From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87BBEC433EF for ; Tue, 19 Jul 2022 13:08:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243175AbiGSNIL (ORCPT ); Tue, 19 Jul 2022 09:08:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243066AbiGSNHn (ORCPT ); Tue, 19 Jul 2022 09:07:43 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56AA1B9A2E; Tue, 19 Jul 2022 05:27:28 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8FC7B61921; Tue, 19 Jul 2022 12:26:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82A2CC341C6; Tue, 19 Jul 2022 12:26:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1658233612; bh=NHn0yPM9W+29gfs+hlxD9lUActx7AsYKzs0vYg0YH+Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rgg+NwymaJGU1YIPq9wOa5HaBKNeQUFKt631VoTMY76DoEsQK5bcyQI54wfbaamkA UWrZe7IwiLRoFCX2TCy/583d2wFAvf7HPEIYv86tGNxRTnvwNPug8py2NYU4Sg6RXb OWrxpW/kN3YTFCIbkGPFm4cAAyPrXqgZwR4EvzF0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Arnd Bergmann , Linus Walleij , "Russell King (Oracle)" , Sasha Levin Subject: [PATCH 5.18 152/231] ARM: 9212/1: domain: Modify Kconfig help text Date: Tue, 19 Jul 2022 13:53:57 +0200 Message-Id: <20220719114727.105994758@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220719114714.247441733@linuxfoundation.org> References: <20220719114714.247441733@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Linus Walleij [ Upstream commit 2bf6204240fddb22cc4940b9e3f40c538390212e ] After the removal of set_fs() the reference to set_fs() is stale. Alter the helptext to reflect what the config option really does. Fixes: 8ac6f5d7f84b ("ARM: 9113/1: uaccess: remove set_fs() implementation") Acked-by: Arnd Bergmann Signed-off-by: Linus Walleij Signed-off-by: Russell King (Oracle) Signed-off-by: Sasha Levin --- arch/arm/mm/Kconfig | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index d30ee26ccc87..6284914f4361 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -631,7 +631,11 @@ config CPU_USE_DOMAINS bool help This option enables or disables the use of domain switching - via the set_fs() function. + using the DACR (domain access control register) to protect memory + domains from each other. In Linux we use three domains: kernel, user + and IO. The domains are used to protect userspace from kernelspace + and to handle IO-space as a special type of memory by assigning + manager or client roles to running code (such as a process). config CPU_V7M_NUM_IRQ int "Number of external interrupts connected to the NVIC" -- 2.35.1