From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4CA1B1662E9; Fri, 24 Jan 2025 23:12:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737760357; cv=none; b=XvqJ8zFtAkUTz275nGUCBP/3m+gkPL6AuwZ/foqY/P5C1SW4mP25mST5WxMZYuBbT3nOWwyELKr2lk7UgmXQHqRDL944VhMdlNOiNcU6cWPL43afaXGOy6J+K1yVg9S9tx5emeyiiFNO2CryAzRicH/Ig1GZpByYlrSDIlLl3Vc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737760357; c=relaxed/simple; bh=L3WHI39ub+IfOmYLfZG/D8gWhGc5d6UctRzp5hqrnA4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jIGfAJXmhTXhu5HmVsTU9Tu802u5Gy34hTJE07DFf+KPVLju74rNlmpmdlAeF1S1Yyd9ynCOqnuIfHBs25eyDk4dOqZOm4AwmquhpLm2Whc2dmiDznegDr9UGLWDDqfQIk0rP122018GGoasCYfDazZeaei8DRutzxuGdnEwPUk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NzyMX2d2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NzyMX2d2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0EE18C4CED2; Fri, 24 Jan 2025 23:12:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737760357; bh=L3WHI39ub+IfOmYLfZG/D8gWhGc5d6UctRzp5hqrnA4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NzyMX2d2pyO5yqSGCnxldsMAAR5wJjsQGckAC4Dyvmsf9OaSuQ7c5ruUVa1qmm0aI DHt4BXzhqakQQPoQjd6GuSmK7UJ3XAhDqjKbaRHuicigvZr0f+6Dkq10jOQcfqjhft ToMhWZ6bqMjUeHuz58hHx8rmDQeyyQQPRTvzVeIQpQuoo3ZJTvyGl3JwZ7lFMtZwah BFZQ1h2ULdbHqzraZfmv1spR5oP6mKfWXnPMv1ooGlDTbsSklrBQkKbLpxaDBNBdYC 4z5PPpju+0iDrBjRwUKFuQX4Hp7Vm6Us+jp/TjIMFdUME8WXD91kA1vG19grbB1SgI 64soyhlV9ewFw== Date: Fri, 24 Jan 2025 13:12:36 -1000 From: Tejun Heo To: Sebastian Andrzej Siewior Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Michal =?iso-8859-1?Q?Koutn=FD?= , "Paul E. McKenney" , Boqun Feng , Greg Kroah-Hartman , Hillf Danton , Johannes Weiner , Marco Elver , Zefan Li , tglx@linutronix.de Subject: Re: [PATCH v4 3/6] kernfs: Acquire kernfs_rwsem in kernfs_node_dentry(). Message-ID: References: <20250124174614.866884-1-bigeasy@linutronix.de> <20250124174614.866884-4-bigeasy@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250124174614.866884-4-bigeasy@linutronix.de> On Fri, Jan 24, 2025 at 06:46:11PM +0100, Sebastian Andrzej Siewior wrote: > kernfs_node_dentry() passes kernfs_node::name to > lookup_positive_unlocked(). > > Acquire kernfs_root::kernfs_rwsem to ensure the node is not renamed > during the operation. > > Signed-off-by: Sebastian Andrzej Siewior Acked-by: Tejun Heo Thanks. -- tejun