linux-kernel - Re: Behavior of BUG() [Was: Re: [PATCH 2/5] of/fdt: add kernel command line option for dtb

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Message-ID: <1289966843.26343.359.camel@calx>
Date:	Tue, 16 Nov 2010 22:07:23 -0600
From:	Matt Mackall <mpm@...enic.com>
To:	Arnaud Lacombe <lacombar@...il.com>
Cc:	linux-kernel@...r.kernel.org, dirk.brandewie@...il.com,
	linux-arch@...r.kernel.org, linux-kbuild@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: Behavior of BUG() [Was: Re: [PATCH 2/5] of/fdt: add kernel
 command line option for dtb_compat string]

On Tue, 2010-11-16 at 22:45 -0500, Arnaud Lacombe wrote:
> Hi,
> 
> [CC: list reduced as starting a new thread, most on the context
> removed as this concern a different issue.]
> 
> On Tue, Nov 16, 2010 at 7:16 PM, Grant Likely <grant.likely@...retlab.ca> wrote:
> > On Tue, Nov 16, 2010 at 3:41 PM,  <dirk.brandewie@...il.com> wrote:
> >> From: Dirk Brandewie <dirk.brandewie@...il.com>
> >> [...]
> > The kernel needs to complain *loudly* if this occurs because it
> > represents a bug.  I'm tempted to say use BUG, but that would halt the
> > kernel and prevent any possibility of kernel log output.
> > [...]
> does it ? if CONFIG_BUG is not enabled and the arch has no define for
> it, the default does _nothing_:

That's because CONFIG_BUG=N is intended for machines where logging is
irrelevant/impossible. You are encouraged to ignore all options under
CONFIG_EMBEDDED when trying to have a sensible discussion.

-- 
Mathematics is the supreme nostalgia of our time.


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