linux-kernel - Re: [PATCH 06/12] KVM: x86: API changes for SMM support

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Date:	Thu, 21 May 2015 16:59:50 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Radim Krčmář <rkrcmar@...hat.com>
CC:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org, bsd@...hat.com
Subject: Re: [PATCH 06/12] KVM: x86: API changes for SMM support



On 21/05/2015 16:49, Radim Krčmář wrote:
> 2015-05-08 13:20+0200, Paolo Bonzini:
>> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
>> @@ -202,7 +202,7 @@ struct kvm_run {
>>  	__u32 exit_reason;
>>  	__u8 ready_for_interrupt_injection;
>>  	__u8 if_flag;
>> -	__u8 padding2[2];
>> +	__u16 flags;
> 
> (It got lost last review and I'd really like to know ...
>  what is the advantage of giving both bytes to flags?)

No advantage.  You just should leave padding2[1] in the middle so that
the offset of &run->padding2[0] doesn't change.  Since it's not obvious
I gave two bytes to flags, but I can do it either way.

Paolo
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