linux-kernel - Re: [PATCH net-next] mlx5: work around unused function warning

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Message-ID: <20170427115513.GH14088@mtr-leonro.local>
Date:   Thu, 27 Apr 2017 14:55:13 +0300
From:   Leon Romanovsky <leonro@...lanox.com>
To:     Arnd Bergmann <arnd@...db.de>
CC:     Saeed Mahameed <saeedm@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        Erez Shitrit <erezsh@...lanox.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        <netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] mlx5: work around unused function warning

On Thu, Apr 27, 2017 at 01:04:02PM +0200, Arnd Bergmann wrote:
> The previous patch addressed a sparse warning but replaced it with a
> compiler warning when CONFIG_MODULES is disabled:
>
> drivers/net/ethernet/mellanox/mlx5/core/ipoib.c:485:13: error: 'mlx5_rdma_netdev_free' defined but not used [-Werror=unused-function]
> drivers/net/ethernet/mellanox/mlx5/core/ipoib.c:423:27: error: 'mlx5_rdma_netdev_alloc' defined but not used [-Werror=unused-function]
>
> We should never export 'static' functions, so this makes them global
> again but hides them in another #ifdef like the change before.
>
> Fixes: a7082ef066f0 ("mlx5: hide unused functions")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/ipoib.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
>

Hi Arnd,

Thanks for the patch, but Stephen and Saeed already sent patch similar to it.
http://marc.info/?l=linux-netdev&m=149288674816288&w=2

Thanks

> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
> index 3c84e36af018..eb48f112dff4 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
> @@ -405,7 +405,6 @@ static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
>
>  	return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, dqkey);
>  }
> -#endif
>
>  static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
>  {
> @@ -420,10 +419,10 @@ static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
>  	return 0;
>  }
>
> -static struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
> -						 struct ib_device *ibdev,
> -						 const char *name,
> -						 void (*setup)(struct net_device *))
> +struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
> +					  struct ib_device *ibdev,
> +					  const char *name,
> +					  void (*setup)(struct net_device *))
>  {
>  	const struct mlx5e_profile *profile = &mlx5i_nic_profile;
>  	int nch = profile->max_nch(mdev);
> @@ -482,7 +481,7 @@ static struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
>  }
>  EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
>
> -static void mlx5_rdma_netdev_free(struct net_device *netdev)
> +void mlx5_rdma_netdev_free(struct net_device *netdev)
>  {
>  	struct mlx5e_priv          *priv    = mlx5i_epriv(netdev);
>  	const struct mlx5e_profile *profile = priv->profile;
> @@ -495,4 +494,4 @@ static void mlx5_rdma_netdev_free(struct net_device *netdev)
>  	mlx5e_destroy_mdev_resources(priv->mdev);
>  }
>  EXPORT_SYMBOL(mlx5_rdma_netdev_free);
> -
> +#endif
> --
> 2.9.0
>

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