From nobody Mon Feb 9 05:29:52 2026 Received: from esa4.hc555-34.eu.iphmx.com (esa4.hc555-34.eu.iphmx.com [207.54.77.171]) (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 31E853090D2 for ; Sun, 11 Jan 2026 15:26:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=207.54.77.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768145207; cv=none; b=dvfCs46pDxUKGvHHrElaEywWZJjDbeY7HvLf73bhtlEaY0g61/dn0Br7i1xsJC/lhDPBh1ZG8EvWT+BTeNP4DzBGaJyXfa00DsFah9FGuJgK9/ssQ+/f0WxJRN+pcMiW8G+ZIWjyrSQaMLMiVW9YK89+O8DOVClErESRsdXquuc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768145207; c=relaxed/simple; bh=UlIt9s9yR8yKhklSg4J+BuQNVNApOmRJVqMCK94UDEI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=VUA5nShoX3Nf4tUz7QGqM88tMhBt1rLEbUY39enjYVBQOhcEmTQ21EoRpOYulAcyUI/WvdEpLyXDyjvkhy4Y85laCxbKsB/6b+TKsC3Qgoe3PziJTiqmoi41oh1UwiVqSSIazk0vZ5ECtDUUD31paEu9ca6TOLsR6MtVo7/8Alw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mobileye.com; spf=pass smtp.mailfrom=mobileye.com; dkim=fail (0-bit key) header.d=mobileye.com header.i=@mobileye.com header.b=Vqi5oHah reason="key not found in DNS"; arc=none smtp.client-ip=207.54.77.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mobileye.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mobileye.com Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=mobileye.com header.i=@mobileye.com header.b="Vqi5oHah" DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=mobileye.com; i=@mobileye.com; q=dns/txt; s=MoEyIP; t=1768145202; x=1799681202; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=UlIt9s9yR8yKhklSg4J+BuQNVNApOmRJVqMCK94UDEI=; b=Vqi5oHahDUbPWmVZI+DetHwGdYpbKQUkNoEZ3BUChUhwEyuFOVdKoRWP DDQt3M6BkXHuJpHT3mJ55/IZuV2egy2oTPWiWAbNi69W9SMbxj6uHaDNm MxtBF/XtAEgZxTbKXam4Vv00zrdkzMoOL4myWWY7rcfg2HWw5ZD4F5NUo TriSGwZzXO5LtnsGhfExGmKOI1BSYzyuZa3AvFZ3y2oFwtORI+/3oZF0t U7iil3Y2wjRohOmcXVr5A48JDDJPZRwscW9kbRt7aKsQfn+XvPXSlwZSR VMiZO/1jYPDjXyXtZsuo1TxUHpfGHrR5DZ6ed5wwNFqZ62E3MaassIDmJ Q==; X-CSE-ConnectionGUID: 6vrrXYznSxKGpCrr2jaJ9Q== X-CSE-MsgGUID: y98LsEd2SL6MqSwCJqsC9g== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from unknown (HELO ces02_data.me-corp.lan) ([146.255.191.134]) by esa4.hc555-34.eu.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jan 2026 17:26:35 +0200 X-CSE-ConnectionGUID: vwqIJSXJSUGiSA4bh2/gwg== X-CSE-MsgGUID: 9HF6WbLXSE+cE/1sFrLwNQ== Received: from unknown (HELO epgd071.me-corp.lan) ([10.154.54.6]) by ces02_data.me-corp.lan with SMTP; 11 Jan 2026 17:28:22 +0200 Received: by epgd071.me-corp.lan (sSMTP sendmail emulation); Sun, 11 Jan 2026 17:26:34 +0200 From: Vladimir Kondratiev To: Marek Szyprowski , Robin Murphy Cc: Vladimir Kondratiev , iommu@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] dma-pool: don't allocate DMA32 pool if no 32-bit memory Date: Sun, 11 Jan 2026 17:26:32 +0200 Message-ID: <20260111152632.2133580-1-vladimir.kondratiev@mobileye.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If system have no 32-bit memory, GFP_DMA32 pool allocation will obviously fail, so skip it. Signed-off-by: Vladimir Kondratiev --- kernel/dma/pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c index ee45dee33d49..f38170f6635b 100644 --- a/kernel/dma/pool.c +++ b/kernel/dma/pool.c @@ -209,7 +209,7 @@ static int __init dma_atomic_pool_init(void) if (!atomic_pool_dma) ret =3D -ENOMEM; } - if (IS_ENABLED(CONFIG_ZONE_DMA32)) { + if (IS_ENABLED(CONFIG_ZONE_DMA32) && phys_ram_base < BIT_ULL(32)) { atomic_pool_dma32 =3D __dma_atomic_pool_init(atomic_pool_size, GFP_KERNEL | GFP_DMA32); if (!atomic_pool_dma32) base-commit: 7d0a66e4bb9081d75c82ec4957c50034cb0ea449 --=20 2.43.0