netdev - Re: [PATCH] net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC

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Message-Id: <20160501.214934.2250379996423526821.davem@davemloft.net>
Date:	Sun, 01 May 2016 21:49:34 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	tbingham@...mai.com
Cc:	netdev@...r.kernel.org, Jason@...c4.com
Subject: Re: [PATCH] net: Implement net_dbg_ratelimited() for
 CONFIG_DYNAMIC_DEBUG case

From: Tim Bingham <tbingham@...mai.com>
Date: Fri, 29 Apr 2016 13:30:23 -0400

> Prior to commit d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op
> when !DEBUG") the implementation of net_dbg_ratelimited() was buggy
> for both the DEBUG and CONFIG_DYNAMIC_DEBUG cases.
> 
> The bug was that net_ratelimit() was being called and, despite
> returning true, nothing was being printed to the console. This
> resulted in messages like the following -
> 
> "net_ratelimit: %d callbacks suppressed"
> 
> with no other output nearby.
> 
> After commit d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op when
> !DEBUG") the bug is fixed for the DEBUG case. However, there's no
> output at all for CONFIG_DYNAMIC_DEBUG case.
> 
> This patch restores debug output (if enabled) for the
> CONFIG_DYNAMIC_DEBUG case.
> 
> Add a definition of net_dbg_ratelimited() for the CONFIG_DYNAMIC_DEBUG
> case. The implementation takes care to check that dynamic debugging is
> enabled before calling net_ratelimit().
> 
> Fixes: d92cff89a0c8 ("net_dbg_ratelimited: turn into no-op when !DEBUG")
> Signed-off-by: Tim Bingham <tbingham@...mai.com>

Looks good, applied and queued up for -stable, thanks.