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Mon, 09 Mar 2026 04:08:23 -0700 (PDT) X-Received: by 2002:a05:6a00:249b:b0:824:4a22:ec16 with SMTP id d2e1a72fcca58-829a2f142fbmr7232839b3a.34.1773054502566; Mon, 09 Mar 2026 04:08:22 -0700 (PDT) Received: from oss.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-829a48dfc17sm11868886b3a.64.2026.03.09.04.08.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2026 04:08:22 -0700 (PDT) Date: Mon, 9 Mar 2026 16:38:12 +0530 From: Mohd Ayaan Anwar To: "Russell King (Oracle)" Cc: Andrew Lunn , Alexandre Torgue , Andrew Lunn , AngeloGioacchino Del Regno , Chen-Yu Tsai , "David S. Miller" , Eric Dumazet , Frank Li , imx@lists.linux.dev, Jakub Kicinski , Jan Petrous , Jonathan Hunter , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Maxime Chevallier , netdev@vger.kernel.org, Paolo Abeni , Pengutronix Kernel Team , s32@nxp.com, Samuel Holland , Sascha Hauer , Yao Zi Subject: Re: [PATCH net-next v2 1/7] net: stmmac: provide plat_dat->dma_cfg in stmmac_plat_dat_alloc() Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA5MDEwMiBTYWx0ZWRfX5xXnFd+IOzaM WA7hJYq/E0I8i3VsZ/Wx9oeoX+ndr+LCcEAdtJrWyzm2UYdiHZpK52+MeYtuVj2BIsN1LemXx7R hrUNqN2edaqZ56YKrukWSFTjpeKRV78NnPbsiq+EMcVme5gg/Icw+w13QkbrflhcSgZ/XhlHrE8 dXpqF9Q9SmQE/uyPr4p5mHtrxbZkaxB3Vr7D8PoAPiqftN31veoLDjqhEK9CP5zpgaOQj1dzmoI v2i4vOYpZ8jePmlMEWFCssN+FlcDelpXXyiSzQbulAh0awsbfkPxTceTce9cFOO03ytD+OvDhj7 ew5bAhOcOinFfPAm9r9lvnZZuN203bEHSQvAMKpMdCDqjULD6W5FWl1VlM31SdMvg3t/3rj3vH5 AfzCB1pMfz7HZ7yvR7YfhMUza1vkABziHkZIaYgyQoFGhQVLCFKuYKEAldGp1J0GGDma30bc55P zAjuG6QggWT+C4Di7ZQ== X-Proofpoint-ORIG-GUID: MimoFY__ZG1lTQ9B89titsvkBUarSjTc X-Proofpoint-GUID: MimoFY__ZG1lTQ9B89titsvkBUarSjTc X-Authority-Analysis: v=2.4 cv=LOprgZW9 c=1 sm=1 tr=0 ts=69aeaa28 cx=c_pps a=Oh5Dbbf/trHjhBongsHeRQ==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=kj9zAlcOel0A:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=PHq6YzTAAAAA:8 a=EUspDBNiAAAA:8 a=EL_Z8gHO3nUhwFgt7b4A:9 a=CjuIK1q_8ugA:10 a=zZCYzV9kfG8A:10 a=_Vgx9l1VpLgwpw_dHYaR:22 a=ZKzU8r6zoKMcqsNulkmm:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-09_03,2026-03-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 malwarescore=0 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603090102 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260309_040825_589826_245C6894 X-CRM114-Status: GOOD ( 17.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Mar 09, 2026 at 09:39:18AM +0000, Russell King (Oracle) wrote: > plat_dat->dma_cfg is unconditionally required for the operation of the > driver, so it would make sense to allocate it along with the plat_dat. > > On Arm64, sizeof(*plat_dat) has recently shrunk from 880 to 816 bytes > and sizeof(*plat_dat->dma_cfg) has shrunk from 32 to 20 bytes. > > Given that dma_cfg is required, and it is now less than a cache line, > It doesn't make sense to allocate this separateny, so place it at the > end of struct plat_stmmacenet_data, and set plat_dat->dma_cfg to point > at that to avoid mass changes. > > Signed-off-by: Russell King (Oracle) > --- Reviewed-by: Mohd Ayaan Anwar Ayaan