From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754207AbcIIR5A (ORCPT ); Fri, 9 Sep 2016 13:57:00 -0400 Received: from mga03.intel.com ([134.134.136.65]:6712 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751463AbcIIR46 (ORCPT ); Fri, 9 Sep 2016 13:56:58 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.30,306,1470726000"; d="scan'208";a="758890745" From: Ross Zwisler To: linux-kernel@vger.kernel.org Cc: Ross Zwisler , Dan Williams , linux-nvdimm@ml01.01.org Subject: [PATCH] /dev/dax: fix Kconfig dependency build breakage Date: Fri, 9 Sep 2016 11:56:52 -0600 Message-Id: <20160909175652.10267-1-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.9.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The function dax_pmem_probe() in drivers/dax/pmem.c is compiled under the CONFIG_DEV_DAX_PMEM tri-state config option. This config option currently only depends on CONFIG_NVDIMM_DAX, which means that the following configuration is possible: CONFIG_LIBNVDIMM=m ... CONFIG_NVDIMM_DAX=y CONFIG_DEV_DAX=y CONFIG_DEV_DAX_PMEM=y With this config LIBNVDIMM is compiled as a module with NVDIMM_DAX=y just meaning that we will compile drivers/nvdimm/dax_devs.c into that module. However, dax_pmem_probe() depends on several symbols defined in drivers/nvdimm/dax_devs.c, which results in the following build errors: drivers/built-in.o: In function `dax_pmem_probe': linux/drivers/dax/pmem.c:70: undefined reference to `to_nd_dax' linux/drivers/dax/pmem.c:74: undefined reference to `nvdimm_namespace_common_probe' linux/drivers/dax/pmem.c:80: undefined reference to `devm_nsio_enable' linux/drivers/dax/pmem.c:81: undefined reference to `nvdimm_setup_pfn' linux/drivers/dax/pmem.c:84: undefined reference to `devm_nsio_disable' linux/drivers/dax/pmem.c:122: undefined reference to `to_nd_region' drivers/built-in.o: In function `dax_pmem_init': linux/drivers/dax/pmem.c:147: undefined reference to `__nd_driver_register' Fix this by making CONFIG_DEV_DAX_PMEM explicitly depend on CONFIG_LIBNVDIMM. This prevents dax_devs.c from being built as a built-in while its dependencies are in the libnvdimm.ko module. Signed-off-by: Ross Zwisler --- drivers/dax/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig index cedab75..5cd9436 100644 --- a/drivers/dax/Kconfig +++ b/drivers/dax/Kconfig @@ -15,6 +15,7 @@ if DEV_DAX config DEV_DAX_PMEM tristate "PMEM DAX: direct access to persistent memory" depends on NVDIMM_DAX + depends on LIBNVDIMM default DEV_DAX help Support raw access to persistent memory. Note that this -- 2.9.0