Subject: Re: [PATCH 05/13] net: Mark function as static in core/filter.c

From: Josh Triplett <[email-masked]>
Date: Sat, 8 Feb 2014 12:09:52 -0800

On Sun, Feb 09, 2014 at 01:25:05AM +0530, Rashika Kheria wrote:
> Mark function as static in core/filter.c because it is not used outside
> this file.
> 
> This eliminates the following warning in core/filter.c:
> net/core/filter.c:48:7: warning: no previous prototype for ‘bpf_internal_load_pointer_neg_helper’ [-Wmissing-prototypes]
> 
> Signed-off-by: Rashika Kheria <[email-masked]>

This function actually is used outside this file, just not from C code;
a couple of assembly files call it.  (See also the comment above this
definition: "Exported for the bpf jit load helper.")

I'd suggest prototyping this function in include/linux/filter.h , unless
someone on CC has another preference.

>  net/core/filter.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/net/core/filter.c b/net/core/filter.c
> index ad30d62..a022dad 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -44,7 +44,8 @@
>   *
>   * Exported for the bpf jit load helper.
>   */
> -void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb, int k, unsigned int size)
> +static void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb,
> +						  int k, unsigned int size)
>  {
>  	u8 *ptr = NULL;
>  
> -- 
> 1.7.9.5
>