Re: [kvm-unit-tests PATCH v2 1/2] s390x: Remove assert from arch_def.h

[Janis Schoetterl-Glausch <scgl@linux.vnet.ibm.com>]

On 10/5/21 2:51 PM, Janosch Frank wrote:
> On 10/5/21 11:11, Janis Schoetterl-Glausch wrote:
>> Do not use asserts in arch_def.h so it can be included by snippets.
>> The caller in stsi.c does not need to be adjusted, returning -1 causes
>> the test to fail.
>>
>> Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
> 
> A few days ago I had a minute to investigate what needed to be added to be able to link the libcflat. Fortunately it wasn't a lot and I'll try to post it this week so this patch can hopefully be dropped.

One could argue that cc being != 0 is part of the test and so should go through report() and not assert().
Which happens naturally, since the caller will likely compare it to some positive expected value.
> 
>> ---
>>   lib/s390x/asm/arch_def.h | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h
>> index 302ef1f..4167e2b 100644
>> --- a/lib/s390x/asm/arch_def.h
>> +++ b/lib/s390x/asm/arch_def.h
>> @@ -334,7 +334,7 @@ static inline int stsi(void *addr, int fc, int sel1, int sel2)
>>       return cc;
>>   }
>>   -static inline unsigned long stsi_get_fc(void)
>> +static inline int stsi_get_fc(void)
>>   {
>>       register unsigned long r0 asm("0") = 0;
>>       register unsigned long r1 asm("1") = 0;
>> @@ -346,7 +346,8 @@ static inline unsigned long stsi_get_fc(void)
>>                : "+d" (r0), [cc] "=d" (cc)
>>                : "d" (r1)
>>                : "cc", "memory");
>> -    assert(!cc);
>> +    if (cc != 0)
>> +        return -1;
>>       return r0 >> 28;
>>   }
>>  
>