linux-kernel - Re: ehci dynamic debug problem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 13 Apr 2012 16:57:28 +0200
From:	Johannes Stezenbach <js@...21.net>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Jason Baron <jbaron@...hat.com>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: ehci dynamic debug problem

On Fri, Apr 13, 2012 at 10:35:59AM -0400, Alan Stern wrote:
> On Fri, 13 Apr 2012, Johannes Stezenbach wrote:
> > 
> > Does dynamic debug offer an "is the message two lines below enabled" test?
> > Simply changing the "#ifdef DEBUG" for dbg_port_buf()
> > to "#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)"
> > is probably not acceptable due to the overhead of dbg_port_buf()?
> 
> I don't understand your question.  Doesn't dbg_port_buf need to be 
> defined whenever dynamic debugging is enabled?
> 
> Alternatively, the definition of dbg_port_buf (and related routines) in 
> the !defined(DEBUG) case could be changed; you could add
> 
> 	buf[0] = 0;
> 
> That way you wouldn't get garbage out, although you wouldn't get 
> anything useful either.

The ideal solution I'm looking for gives useful output
when dynamic debugging is enabled for ehci, but does no
useless string formatting when CONFIG_DYNAMIC_DEBUG is y
but the dynamic debug for ehci is disabled.


Thanks,
Johannes
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/