From nobody Mon Feb 9 14:38:41 2026 Received: from mail-oi1-f180.google.com (mail-oi1-f180.google.com [209.85.167.180]) (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 62A073A1CEF for ; Wed, 7 Jan 2026 15:33:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767800034; cv=none; b=AmHrchTFpQUHCYBio6pe5B7u9VkE/mxkoPWtJoSjZsSrx8usyAC0zbhSgkM2xZ85T5+ZicoQyWQa1ntc9eeETUZjFAuBpYxEVQ5udL7R/LMW3mVRbkfYyPfdJ7FtkPMiGNtEJuqgxdoY3z1qeM9ujnQkvjESoCgsnwws+rtI0pY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767800034; c=relaxed/simple; bh=hD5I6TrfIkqR6ZL+5ujqz6J1CgfKrd1fwnq5BYvWvKY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EeMh0xdExlfX1oggA8D01B7qaNkrEx3fAdG3qL1O5SgGsZvRAJs7qoLnBAcSRGisk81kmnSiV9ISzmq9EQixMntYGh13/+O2o8mUdclB2cP/RFpvPAbmFHcyee9gX465OuFEKdwVNzT+ponwkbpJZtoqEy4E9I3jwKXxBIUDzWw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=Groves.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=FqPnRaEq; arc=none smtp.client-ip=209.85.167.180 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=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FqPnRaEq" Received: by mail-oi1-f180.google.com with SMTP id 5614622812f47-455ddb90934so747634b6e.0 for ; Wed, 07 Jan 2026 07:33:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1767800031; x=1768404831; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=sf1UcbhIiBjc/Uk94gbmf97qs8tTGqNT0DMGx4pvtTw=; b=FqPnRaEqzQkwy+NHMj5UExKUCB2RT6msJEJ7Rk5BXRxQkjQA0cwU2mNuZLBiZVFb/8 xk4EhgaRDDC6ig/3lBl3i3gR1lT0kinz9NxCx0pccFHf9OTXlDtQ4cEgRnaMGtg+GO5x IGjSwKY3awbgnxXV1yif2KjallwZq8ihFgjLfVPjMlB7XR7opveNzFuSg7fD2RXN7K84 L/CipeWyL39PwULdnoV+IlTwn/pCEGcoPjYdutALiI4r4oUuD6Mk02iDu3UVBYlM078+ 2gkjD/AUTEGMh5051dEng1qgEaSGm8jOjnU58EjaNueIs+PvBOHA0uZ0M3OLMscEhEZg CDOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767800031; x=1768404831; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=sf1UcbhIiBjc/Uk94gbmf97qs8tTGqNT0DMGx4pvtTw=; b=S0peVb7SamK+t2LfIsAH1Sxe8CihTXCRPjZzeT284WEcNkgxFS23b72OxMa/sMoTyu mOJrbWE9nY/WpBLZsWrXN74JS2MzyHN1M8DpaXGYDecLkB1o6S294+YSD1je6wSc2Ta6 kCWWdufIc+BvohrC9GVs2AdOYn9mcPbl6ryP1YuSkVDeNqqlps6Ax4wWxabtrl5XJOo9 qbhDTfLANWuligtxOAMEUjdFBu0F+Kub8wnXn+3NwnQwO79VSa0ylCc67qsijNFxtjKc SbMketVWw7NrjL83zO/0dRe3hzzq1NWGn/jMNV2qh1ChGnttn53rt0LskFz8W5j1Do58 r7Hw== X-Forwarded-Encrypted: i=1; AJvYcCWYgbsFCV7IspWvKj09CtKA7hjOzwHQM7dR8/Lg/SS21H7IyrjxhOy00bj8j6J9NuTn52WC42UHeOI5HtQ=@vger.kernel.org X-Gm-Message-State: AOJu0YzmRzeMv2CJJoxUKeeE9zrLNXuNToV/aSRLyhViT2JidYmB9Jb3 0Rkjr9s4r9gHJ4xOctzUleC/0NGUheltCuNQ6YzdsyLylA8EvLUSZ8O7 X-Gm-Gg: AY/fxX5Prur8QSGLwDWBCFZGWVoNRtAnr5UjU1e0nKfShQ4QVr2BiYm6wely2eWRQys d82IAUeRjrl0bu1B36jbE+eFS9Rh38fxpcCczIa/SlLU5SWdDn/DAiFUDqQgX0hale+bHmFgNUe