
> static u32 mlx5i_flow_type_mask(u32 flow_type)
> 
> We could add another #ifdef or mark this function inline, but
> replacing the existing #ifdef with a __maybe_unused seems best
> because that improves build coverage and avoids introducing
> similar problems the next time this code changes.
> 

Hi Arnd, thanks for your patch,
we have a pending patch that simply moves mlx5i_flow_type_mask() into
the #ifdef, where this function is only used

will submit it shortly.

Thanks again for your patch.