From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH v2] enic: silence log message unless debug
	enabled
Date: Thu, 30 Jul 2015 21:18:06 +0200
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To: Stephen Hemminger <shemming@brocade.com>
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2015-07-30 10:03, Stephen Hemminger:
> --- a/drivers/net/enic/enic_compat.h
> +++ b/drivers/net/enic/enic_compat.h
> @@ -82,7 +82,11 @@
>  #define dev_err(x, args...) dev_printk(ERR, args)
>  #define dev_info(x, args...) dev_printk(INFO,  args)
>  #define dev_warning(x, args...) dev_printk(WARNING, args)
> +#ifdef RTE_LIBRTE_ENIC_DEBUG
>  #define dev_debug(x, args...) dev_printk(DEBUG, args)
> +#else
> +#define dev_debug(x, args...) do { } while(0)
> +#endif

I don't understand why it is needed:
dev_debug won't print anything if the log level is higher than DEBUG.