From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C77C8346AE3; Sat, 12 Sep 2026 07:40:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789198826; cv=none; b=YfVOHxLodniomobaURusMLxujHqYnAy2JeOmNZxG4rDZ/RNwzdLOS+2Hrqu0E+Ypb71FC1N5Fe20ZCLqyk2FOWJmqhP9vbgSy5LN/krrX/+jhbTcEuaFn7Z40E4xfeUJMhbBR3qDa88i4ovWZ0m1Ey5M/aOQFX0DWJoZg/YjyAQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789198826; c=relaxed/simple; bh=dAUWZ252aby51+dIgJ2PyjNzC50b98glzitD+JT5HdY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GKipuLo48VpabHNCDKatEhDFmBrCGGNLMkg5cXvn022edkbWLfHzKJ8DRLOw6p5daVTdTRDgWBWyroH1WVDrX1BowmG3L3JnBCWR0eSsy2AK5yn/3KedadYQWDezoaHWfEn1sBNx1OOyuKanuMrt/5jyyqs3Faxh3pMcSxCnU2U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CeeuQKb7; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="CeeuQKb7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE2721F000FF; Sat, 12 Sep 2026 07:40:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789198825; bh=NbcLI85BO/58IA0rDI+s2JOzZRsHLygh1YkNIU8QzIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CeeuQKb7c0EN6Ko5xyxwI/j7GV5/U7E7Mz35OuEnkxoObXnJrgQky+Baurjyay4dC eETSfTgVxO2gKoI/3OO2mxjYb1crPKi+qfODJ9eZz9jc/e+M4Qp78XKOv52civ++/O MnrKqHa4teb8pdKW7YgfHhaY/HgAmaIFcfCErj+s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dave Jiang , Alison Schofield , John Groves , Sasha Levin Subject: [PATCH 7.2 0417/1815] dax/fsdev: clear vmemmap_shift when binding static pgmap Date: Sat, 12 Sep 2026 08:36:07 +0200 Message-ID: <20260912065658.683324886@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065648.999753832@linuxfoundation.org> References: <20260912065648.999753832@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: John Groves [ Upstream commit e0239229931faf9ca3367e3befcf16f77b2cd45b ] Clear pgmap->vmemmap_shift for static DAX devices. When rebinding a static device from device_dax (which may set vmemmap_shift based on alignment) to fsdev_dax, the stale vmemmap_shift persists on the shared pgmap. Explicitly zero it before devm_memremap_pages() so the vmemmap is built for order-0 folios as fsdev requires. Fixes: d5406bd458b0a ("dax: add fsdev.c driver for fs-dax on character dax") Reviewed-by: Dave Jiang Reviewed-by: Alison Schofield Signed-off-by: John Groves Link: https://patch.msgid.link/0100019ecc090eea-7c46f51e-5393-402c-850d-78059bb6d343-000000@email.amazonses.com Signed-off-by: Alison Schofield Signed-off-by: Sasha Levin --- drivers/dax/fsdev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dax/fsdev.c b/drivers/dax/fsdev.c index f315533b299e9..dbd722ed7ab05 100644 --- a/drivers/dax/fsdev.c +++ b/drivers/dax/fsdev.c @@ -237,6 +237,7 @@ static int fsdev_dax_probe(struct dev_dax *dev_dax) } pgmap = dev_dax->pgmap; + pgmap->vmemmap_shift = 0; } else { size_t pgmap_size; -- 2.53.0