RE: powerpc: Don't silently handle machine checks from userspace

From: Scott Wood [mailto:scottwood@freescale.com]

quoted

Therefore I request to put this check back, and even to put the
removed code at the top of the machine check handler because there is
no point in trying to recover from a user space bus error anyway.

=20
Why is there no point trying to recover?  For example, see MCSR_ICPERR
and MCSR_DCPERR_MC in machine_check_e500mc.  The machine check is just
letting us know that there was an error and the read-only cache got
dumped (i.e. it was a correctable error).

Oh I overlooked those cases; those correctable errors shouldn't be bus erro=
rs for the user space process?

Hmm I guess there is no simple solution then, since the "recover" function =
also prints the kernel messages about the machine check being in kernel mod=
e without having checked whether it really was in kernel mode. In the past =
the user mode check was in between.

Micha