[PATCH] Treat ISI faults as read faults on classic 32-bit PowerPC

[Segher Boessenkool]

>> Hmmm.  The dangling else clauses are pretty gross, and in fact we  
>> have
>> the same problem on POWER3 and RS64 processors (to be fair, we had
>> the problem before and didn't notice, but we should still fix it).
>>
>> How about this instead?  Could people test it please?  (Note that
>> CPU_FTR_NOEXECUTE is 0 in 32-bit kernels.)
>>
>> Paul.
>>
>> diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
>> index 0ece513..99c3093 100644
>> --- a/arch/powerpc/mm/fault.c
>> +++ b/arch/powerpc/mm/fault.c
>
> Acked-by: Jon Loeliger <jdl at freescale.com>
>
> Tested on 8641HPCN.

Which glibc versions?  glibc-2.4 and newer are fine without the
patch already, glibc-2.3 seems to get away by accident; but 2.2
(and before) are the problematic ones.

No other userland program has been identified as needing this
fix, btw -- thankfully, or the testing matrix would be _huge_.


Segher