Re: [PATCH] x86/mmuext: Unify okay/rc error handling in do_mmuext_op()

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 21/12/2015 17:50, Boris Ostrovsky wrote:
> On 12/21/2015 12:16 PM, Andrew Cooper wrote:
>> c/s 506db90 "x86/HVM: merge HVM and PVH hypercall tables" introduced
>> a path
>> whereby 'okay' was used uninitialised, with broke compilation on
>> CentOS 7.
>>
>> Splitting the error handling like this is fragile and unnecessary. 
>> Drop the
>> okay variable entirely and just use rc directly, substituting rc =
>> -EINVAL/0
>> for okay = 0/1.
>>
>> In addition, two error messages are updated to print rc, and some stray
>> whitespace is dropped.
>>
>> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
>> ---
>> CC: Jan Beulich <JBeulich@suse.com>
>> CC: Boris Ostrovsky <boris.ostrovsky@oracle.com>
>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
>
> with a couple of style nits:
>
>> @@ -3258,14 +3254,14 @@ long do_mmuext_op(
>>                 break;
>>           }
>> -
>> +
>>           case MMUEXT_TLB_FLUSH_LOCAL:
>>               if ( likely(d == pg_owner) )
>>                   flush_tlb_local();
>>               else
>>                   rc = -EPERM;
>>               break;
>> -
>> +
>>           case MMUEXT_INVLPG_LOCAL:
>>               if ( unlikely(d != pg_owner) )
>>                   rc = -EPERM;
>
> These look like stray changes.

They are specifically the stray bits of whitespace referred to in the
commit message.

~Andrew