From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Date: Wed, 22 Apr 2015 20:46:52 +0000 Subject: Re: [PATCH v3] Renesas Ethernet AVB driver Message-Id: <553808BC.5020600@cogentembedded.com> List-Id: References: <20150422.113654.1169277303695917496.davem@davemloft.net> <553804CA.1030605@cogentembedded.com> <20150422.164242.2185477513394713122.davem@davemloft.net> In-Reply-To: <20150422.164242.2185477513394713122.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: David Miller Cc: mitsuhiro.kimura.kc@renesas.com, f.fainelli@gmail.com, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, devicetree@vger.kernel.org, galak@codeaurora.org, netdev@vger.kernel.org, richardcochran@gmail.com, linux-sh@vger.kernel.org, masaru.nagai.vx@renesas.com Hello. On 04/22/2015 11:42 PM, David Miller wrote: >> Hmm, I've been digging in the net core, and was unable to see where TX >> skb's get their NET_IP_ALIGN bytes reserved. Have I missed something? >> Probably need to print out skb's fields... > NET_IP_ALIGN is for receive, not transmit. Hm, then 'skb->data' should be aligned to 4 byte boundary on TX, right? If so, there should be no problem with removing the copy. WBR, Segei