Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH v1 1/2] s390/kvm: split kvm_s390_real_to_abs
To:     Claudio Imbrenda <imbrenda@linux.ibm.com>,
        linux-kernel@vger.kernel.org
Cc:     borntraeger@de.ibm.com, frankja@linux.ibm.com, david@redhat.com,
        cohuck@redhat.com, kvm@vger.kernel.org, linux-s390@vger.kernel.org,
        stable@vger.kernel.org
References: <20210319193354.399587-1-imbrenda@linux.ibm.com>
 <20210319193354.399587-2-imbrenda@linux.ibm.com>
From:   Thomas Huth <thuth@redhat.com>
Message-ID: <fa583ab0-36ac-47a7-7fa3-4ce88c518488@redhat.com>
Date:   Sat, 20 Mar 2021 05:57:31 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.8.0
MIME-Version: 1.0
In-Reply-To: <20210319193354.399587-2-imbrenda@linux.ibm.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 19/03/2021 20.33, Claudio Imbrenda wrote:
> A new function _kvm_s390_real_to_abs will apply prefixing to a real address
> with a given prefix value.
> 
> The old kvm_s390_real_to_abs becomes now a wrapper around the new function.
> 
> This is needed to avoid code duplication in vSIE.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
> ---
>   arch/s390/kvm/gaccess.h | 23 +++++++++++++++++------
>   1 file changed, 17 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
> index daba10f76936..7c72a5e3449f 100644
> --- a/arch/s390/kvm/gaccess.h
> +++ b/arch/s390/kvm/gaccess.h
> @@ -18,17 +18,14 @@
>   
>   /**
>    * kvm_s390_real_to_abs - convert guest real address to guest absolute address
> - * @vcpu - guest virtual cpu
> + * @prefix - guest prefix
>    * @gra - guest real address
>    *
>    * Returns the guest absolute address that corresponds to the passed guest real
> - * address @gra of a virtual guest cpu by applying its prefix.
> + * address @gra of by applying the given prefix.
>    */
> -static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
> -						 unsigned long gra)
> +static inline unsigned long _kvm_s390_real_to_abs(u32 prefix, unsigned long gra)

<bikeshedding>
Just a matter of taste, but maybe this could be named differently? 
kvm_s390_real2abs_prefix() ? kvm_s390_prefix_real_to_abs()?
</bikeshedding>

Anyway:
Reviewed-by: Thomas Huth <thuth@redhat.com>