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Date: Fri, 30 Sep 2022 17:41:22 +0200 From: Petr Machata <petrm@...dia.com> To: Petr Machata <petrm@...dia.com> CC: Daniel Machon <daniel.machon@...rochip.com>, <netdev@...r.kernel.org>, <davem@...emloft.net>, <maxime.chevallier@...tlin.com>, <thomas.petazzoni@...tlin.com>, <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>, <lars.povlsen@...rochip.com>, <Steen.Hegelund@...rochip.com>, <UNGLinuxDriver@...rochip.com>, <joe@...ches.com>, <linux@...linux.org.uk>, <horatiu.vultur@...rochip.com>, <Julia.Lawall@...ia.fr>, <vladimir.oltean@....com>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH net-next v2 1/6] net: dcb: add new pcp selector to app object Petr Machata <petrm@...dia.com> writes: > We can pack the new stuff into a smaller payload. The inner attribute > would not be DCB_ATTR_DCB_APP, but say DCB_ATTR_DCB_PCP, which would > imply the selector. The payload can be struct { u8 prio; u16 proto; }. > This would have been bounced by the old UAPI, so we know no userspace > makes use of that. Except this will end up having size of 4 anyway due to alignment. We'll have to make it a struct { ... } __attribute__((__packed__));
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