[PATCH v3 1/4] kni: add define guards to avoid multi-inclusion

[Ferruh Yigit]

On 2/9/2022 7:24 AM, Weiguo Li wrote:
> Supplement define guards to prevent multiple inclusion.
> 

It is kind of private header and only 'rte_kni.c' includes it,
that is why missing guards doesn't cause trouble but no harm/objection
to have them.

> Signed-off-by: Weiguo Li <liwg06 at foxmail.com>

Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>

> ---
>   lib/kni/rte_kni_fifo.h | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/kni/rte_kni_fifo.h b/lib/kni/rte_kni_fifo.h
> index d2ec82fe87..2ff71554c0 100644
> --- a/lib/kni/rte_kni_fifo.h
> +++ b/lib/kni/rte_kni_fifo.h
> @@ -2,7 +2,8 @@
>    * Copyright(c) 2010-2014 Intel Corporation
>    */
>   
> -
> +#ifndef RTE_KNI_FIFO_H
> +#define RTE_KNI_FIFO_H

It doesn't really differ much but other kni header guards wrapped with '_',
I don't now why.
If there will be a new version can you please apply the same here to have
consistency, like:
#ifndef _RTE_KNI_FIFO_H_

>   
>   /**
>    * @internal when c11 memory model enabled use c11 atomic memory barrier.
> @@ -115,3 +116,5 @@ kni_fifo_free_count(struct rte_kni_fifo *fifo)
>   	uint32_t fifo_read = __KNI_LOAD_ACQUIRE(&fifo->read);
>   	return (fifo_read - fifo_write - 1) & (fifo->len - 1);
>   }
> +
> +#endif /* RTE_KNI_FIFO_H */