Subject: Re: [RFC PATCH net-next] net: Convert LIMIT_NETDEBUG to net_dbg_ratelimited

From: Joe Perches <[email-masked]>
Date: Mon, 10 Nov 2014 07:26:55 -0800

On Mon, 2014-11-10 at 15:27 +0100, Nicolas Dichtel wrote:
> Le 09/11/2014 20:17, Joe Perches a écrit :
> > Use the more common dynamic_debug capable net_dbg_ratelimited
> > and remove the LIMIT_NETDEBUG macro.
> >
> > This may have some negative impact on messages that were
> > emitted at KERN_INFO that are not not enabled at all unless
> > DEBUG is defined or dynamic_debug is enabled.  Even so,
> > these messages are now _not_ emitted by default.
> >
> > This eliminates the use of the net_msg_warn sysctl
> > "/proc/sys/net/core/warnings".
[]
> > diff --git a/include/net/sock.h b/include/net/sock.h
[]
> > @@ -2276,13 +2276,7 @@ bool sk_ns_capable(const struct sock *sk,
> >   bool sk_capable(const struct sock *sk, int cap);
> >   bool sk_net_capable(const struct sock *sk, int cap);
> >
> > -/*
> > - *	Enable debug/info messages
> > - */
> > -extern int net_msg_warn;
> > -#define LIMIT_NETDEBUG(fmt, args...) \
> > -	do { if (net_msg_warn && net_ratelimit()) printk(fmt,##args); } while(0)
> > -
> > +extern int net_msg_warn;	/* Unused, but still a sysctl */
> Why not removing this variable from this header and from net/core/utils.c?
> Just declaring a static variable in net/core/sysctl_net_core.c should be enough.
> Am I missing something?

No.  It's reasonable to remove its EXPORT_SYMBOL use too.

First let's see if there are any objections to the removal.