From: David Miller <davem@davemloft.net>
To: schwidefsky@de.ibm.com
Cc: jwi@linux.vnet.ibm.com, netdev@vger.kernel.org,
linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com,
raspl@linux.vnet.ibm.com, ubraun@linux.vnet.ibm.com
Subject: Re: [PATCH net-next 3/4] s390/diag: add diag26c support
Date: Mon, 19 Jun 2017 13:37:43 -0400 (EDT) [thread overview]
Message-ID: <20170619.133743.1638444891079509192.davem@davemloft.net> (raw)
In-Reply-To: <20170619173425.4d537667@mschwideX1>
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Mon, 19 Jun 2017 17:34:25 +0200
> We (as in the s390 guys) tend to add __packed to hardware and hypervisor
> structures even if the attribute is not strictly necessary. Most of the
> diagnose related structures look that way. Dunno if it is worth to change
> them.
It causes gcc to generate bad code on certain platforms (yes, probably not
yours) and is in general something to avoid.
Please do not use __packed unless absolutely necessary.
> The diag26c struct needs to be aligned on a doubleword boundary, the
> __aligned(8) is necessary.
That's fine.
> The __packed attribute is again superfluous but follows along the
> lines of the other diag structures.
Please remove it.
next prev parent reply other threads:[~2017-06-19 17:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-19 11:22 [PATCH net-next 0/4] s390/net updates, part 2 Julian Wiedmann
2017-06-19 11:22 ` [PATCH net-next 1/4] s390/qeth: add ipa return codes for bridgeport Julian Wiedmann
2017-06-19 11:22 ` [PATCH net-next 2/4] s390/qeth: fix packing buffer statistics Julian Wiedmann
2017-06-19 11:22 ` [PATCH net-next 3/4] s390/diag: add diag26c support Julian Wiedmann
2017-06-19 14:47 ` David Miller
2017-06-19 15:34 ` Martin Schwidefsky
2017-06-19 17:37 ` David Miller [this message]
2017-06-21 15:30 ` Martin Schwidefsky
2017-06-19 11:22 ` [PATCH net-next 4/4] s390/qeth: use diag26c to get MAC address on L2 Julian Wiedmann
2017-06-19 14:48 ` David Miller
-- strict thread matches above, loose matches on Subject: below --
2017-06-20 14:00 [PATCH net-next 0/4] s390/net updates, part 2 (v2) Julian Wiedmann
2017-06-20 14:00 ` [PATCH net-next 3/4] s390/diag: add diag26c support Julian Wiedmann
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