Warning masked by BUG() when CONFIG_BUG is enabled

[Arnaud Ebalard]

Hi Russell,

Russell King - ARM Linux <linux at arm.linux.org.uk> writes:

> On Sat, Nov 16, 2013 at 11:52:08PM +0100, Arnaud Ebalard wrote:
>> I was kind of curious not to have noticed it during kernel builds for
>> armada 370/xp targets. The reason is the following: on my Armada 370/XP
>> builds, I had CONFIG_BUG=y which makes BUG() call panic() (which never
>> returns).
>
> You're not the first to spot this, and you won't be the last.
>
> Some very experienced kernel hackers have tried to get this fixed and
> failed.  It seems people actually want the CPU to fall through the
> BUG() sites when people disable CONFIG_BUG - which I think is idiotic.
>
> Arnd (and myself) have worked on this problem, and we came up with a
> very nice solution which didn't increase the size of the kernel and
> didn't make things unsafe.  However, it went nowhere.
>
> It's pointless trying to get this fixed - it's just a complete waste of
> time because of politics.  Find something else to attack.  Just ensure
> you always have CONFIG_BUG enabled if you want a system which will
> produce some kind of report when one of these sites gets hit.

Understood. Thanks for the explanation.

Cheers,

a+