From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f178.google.com (mail-pg1-f178.google.com [209.85.215.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ADCE134F474 for ; Wed, 27 May 2026 22:25:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779920723; cv=none; b=PbQElco4qX2nbe6V7Nu+gjbAqOJXNs6gprRsOW6/WAc9rYReLmhaJ/7Ca+BiQpZIW2wUwTjsSbxhby+Cf3rUrIfKhL3+FCVA6xn2T++5+LfobPmLKdLv0f9pSo4YXun5gpFz6tGFAOVniwnuiekI7aHSXd9Vy9tw17zOf+VdolQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779920723; c=relaxed/simple; bh=8Oui1g/t3CEcwouE9CYohY0ZFQnGESUjzQFNTcFUoII=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=MO3lo/+gdyMBBDt9/LFqS6dT3Trpe/XctA0Znl00XQSzrKdGbucyNhaoGa/r8el22KC9gZHOvNOhD7bNHfBu4okU71xMX6sW0F1z6EfcH3NOwdCW+ixQdClZPVqobmitDHef6fk5UKM5QvMZ5Ig2/Xx8xLs+aFeu9iUFAkxYMBk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CgB4luU9; arc=none smtp.client-ip=209.85.215.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CgB4luU9" Received: by mail-pg1-f178.google.com with SMTP id 41be03b00d2f7-c802803ac17so5071214a12.1 for ; Wed, 27 May 2026 15:25:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779920722; x=1780525522; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=LkkSrN05A0yihgCNeGvH3o3kC9AabElowNNwozsOF+w=; b=CgB4luU9piCAjy67jteaC1GDYKG7JKuViSTPLSpG/s88tc8EuPX4ZUzdTytQAPDtdK 6i+Rc58tgG/aa8zQQU0P2i+1phQxIbRIlIlQvChpa7THrVt3+Y7xzWHisLo+zOpABA94 xYWO4PbFqK/tcX/35FZK5qdqNBPYO+2bL69nCGvG4G2Pg9INL+srlz7AFQS3qnaFmnrK YND6FzXz8boBqitE7fkuBQ4ZdYMHTwZcs2ElqUfaGiTBnzrQGuyP9oVmyIsKkz8m6rnI ekEFp4UX4LnIxiF3wAdbln7Temh7DnjWpVuKvweDy/p0XaFgoPg9WrS8NdYL6KENWWeE 7s5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779920722; x=1780525522; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=LkkSrN05A0yihgCNeGvH3o3kC9AabElowNNwozsOF+w=; b=P2BkSpRH2bzbVPSxyNdM2IEAGBDk/d2mSZFBim5oCDFmPh/4aI8jx2XQS0ashe8oHb oZ0JQMNzCL3PoDymh99ZD6RpGkBojYvuXPAWELQrlKtXenRWyJcEPmtxSWuCK5hlWN1e RC8S494Wm06vwzXZ80G9f1PkzYenoPtFaUfJFeN5zzF7Li9SRuv2/YOqlnZEMw6SoK7Z nSr7BNM/8yiKEyF/tjMBSTKvUBiUoprkqLoy9AokzOo/NqC0YOf0s0AIrY6o5GUwRziE 6WcXuj6SzXkQZa5Mbo8DCE2tth5IzkvDvKRZswfTbDCxpQUXCxqKEizeSXrIEmvbJ6d3 /aLg== X-Gm-Message-State: AOJu0Yw41k0+FLqimBVEzHkOe8gjyE37Tg55Ctyb5fSr+wAaz09/OtRf 5ra9OuIlukZpLn4AZHRtJQXwN1nt/ktPBlTLeZ1X932wdmw1GHNXjQWuzMq0bw== X-Gm-Gg: Acq92OEdVUqmea/j5XNuAZIctjhwd4unpRa+W5006X0JIpMH0WNzy4I56K2R7j4fRe1 sWC1DuYBUA4ObVC5FwLngVtvFsZ4Vd5X9MYc3vJsHjDO3f8snWVucfi+MmKEaYd6BfcX5OhgO6/ EBevzvTvBdoW1RNgawNs6wIZQDe671pk4BxJv7iFK/m+aFSFD8JfKFL3zuJDrOrUZ4KqSz2sUJp UdeGD7El3zua18yFAfGaKxsIfogwl+DBQqJki8FdZdslKjN2o2cf1A6v6GamO1Uj1it3Q4lTHZ3 3xW9ybzFdiXghMTzimh2c+uD95PEr6oVimJlgfO/7fe+56gMDvu9ziNrZvLuCmLon3ZyVsQKoOU qc9UdjizgAOmJizFg0dENNsJGjzdgmvjMwnM3xMX7z9QkbnUBNnRHm6TFpYEkn9v9AWJY6OsmZw fwft2rkoQ4eU6osAlo0TTT8Fi9BQgWSUmRy4RejWDjr5gIh5IIfuxtvN8IW2c5+FNIQunCVyrKw RLf8m1zgUqj49OyW8gKUgkLpIukkJvRMhFaUPYum1whHw== X-Received: by 2002:a05:6a00:8c10:b0:81f:9b4c:81c0 with SMTP id d2e1a72fcca58-8415f58d727mr23120877b3a.41.1779920722005; Wed, 27 May 2026 15:25:22 -0700 (PDT) Received: from ryzen ([2601:644:8000:5b5d:7285:c2ff:fe45:8a32]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-841d71f37bcsm3096240b3a.50.2026.05.27.15.25.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 May 2026 15:25:21 -0700 (PDT) From: Rosen Penev To: linux-mips@vger.kernel.org Cc: Thomas Bogendoerfer , linux-kernel@vger.kernel.org (open list) Subject: [PATCH] MIPS: ath79: reduce ARCH_DMA_MINALIGN Date: Wed, 27 May 2026 15:25:04 -0700 Message-ID: <20260527222504.17381-1-rosenp@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, ath79 SoCs use the default ARCH_DMA_MINALIGN value of 128 bytes defined in mach-generic. This is excessive for these platforms and leads to significant memory waste in kmalloc. Override ARCH_DMA_MINALIGN to use L1_CACHE_BYTES, which is 32 bytes for ath79 SoCs. Signed-off-by: Rosen Penev --- arch/mips/include/asm/mach-ath79/kmalloc.h | 7 +++++++ 1 file changed, 7 insertions(+) create mode 100644 arch/mips/include/asm/mach-ath79/kmalloc.h diff --git a/arch/mips/include/asm/mach-ath79/kmalloc.h b/arch/mips/include/asm/mach-ath79/kmalloc.h new file mode 100644 index 000000000000..954f5d6e0dd0 --- /dev/null +++ b/arch/mips/include/asm/mach-ath79/kmalloc.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_MACH_ATH79_KMALLOC_H +#define __ASM_MACH_ATH79_KMALLOC_H + +#define ARCH_DMA_MINALIGN L1_CACHE_BYTES + +#endif /* __ASM_MACH_ATH79_KMALLOC_H */ -- 2.54.0