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 X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C056C4346D for ; Sat, 19 Sep 2020 04:20:37 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BA30821D43 for ; Sat, 19 Sep 2020 04:20:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="tZLnN090" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA30821D43 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5F6DE6B0072; Sat, 19 Sep 2020 00:20:36 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4E38D6B0073; Sat, 19 Sep 2020 00:20:36 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 35A7B6B0074; Sat, 19 Sep 2020 00:20:36 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0154.hostedemail.com [216.40.44.154]) by kanga.kvack.org (Postfix) with ESMTP id 1F88B6B0072 for ; Sat, 19 Sep 2020 00:20:36 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id DF9E5181AEF1E for ; Sat, 19 Sep 2020 04:20:35 +0000 (UTC) X-FDA: 77278509630.13.fruit11_4f0266b27130 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id BAD0C18140B67 for ; Sat, 19 Sep 2020 04:20:35 +0000 (UTC) X-HE-Tag: fruit11_4f0266b27130 X-Filterd-Recvd-Size: 3264 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf18.hostedemail.com (Postfix) with ESMTP for ; Sat, 19 Sep 2020 04:20:35 +0000 (UTC) Received: from localhost.localdomain (c-71-198-47-131.hsd1.ca.comcast.net [71.198.47.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6A707221EC; Sat, 19 Sep 2020 04:20:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600489234; bh=gk24wV3WVTBzPPveOonr3cUF08YOq2VfR9ge8keh9dM=; h=Date:From:To:Subject:In-Reply-To:From; b=tZLnN09029tAVv8NDjQJhlC9HLbZzxw714rJMVi+IAy5F0jXzA31BxaAHTDSjvOoQ iUc1sKZhaLlWgD9kclr3+nc8BrVd29M6WMv1SFewofQbg88dkewH/GhBfIkKzd1iBd vtBCCFpYXPPRPNqM37kqDYXVz5NGxLRzaztQRmDg= Date: Fri, 18 Sep 2020 21:20:34 -0700 From: Andrew Morton To: akpm@linux-foundation.org, hch@lst.de, linux-mm@kvack.org, mm-commits@vger.kernel.org, tklauser@distanz.ch, torvalds@linux-foundation.org, viro@zeniv.linux.org.uk Subject: [patch 12/15] ftrace: let ftrace_enable_sysctl take a kernel pointer buffer Message-ID: <20200919042034.zNxoolnD3%akpm@linux-foundation.org> In-Reply-To: <20200918211925.7e97f0ef63d92f5cfe5ccbc5@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Tobias Klauser Subject: ftrace: let ftrace_enable_sysctl take a kernel pointer buffer Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler") changed ctl_table.proc_handler to take a kernel pointer. Adjust the signature of ftrace_enable_sysctl to match ctl_table.proc_handler which fixes the following sparse warning: kernel/trace/ftrace.c:7544:43: warning: incorrect type in argument 3 (different address spaces) kernel/trace/ftrace.c:7544:43: expected void * kernel/trace/ftrace.c:7544:43: got void [noderef] __user *buffer Link: https://lkml.kernel.org/r/20200907093207.13540-1-tklauser@distanz.ch Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler") Signed-off-by: Tobias Klauser Cc: Christoph Hellwig Cc: Al Viro Signed-off-by: Andrew Morton --- include/linux/ftrace.h | 3 +-- kernel/trace/ftrace.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) --- a/include/linux/ftrace.h~ftrace-let-ftrace_enable_sysctl-take-a-kernel-pointer-buffer +++ a/include/linux/ftrace.h @@ -85,8 +85,7 @@ static inline int ftrace_mod_get_kallsym extern int ftrace_enabled; extern int ftrace_enable_sysctl(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos); + void *buffer, size_t *lenp, loff_t *ppos); struct ftrace_ops; --- a/kernel/trace/ftrace.c~ftrace-let-ftrace_enable_sysctl-take-a-kernel-pointer-buffer +++ a/kernel/trace/ftrace.c @@ -7531,8 +7531,7 @@ static bool is_permanent_ops_registered( int ftrace_enable_sysctl(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { int ret = -ENODEV; _