XJ3pEakzfxnHt0qd3wk6dleDJ8KVHp4cDwZ0kemBMAJYyie/CY3dRiU4w/2ehUMXBnc8wxpXbpB YkzUgwRHZXzvve4m3V/M8brnFmTkzsM6Ed9hqOWTJD1KOWzPNSu2PV/Ck/xlaK7UX2zD9F+sJGI PrpaK/NrOYoM5okZIruckdIFxTH4j53O6p3FpUxYd6tz86yr7jAl2BimMCpLKqjgWl33h8ylamm bMrPmK+NTr6vcRvVUBaMUl9wuIyaQYrlf5LfwHzgMldyYfqFotZU9rEZWcnSj+XTz+gjbYOzQgk 5Yy/WTRIQPxb59JMAyew+T85gUqCXHqr2tW96R/MI/6BpR X-Google-Smtp-Source: AGHT+IEqVwo0n9Yhx+3/EIppk2vTR8GrN00AjqQRNTP0en45Aku1OwSuAXlc5vd++JGo553Ggky0EQ== X-Received: by 2002:a05:6808:1822:b0:450:3823:b607 with SMTP id 5614622812f47-45a6bf24bebmr1260765b6e.59.1767800031155; Wed, 07 Jan 2026 07:33:51 -0800 (PST) Received: from localhost.localdomain ([2603:8080:1500:3d89:a917:5124:7300:7cef]) by smtp.gmail.com with ESMTPSA id 5614622812f47-45a5e2f1de5sm2398106b6e.22.2026.01.07.07.33.49 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 07 Jan 2026 07:33:50 -0800 (PST) Sender: John Groves From: John Groves X-Google-Original-From: John Groves To: John Groves , Miklos Szeredi , Dan Williams , Bernd Schubert , Alison Schofield Cc: John Groves , Jonathan Corbet , 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 Subject: [PATCH V3 03/21] dax: Save the kva from memremap Date: Wed, 7 Jan 2026 09:33:12 -0600 Message-ID: <20260107153332.64727-4-john@groves.net> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260107153332.64727-1-john@groves.net> References: <20260107153244.64703-1-john@groves.net> <20260107153332.64727-1-john@groves.net> 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" 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. (also fill in missing kerneldoc comment fields for struct dev_dax) Signed-off-by: John Groves --- drivers/dax/dax-private.h | 4 ++++ drivers/dax/fsdev.c | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h index 0867115aeef2..1bb1631af485 100644 --- a/drivers/dax/dax-private.h +++ b/drivers/dax/dax-private.h @@ -69,18 +69,22 @@ 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 * @id: ida allocated id when the dax_region is not static * @ida: mapping id allocator * @dev - device core * @pgmap - pgmap for memmap setup / lifetime (driver owned) + * @memmap_on_memory - allow kmem to put the memmap in the memory * @nr_range: size of @ranges * @ranges: range tuples of memory used */ 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 2a3249d1529c..c5c660b193e5 100644 --- a/drivers/dax/fsdev.c +++ b/drivers/dax/fsdev.c @@ -235,6 +235,7 @@ static int fsdev_dax_probe(struct dev_dax *dev_dax) pr_debug("%s: offset detected phys=3D%llx pgmap_phys=3D%llx offset=3D%ll= x\n", __func__, phys, pgmap_phys, data_offset); } + dev_dax->virt_addr =3D addr + data_offset; =20 inode =3D dax_inode(dax_dev); cdev =3D inode->i_cdev; --=20 2.49.0