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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 D21A7C43462 for ; Wed, 12 May 2021 16:55:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99CAD6112D for ; Wed, 12 May 2021 16:55:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240580AbhELQz7 (ORCPT ); Wed, 12 May 2021 12:55:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:35488 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243963AbhELQmT (ORCPT ); Wed, 12 May 2021 12:42:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C871061C56; Wed, 12 May 2021 16:08:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835724; bh=cR7PS7IAQOEv8/KE5wKy1EqdcXGIp3+Z0cIYXc9C8CY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n6wN+DuRzXwEhy0+pNkfLypC96Chfc01GXqRsX5Rz/KjcAqu0JdGOic0DrizguAd9 qrix1EwR2afWzCXmA7e0C+2YCjc9Z3Fc6wjp/5A4QHWxjtgrBNJlfew04CddhBXmqZ Lsw0JNBzFBkjXAxILnv2n+iyzEkcyuoFlYL3jCdw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sebastian Andrzej Siewior , Michael Ellerman , Sasha Levin Subject: [PATCH 5.12 460/677] powerpc/mm: Move the linear_mapping_mutex to the ifdef where it is used Date: Wed, 12 May 2021 16:48:26 +0200 Message-Id: <20210512144852.643780824@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@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: stable@vger.kernel.org From: Sebastian Andrzej Siewior [ Upstream commit 9be77e11dade414d2fa63750aa5c754fac49d619 ] The mutex linear_mapping_mutex is defined at the of the file while its only two user are within the CONFIG_MEMORY_HOTPLUG block. A compile without CONFIG_MEMORY_HOTPLUG set fails on PREEMPT_RT because its mutex implementation is smart enough to realize that it is unused. Move the definition of linear_mapping_mutex to ifdef block where it is used. Fixes: 1f73ad3e8d755 ("powerpc/mm: print warning in arch_remove_linear_mapping()") Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210219165648.2505482-1-bigeasy@linutronix.de Signed-off-by: Sasha Levin --- arch/powerpc/mm/mem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 4e8ce6d85232..7a59a5c9aa5d 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -54,7 +54,6 @@ #include -static DEFINE_MUTEX(linear_mapping_mutex); unsigned long long memory_limit; bool init_mem_is_free; @@ -72,6 +71,7 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, EXPORT_SYMBOL(phys_mem_access_prot); #ifdef CONFIG_MEMORY_HOTPLUG +static DEFINE_MUTEX(linear_mapping_mutex); #ifdef CONFIG_NUMA int memory_add_physaddr_to_nid(u64 start) -- 2.30.2