linux-kernel - RE: [PATCH v2] x86/hyper-v: Mark TLFS structures packed

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Message-ID: <874lbuyb9j.fsf@vitty.brq.redhat.com>
Date:   Mon, 03 Dec 2018 14:45:28 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     Michael Kelley <mikelley@...rosoft.com>,
        "kvm\@vger.kernel.org" <kvm@...r.kernel.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        Roman Kagan <rkagan@...tuozzo.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "x86\@kernel.org" <x86@...nel.org>,
        Nadav Amit <nadav.amit@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: RE: [PATCH v2] x86/hyper-v: Mark TLFS structures packed

Michael Kelley <mikelley@...rosoft.com> writes:

> From: Vitaly Kuznetsov <vkuznets@...hat.com>  Sent: Friday, November 30, 2018 4:54 AM
>> 
>> @@ -466,7 +466,7 @@ union hv_message_flags {
>>  	struct {
>>  		__u8 msg_pending:1;
>>  		__u8 reserved:7;
>> -	};
>> +	} __packed;
>>  };
>> 
>>  /* Define port identifier type. */
>
> I think __packed is also needed in the definition
> of struct u defined within union hv_port_id.  That
> struct has bit fields, so shouldn't it be done just like
> union hv_message_flags above?
>

True, missed it, thanks! Will send v3 out shortly.

-- 
Vitaly