netdev - RE: [PATCH v2 1/2] net: ethernet: i40e: fix build error

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Date:   Wed, 5 Sep 2018 16:52:35 +0000
From:   "Keller, Jacob E" <jacob.e.keller@...el.com>
To:     Wang Dongsheng <dongsheng.wang@...-semitech.com>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
        "sergei.shtylyov@...entembedded.com" 
        <sergei.shtylyov@...entembedded.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/2] net: ethernet: i40e: fix build error



> -----Original Message-----
> From: Wang Dongsheng [mailto:dongsheng.wang@...-semitech.com]
> Sent: Tuesday, September 04, 2018 7:27 PM
> To: Kirsher, Jeffrey T <jeffrey.t.kirsher@...el.com>;
> sergei.shtylyov@...entembedded.com
> Cc: Keller, Jacob E <jacob.e.keller@...el.com>; davem@...emloft.net; intel-
> wired-lan@...ts.osuosl.org; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; Wang Dongsheng <dongsheng.wang@...-
> semitech.com>
> Subject: [PATCH v2 1/2] net: ethernet: i40e: fix build error
> 
> Remove "inline" from __i40e_add_stat_strings.
> 
> In file included from
> drivers/net/ethernet/intel/i40e/i40e_ethtool.c:9:0:
> drivers/net/ethernet/intel/i40e/i40e_ethtool.c: In function
> ‘__i40e_add_stat_strings’:
> drivers/net/ethernet/intel/i40e/i40e_ethtool_stats.h:193:20: error:
> function ‘__i40e_add_stat_strings’ can never be inlined because it uses
> variable argument lists
>  static inline void __i40e_add_stat_strings(u8 **p, const struct
> 					    i40e_stats stats[],
> 
> Signed-off-by: Wang Dongsheng <dongsheng.wang@...-semitech.com>

Thanks for the fix.

A bit off topic, but these two files in the i40e and i40evf share some code. Is there a good mechanism for sharing these between the two drivers that would allow the modules to be independent? That would be ideal.

Acked-by: Jacob Keller <jacob.e.keller@...el.com>

> ---
> v2:
> 1. Move function.
> 2. Include a new patch at [2/2].
> 
> ---
>  .../net/ethernet/intel/i40e/i40e_ethtool.c    | 24 ++++++++++++++++++
>  .../ethernet/intel/i40e/i40e_ethtool_stats.h  | 25 ++-----------------
>  2 files changed, 26 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> index d7d3974beca2..f4a70d67a80a 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> @@ -1821,6 +1821,30 @@ static void i40e_get_ethtool_stats(struct net_device
> *netdev,
>  		  "ethtool stats count mismatch!");
>  }
> 
> +/**
> + * __i40e_add_stat_strings - copy stat strings into ethtool buffer
> + * @p: ethtool supplied buffer
> + * @stats: stat definitions array
> + * @size: size of the stats array
> + *
> + * Format and copy the strings described by stats into the buffer pointed at
> + * by p.
> + **/
> +void __i40e_add_stat_strings(u8 **p, const struct i40e_stats stats[],
> +			     const unsigned int size, ...)
> +{
> +	unsigned int i;
> +
> +	for (i = 0; i < size; i++) {
> +		va_list args;
> +
> +		va_start(args, size);
> +		vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
> +		*p += ETH_GSTRING_LEN;
> +		va_end(args);
> +	}
> +}
> +
>  /**
>   * i40e_get_stat_strings - copy stat strings into supplied buffer
>   * @netdev: the netdev to collect strings for
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool_stats.h
> b/drivers/net/ethernet/intel/i40e/i40e_ethtool_stats.h
> index bba1cb0b658f..0874c352136a 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool_stats.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool_stats.h
> @@ -181,29 +181,8 @@ i40e_add_queue_stats(u64 **data, struct i40e_ring
> *ring)
>  	*data += size;
>  }
> 
> -/**
> - * __i40e_add_stat_strings - copy stat strings into ethtool buffer
> - * @p: ethtool supplied buffer
> - * @stats: stat definitions array
> - * @size: size of the stats array
> - *
> - * Format and copy the strings described by stats into the buffer pointed at
> - * by p.
> - **/
> -static inline void __i40e_add_stat_strings(u8 **p, const struct i40e_stats stats[],
> -				    const unsigned int size, ...)
> -{
> -	unsigned int i;
> -
> -	for (i = 0; i < size; i++) {
> -		va_list args;
> -
> -		va_start(args, size);
> -		vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
> -		*p += ETH_GSTRING_LEN;
> -		va_end(args);
> -	}
> -}
> +void __i40e_add_stat_strings(u8 **p, const struct i40e_stats stats[],
> +			     const unsigned int size, ...);
> 
>  /**
>   * 40e_add_stat_strings - copy stat strings into ethtool buffer
> --
> 2.18.0