From patchwork Fri Dec 3 05:11:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 12694585 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 404B8C433EF for ; Fri, 3 Dec 2021 05:20:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aVIAosgFv9u9kDDmctsBnSqZMRVV4Zv0q72fn3dBr3s=; b=NH06hngdZzrItA gZeXJ805nxqJOuaqrmjwfjIAqhwbiTY7cnIh9U8sfvSe7CkecNTWZDjPMm0Ju13D91m0RhgiKkLvA 14yqq03KEOzssmk4L5NpDF4Q/f65cnqfTzM/LDkl8alnwCppiUCHM+GyAx+Jtp01PmBhyEaudHT0F ipMvjFSzMisEy1J9IWJFyTy+l9wg+efZY93/jZ4JnP4bRimYmONR+97Q8kkNFB4VwyK7BtNsf/M9+ iVh+pYGCC9vU3h+nZkpMlSC0rbc4LsAizNzVU3xAyhF8pk0gDC1bjPbWXTmYAu4EEVDloXAQVMCVi fi43+RSph5JlbJTKCDrQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mt0yr-00EMBL-CM; Fri, 03 Dec 2021 05:19:33 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mt0yb-00EM4k-Bd; Fri, 03 Dec 2021 05:19:18 +0000 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 E58E962956; Fri, 3 Dec 2021 05:19:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D838CC53FAD; Fri, 3 Dec 2021 05:19:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638508756; bh=Pwe0wYHKG5lxvAb6z5/hTI+22/H72lsdHUeOXryUv9w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SQwA+lKlGMNL5+ZkG7fJpteCU1piW7MSKcUDcDOMfJURL53112HoSUivtVDIQCJiP VWXAID0dxXH0vkl/fKdMXC64Li71glf4sdbelM1ePF123whpN3CxzO5sQ19+Y2vxbB iAXdJyYE82EhSthCH4WnMQkVD7Od2ZIGSNPAk42hZEYNLF4liT7QVFHzu4SIEdBw5P j8oAiWpE/h62SA+diLe3gNQWcfrkXTuleSNcGg2+QZQe/TpT34DSvQgL9YZwJys8Dk 4wiirN0zV2EkksxpTmadF5ewDJt/IlWbtu9HiilkY3W+c5OBXHQuZj7jKeZ9Tvvvx2 KeKEISnvy75Kg== From: Jisheng Zhang To: Russell King , Catalin Marinas , Paul Walmsley , Will Deacon , Palmer Dabbelt , Albert Ou , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, hpa@zytor.com, Eric Biederman , Alexandre Ghiti Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, kexec@lists.infradead.org Subject: [RFC PATCH 1/5] kexec: make crashk_res, crashk_low_res and crash_notes symbols always visible Date: Fri, 3 Dec 2021 13:11:53 +0800 Message-Id: <20211203051157.2160-2-jszhang@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211203051157.2160-1-jszhang@kernel.org> References: <20211203051157.2160-1-jszhang@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211202_211917_502461_3C356073 X-CRM114-Status: GOOD ( 13.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Make the forward declarations of crashk_res, crashk_low_res and crash_notes always visible. Code referring to these symbols can then just check for IS_ENABLED(CONFIG_KEXEC_CORE), instead of requiring conditional compilation using an #ifdef, thus preparing to increase compile coverage and simplify the code. Signed-off-by: Jisheng Zhang --- include/linux/kexec.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 0c994ae37729..58d1b58a971e 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -20,6 +20,12 @@ #include +/* Location of a reserved region to hold the crash kernel. + */ +extern struct resource crashk_res; +extern struct resource crashk_low_res; +extern note_buf_t __percpu *crash_notes; + #ifdef CONFIG_KEXEC_CORE #include #include @@ -350,12 +356,6 @@ extern int kexec_load_disabled; #define KEXEC_FILE_FLAGS (KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | \ KEXEC_FILE_NO_INITRAMFS) -/* Location of a reserved region to hold the crash kernel. - */ -extern struct resource crashk_res; -extern struct resource crashk_low_res; -extern note_buf_t __percpu *crash_notes; - /* flag to track if kexec reboot is in progress */ extern bool kexec_in_progress;