From patchwork Thu Apr 23 20:31:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Chamberlain X-Patchwork-Id: 11506547 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E69B881 for ; Thu, 23 Apr 2020 20:31:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC51820728 for ; Thu, 23 Apr 2020 20:31:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587673909; bh=doFNDamFus9z1sCuhkDS6mVJuFcrInf5m+Axb3+tTmI=; h=From:To:Cc:Subject:Date:List-ID:From; b=0Cn67dUr1iFiLAarfmw7YdXeE1zemTvotUJcxrX80EKwUochEGoQHqgQqrT7Mrc86 GM+TTzS54zdCjRg9Tcpv1DmCeEWDLiLDvYu0PO3cOA9rp3+ont6Tct949R8YwMqknE 4t6Rlwh74D8kYYcVkUdr50RM7lWycix/JIrW26Nc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726081AbgDWUbq (ORCPT ); Thu, 23 Apr 2020 16:31:46 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:39271 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725934AbgDWUbq (ORCPT ); Thu, 23 Apr 2020 16:31:46 -0400 Received: by mail-pl1-f194.google.com with SMTP id k18so2809502pll.6; Thu, 23 Apr 2020 13:31:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Y6Yd6vxHdKXfNCR7irTzdhZ+vT9Aep8/YD4m/YAtVdw=; b=qNOB7/UTbJ0WPrPane5g72b+wI2CWnElQ+1GsyFof6hilH9nn57dITTjHfdxCiCq2f 5CW9lFkGUfxwqNK5P6nFR3TXevhfMAoOjC5ioZ7mlMd9Xly6jj2W37URq7SU6xwBa9gW hATHcnqRvCLuCBjWcLMWjQVQBCv07Q+7XrteTSZjliOFdS6cZTq3d4V6Lu0ksbGz8DFK 8EGfVu1D7L/YrfTb8WjXG8lhE7OX/jopd6NEAkSvv2xSlFNsqwQdOcE3ebME0AIaeucx yjd9ecWpdZiIOa7AaRNbMcpc1mPli/q/LmHr160WqLicZHqWDdOfBVMeppvvGj+B3RoI Ffyg== X-Gm-Message-State: AGi0PuZj7qNgxi3/QtXksAyipn6LwILKAob98lK7w+/vW/Jm4hjcpHea 4cAf/bpZQSDMust7kIL6hfk= X-Google-Smtp-Source: APiQypKOj073Uw8F/aSZ3X0Bvrwz5W+5tF3TTJN6agQwB0Is8Rf+PdYFuKSeUpk4MYviekLU7vhFUg== X-Received: by 2002:a17:90a:6488:: with SMTP id h8mr2613636pjj.51.1587673904498; Thu, 23 Apr 2020 13:31:44 -0700 (PDT) Received: from 42.do-not-panic.com (42.do-not-panic.com. [157.230.128.187]) by smtp.gmail.com with ESMTPSA id e11sm881707pfl.85.2020.04.23.13.31.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Apr 2020 13:31:43 -0700 (PDT) Received: by 42.do-not-panic.com (Postfix, from userid 1000) id 62B10402A1; Thu, 23 Apr 2020 20:31:42 +0000 (UTC) From: "Luis R. Rodriguez" To: gregkh@linuxfoundation.org Cc: akpm@linux-foundation.org, josh@joshtriplett.org, rishabhb@codeaurora.org, kubakici@wp.pl, maco@android.com, andy.gross@linaro.org, david.brown@linaro.org, bjorn.andersson@linaro.org, linux-wireless@vger.kernel.org, keescook@chromium.org, shuah@kernel.org, mfuzzey@parkeon.com, zohar@linux.vnet.ibm.com, dhowells@redhat.com, pali.rohar@gmail.com, tiwai@suse.de, arend.vanspriel@broadcom.com, zajec5@gmail.com, nbroeking@me.com, markivx@codeaurora.org, broonie@kernel.org, dmitry.torokhov@gmail.com, dwmw2@infradead.org, torvalds@linux-foundation.org, Abhay_Salunke@dell.com, jewalt@lgsinnovations.com, cantabile.desu@gmail.com, ast@fb.com, andresx7@gmail.com, dan.rue@linaro.org, brendanhiggins@google.com, yzaikin@google.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Luis Chamberlain , Christoph Hellwig , Randy Dunlap , Stephen Rothwell Subject: [PATCH] firmware_loader: re-export fw_fallback_config into firmware_loader's own namespace Date: Thu, 23 Apr 2020 20:31:40 +0000 Message-Id: <20200423203140.19510-1-mcgrof@kernel.org> X-Mailer: git-send-email 2.23.0.rc1 MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Luis Chamberlain Christoph's recent patch "firmware_loader: remove unused exports", which is not merged upstream yet, removed two exported symbols. One is fine to remove since only built-in code uses it but the other is incorrect. If CONFIG_FW_LOADER=m so the firmware_loader is modular but CONFIG_FW_LOADER_USER_HELPER=y we fail at mostpost with: ERROR: modpost: "fw_fallback_config" [drivers/base/firmware_loader/firmware_class.ko] undefined! This happens because the variable fw_fallback_config is built into the kernel if CONFIG_FW_LOADER_USER_HELPER=y always, so we need to grant access to the firmware loader module by exporting it. Instead of just exporting it as we used to, take advantage of the new kernel symbol namespacing functionality, and export the symbol only to the firmware loader private namespace. This would prevent misuses from other drivers and makes it clear the goal is to keep this private to the firmware loader alone. Cc: Christoph Hellwig Cc: Randy Dunlap Cc: Stephen Rothwell Fixes: "firmware_loader: remove unused exports" Reported-by: Randy Dunlap Signed-off-by: Luis Chamberlain Acked-by: Randy Dunlap Tested-by: Randy Dunlap Reviewed-by: Christoph Hellwig --- drivers/base/firmware_loader/fallback.c | 3 +++ drivers/base/firmware_loader/fallback_table.c | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c index 1e9c96e3ed63..d9ac7296205e 100644 --- a/drivers/base/firmware_loader/fallback.c +++ b/drivers/base/firmware_loader/fallback.c @@ -9,6 +9,7 @@ #include #include #include +#include #include "fallback.h" #include "firmware.h" @@ -17,6 +18,8 @@ * firmware fallback mechanism */ +MODULE_IMPORT_NS(FIRMWARE_LOADER_PRIVATE); + extern struct firmware_fallback_config fw_fallback_config; /* These getters are vetted to use int properly */ diff --git a/drivers/base/firmware_loader/fallback_table.c b/drivers/base/firmware_loader/fallback_table.c index 0a737349f78f..46a731dede6f 100644 --- a/drivers/base/firmware_loader/fallback_table.c +++ b/drivers/base/firmware_loader/fallback_table.c @@ -21,6 +21,7 @@ struct firmware_fallback_config fw_fallback_config = { .loading_timeout = 60, .old_timeout = 60, }; +EXPORT_SYMBOL_NS_GPL(fw_fallback_config, FIRMWARE_LOADER_PRIVATE); #ifdef CONFIG_SYSCTL struct ctl_table firmware_config_table[] = {