Re: [PATCH v2] powerpc/traps: Enhance readability for trap types

Segher Boessenkool [off-list ref] writes:

On Wed, Mar 31, 2021 at 08:58:17PM +1100, Michael Ellerman wrote:

quoted

So perhaps:

  EXC_SYSTEM_RESET
  EXC_MACHINE_CHECK
  EXC_DATA_STORAGE
  EXC_DATA_SEGMENT
  EXC_INST_STORAGE
  EXC_INST_SEGMENT
  EXC_EXTERNAL_INTERRUPT
  EXC_ALIGNMENT
  EXC_PROGRAM_CHECK
  EXC_FP_UNAVAILABLE
  EXC_DECREMENTER
  EXC_HV_DECREMENTER
  EXC_SYSTEM_CALL
  EXC_HV_DATA_STORAGE
  EXC_PERF_MONITOR

These are interrupt (vectors), not exceptions.  It doesn't matter all
that much, but confusing things more isn't useful either!  There can be
multiple exceptions that all can trigger the same interrupt.

Yeah I know, but I think that ship has already sailed as far as the
naming we have in the kernel.

We have over 250 uses of "exc", and several files called "exception"
something.

Using "interrupt" can also be confusing because Linux uses that to mean
"external interrupt".

But I dunno, maybe INT or VEC is clearer? .. or TRAP :)

cheers