[Cake] BUG_ON vs WARN_ON

[Jonathan Morton]

> On 5 Oct, 2016, at 18:24, Kevin Darbyshire-Bryant <kevin at darbyshire-bryant.me.uk> wrote:
> 
> How amenable are you to changing all 4 BUG_ON instances in cake to WARN_ON?
> 
> Linus isn't a complete fan and I'm thinking that producing a stack trace and trying to carry on is more helpful to a remote accessed, no serial interface type device than just killing the kernel dead.
> 
> Quite possibly other bad things(tm) will happen shortly after...or maybe there will be enough time look at dmesg for that stack trace.

The two in cake_heap_swap() can probably go away completely - they were there to make sure the heap algorithms were working correctly.  They never did trigger, as it happens.

The other two are genuine serious bugs (array overflow) if they ever trigger.  It’s safer to leave them as-is.

 - Jonathan Morton