linux-kernel - Re: [PATCH] net: netfilter: nfnetlink: Fixed warning for nfnl_get

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Date:	Mon, 4 Mar 2013 22:05:51 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Alexandru Gheorghiu <gheorghiuandru@...il.com>
Cc:	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: netfilter: nfnetlink: Fixed warning for
 nfnl_get_lock

On Mon, Mar 04, 2013 at 09:43:11PM +0200, Alexandru Gheorghiu wrote:
> Removed unused function nfnl_get_lock which fixed the following warning:
> net/netfilter/nfnetlink.c:65:22: warning: ‘nfnl_get_lock’ defined but not used [-Wunused-function]
> 
> Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@...il.com>
> ---
>  net/netfilter/nfnetlink.c |    5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
> index d578ec2..44aa0a7 100644
> --- a/net/netfilter/nfnetlink.c
> +++ b/net/netfilter/nfnetlink.c
> @@ -62,11 +62,6 @@ void nfnl_unlock(__u8 subsys_id)
>  }
>  EXPORT_SYMBOL_GPL(nfnl_unlock);
> 
> -static struct mutex *nfnl_get_lock(__u8 subsys_id)
> -{
> -	return &table[subsys_id].mutex;
> -}
> -

I see the same warning here, gcc (Debian 4.7.2-5) 4.7.2.

Actually this function *is* used a bit further in the same file in
nfnetlink_rcv_msg().

But gcc complains for some reason of which I don't even have the
slightest idea. However, if you declare the above function "static
inline..." the warning is gone.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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