From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) (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 BA5F428FFF6; Thu, 19 Mar 2026 01:29:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773883791; cv=none; b=Hv2l7xuRouCLDTZ+1Jh/RIt6epYY3aNuudBxOrctMevraIIW7sufK0VjZb6GPxu7vaPT6cZuuP+zMA2p4CdNHSfMf0oVZTD4UeEDdcZnRCsBtshkCB3ebUehvGCg0tbESJc2XVpcJZYslf78Iiemosy8H8wcqmKxjwKCn33OEDs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773883791; c=relaxed/simple; bh=+7qbZO+oJj9sQzSsIPmzQyBDvR4X1djf6CJiJixJ0Nc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j0P94ASelhRvDynWCuXPW3LfMI2jXPeZCDtbaT3sihB/MQHNwSHnwVMEgHs6rBTOJxfcEFKe6HOG7LHLcF7ukodO1+K00GsPZbEJcp6ZaSmNnJzld92B1bzB/cS7XniIjQKgJYqBTp/PTMv++lcrKvxI3lUEp3xuHHyxaim0vj8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=groves.net; spf=pass smtp.mailfrom=groves.net; arc=none smtp.client-ip=216.40.44.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=groves.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=groves.net Received: from omf14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 2B8EB1402CF; Thu, 19 Mar 2026 01:29:44 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: john@groves.net) by omf14.hostedemail.com (Postfix) with ESMTPA id 1741B30; Thu, 19 Mar 2026 01:29:32 +0000 (UTC) From: John Groves To: John Groves , Miklos Szeredi , Dan Williams , Bernd Schubert , Alison Schofield Cc: John Groves , Jonathan Corbet , Shuah Khan , Vishal Verma , Dave Jiang , Matthew Wilcox , Jan Kara , Alexander Viro , David Hildenbrand , Christian Brauner , "Darrick J . Wong" , Randy Dunlap , Jeff Layton , Amir Goldstein , Jonathan Cameron , Stefan Hajnoczi , Joanne Koong , Josef Bacik , Bagas Sanjaya , Chen Linxuan , James Morse , Fuad Tabba , Sean Christopherson , Shivank Garg , Ackerley Tng , Gregory Price , Aravind Ramesh , Ajay Joshi , venkataravis@micron.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, John Groves , Ira Weiny Subject: [PATCH V8 4/8] dax: Save the kva from memremap Date: Wed, 18 Mar 2026 20:29:28 -0500 Message-ID: <20260319012928.4475-1-john@groves.net> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260318202737.4344.dax@groves.net> References: <20260318202737.4344.dax@groves.net> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: dkpkffgus8z66bd9f9sd14x6bhyfu1nc X-Rspamd-Server: rspamout01 X-Rspamd-Queue-Id: 1741B30 X-Session-Marker: 6A6F686E4067726F7665732E6E6574 X-Session-ID: U2FsdGVkX18DqTQzoVHQR2j04qujFgikIh0PwIqh0sM= X-HE-Tag: 1773883772-493721 X-HE-Meta: U2FsdGVkX1/TOaPnpzQYJ2rlYO5+cP+e93RxraFn/Z9D2rhOUpEzm0Vg6OOW8Ib4ENiSrSa5Ta+mkewmtIJll8KHV/C5fZ9QDRri0ow0zeRnp0Esy7Ugo1A+N3LlA+zzMF5iptT7kAsxaTPOLtW6sQEMKIgoJQ6snFJFrTYMMLdT+kGFocRHZfKDbTmVtV06enuCd7DYWEdEuKfas5frt/PlZYjLWALsKfltOIp/grxcnXLwdYtnG2pF1X9Bd335bHOyIOzW4cqtLpK7nm8x8ivFCx/ME8HrvemGn+V6vDSIRTXZ1igmzp4gilFf9p4bcbE7OMoItc0BTTSrBA5sLhwGyS52Fyr0 Save the kva from memremap because we need it for iomap rw support. Prior to famfs, there were no iomap users of /dev/dax - so the virtual address from memremap was not needed. Reviewed-by: Ira Weiny Reviewed-by: Dave Jiang Signed-off-by: John Groves --- drivers/dax/dax-private.h | 2 ++ drivers/dax/fsdev.c | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h index c6ae27c982f4..7a3727d76a68 100644 --- a/drivers/dax/dax-private.h +++ b/drivers/dax/dax-private.h @@ -69,6 +69,7 @@ struct dev_dax_range { * data while the device is activated in the driver. * @region: parent region * @dax_dev: core dax functionality + * @virt_addr: kva from memremap; used by fsdev_dax * @align: alignment of this instance * @target_node: effective numa node if dev_dax memory range is onlined * @dyn_id: is this a dynamic or statically created instance @@ -83,6 +84,7 @@ struct dev_dax_range { struct dev_dax { struct dax_region *region; struct dax_device *dax_dev; + void *virt_addr; unsigned int align; int target_node; bool dyn_id; diff --git a/drivers/dax/fsdev.c b/drivers/dax/fsdev.c index e5b4396ce401..d2f6c0341c24 100644 --- a/drivers/dax/fsdev.c +++ b/drivers/dax/fsdev.c @@ -212,6 +212,7 @@ static int fsdev_dax_probe(struct dev_dax *dev_dax) pr_debug("%s: offset detected phys=%llx pgmap_phys=%llx offset=%llx\n", __func__, phys, pgmap_phys, data_offset); } + dev_dax->virt_addr = addr + data_offset; inode = dax_inode(dax_dev); cdev = inode->i_cdev; -- 2.53.0