From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77E8A27FD6E; Mon, 15 Sep 2025 09:24:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757928251; cv=none; b=swb7pjSlkI+kQ3HOCyuKnMDIpfMSen23O6LwmUtM0m0xS8hRBiQikMbRnS/71cQ2mbj4Q9FTwBpC8j+HqAwugos8qd5OyyFPkIaaVAAGA/Agcf6edLL+2kdsaFeZl0Akkrr30GIU2Em46iuMmEqtIP7xu4ALWdGHlwMbHjytnOg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757928251; c=relaxed/simple; bh=JBZlOusTcmbmYsPbKb8J6BxrqcKJL3ZngDZSFwZQWY8=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=Y4wcvXI/H/uPbV1fuXq+6IMruhFYRWg6vr2gqyQ7ui7DXeWzh3Zgz4QjK+R031G8SiJ8H/eh7OEbe+JbqZD4pzuyK33gT9XROvOualEQ5G1VtXQPctqg3xoUfgGwBj/qUT+2lZJZx9QBhYu54MOzFlOrSA5OVwFXKQRf+ohnJ5E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OJRYu0Cx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OJRYu0Cx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50A8BC4CEF1; Mon, 15 Sep 2025 09:24:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757928251; bh=JBZlOusTcmbmYsPbKb8J6BxrqcKJL3ZngDZSFwZQWY8=; h=From:Subject:Date:To:Cc:From; b=OJRYu0CxmC9Iintt9hOGT1Y8L1JcW0zPHBOTFvWfD5waINWAtHHwP9A8+S5krroJJ L1HX6SYwelOQrlbAoT39wlr/r7VSVo4kTiP7qD7jM9M7kdYPqtTGbYH4JyyQ1bCE3k RjA/tehaPlI02k89+0Av6YKy9OpgXHmlOETwrVN68lffxc7NL9qpDvvPkJQQJR5VAy ABszhjIcVxvCYX+gripwFvlqxv/dgm0dsARLMtmAfVqjqwXJxgT8wJuJQIsR2KNvwb hFin669jOxPgEphsfuKI0A4GvjguSwK5hP2nwuk3JrWj7dC78fEWv4cEdrjATvdjqX 43ndtow985YTw== From: Vincent Mailhol Subject: [PATCH 0/3] can: raw: optimize the sizes of struct uniqframe and struct raw_sock Date: Mon, 15 Sep 2025 18:23:12 +0900 Message-Id: <20250915-can-raw-repack-v1-0-5ea293bc6d33@kernel.org> Precedence: bulk X-Mailing-List: linux-can@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAADbx2gC/yXMQQrCMBCF4auEWTvYBLKwV5EupuOog2Rak1QLp Xc32OX34P0bFMkqBXq3QZaPFp2swZ8c8JPsIai3ZghdiN3FR2QyzPTFLDPxCzl4ojFEZu+hneY sd13/wetwOMt7ad16jDBSEeQpJa29M6lostZzIjUY9v0HTOPvcZEAAAA= X-Change-ID: 20250915-can-raw-repack-c21aab25cc11 To: Oliver Hartkopp , Marc Kleine-Budde Cc: linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, Vincent Mailhol X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=844; i=mailhol@kernel.org; h=from:subject:message-id; bh=JBZlOusTcmbmYsPbKb8J6BxrqcKJL3ZngDZSFwZQWY8=; b=owGbwMvMwCV2McXO4Xp97WbG02pJDBnHb8tN5ugID9rzKyd99cTmVxc6n/4ub2/5uf2hd7yj4 BaTa10lHaUsDGJcDLJiiizLyjm5FToKvcMO/bWEmcPKBDKEgYtTACYyPZjhr5TIheKiffIPRPe9 WrCgurDG1je05njWmj19V+zyt8zL6GBk2P7UnnHjjI59bKcl3E/8j3RKKllm4JwZwy09e3JHRbo DNwA= X-Developer-Key: i=mailhol@kernel.org; a=openpgp; fpr=ED8F700574E67F20E574E8E2AB5FEB886DBB99C2 A few bytes can be shaved out of can raw's struct uniqframe and struct raw_sock. Patch #1 reorders struct uniqframe fields to save 8 bytes. Patch #2 and #3 modify struct raw_sock to use bitfields and to reorder its fields to save 16 bytes in total. Signed-off-by: Vincent Mailhol --- Vincent Mailhol (3): can: raw: reorder struct uniqframe's members to optimise packing can: raw: use bitfields to store flags in struct raw_sock can: raw: reorder struct raw_sock's members to optimise packing net/can/raw.c | 51 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 30 insertions(+), 21 deletions(-) --- base-commit: 5b5ba63a54cc7cb050fa734dbf495ffd63f9cbf7 change-id: 20250915-can-raw-repack-c21aab25cc11 Best regards, -- Vincent Mailhol