From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751251AbeDDJyo (ORCPT ); Wed, 4 Apr 2018 05:54:44 -0400 Received: from mout.kundenserver.de ([212.227.126.134]:36883 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750736AbeDDJyn (ORCPT ); Wed, 4 Apr 2018 05:54:43 -0400 From: Arnd Bergmann To: Dan Williams , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Shaohua Li Cc: Arnd Bergmann , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] dm: fix DAX dependency Date: Wed, 4 Apr 2018 11:54:15 +0200 Message-Id: <20180404095427.2537184-1-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 X-Provags-ID: V03:K1:XF3krF2cufn5ZqbP1HwLxfM9yMhIKbJ0j+SUPY/m6Jgd7+zUvrc dBe7Tapg94uK6OvZ7XQh3GeSLkg9K3Oic0yNIAw287U+QpUfU8fmnLqM+wM+rb+BvkkM8Zu Zg2EJ0a9Hpq1ONgNgEN3xzYtWs3/t6KPPxPt3cUYzKuIg/Eb0OuJ280OiRx+hzCyhzIpZna SrRikSFiky6l/69apegbg== X-UI-Out-Filterresults: notjunk:1;V01:K0:nSWNP0NIF80=:ldmkHYkY5GMm6bSTtb/Coo oRUrLxXzhmMXyOwh2V1tqqBGBgZSs+9J9nu9/BzT6KldwJLlyU4VBFnyhDP+p8UQNuVsEJ8zN ZkTXQb1TDkqsKNK/FwVV7NnXF0cWyD1az2OXJx/oOu0XZ6FQLswJL8B/Cc1mGylmDR1eKWQ/t SCmVEphXOoEW5Dxf8SnPqKmsF335xrTQZmXOf77RYJTWLbytDNM4g71JfQIfHv54QaKNhDzNg WnY3+pA3vGubntstyDR2UwQiMkhqXkKpx48a656oc2m7V6iWu1be6FY3zmldQiWUXGFP1O3CC M/+Aad85y9PtKsjATBCeZZBYieKKlbbUHA+V/fz2viPHN+OEUy8U/IJIFlEoixRW+NlXF5pCj vk2Gm5p6itWzMXgTxs4YSvtnetPjO+mhCRto9TX0G8H2tcFcz39/Wjrdaikb8nSd10yHJtRS2 zhh1uUJyl8Vd6buxl5KfmHRKuiFL+ss2Q4aqw4mcz6dvOlcK6PgurzP9gg9/CPxUrnJ7PpdaC xK7pd+fSq+bh62vNbvH61mqMGiT55toiG0fG2LKxVC5MVgIm9GkJV+kVosLxigFTU5zXjPTyf W+5F3D4AdN/QMnRm6k3Ul3/zbV1UcWokGzsz2I/ScdAQAs+kI521Ipe9DXHGg7ED8f5MKFDtU QISknX5IC9wXJ1rS3jQdXtRK8PlnN0O8zkG7cM77RSSJB0xhLWnafLM7htCsbT72ikI6FgL9x NQ1Iu8pSzXCwnvNGCBpc+6KQugc69y2n5c7Fhg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Building device mapper with CONFIG_DAX=m now results in a link error: drivers/md/dm.o: In function `dm_put_table_device': dm.c:(.text+0x33c): undefined reference to `put_dax' drivers/md/dm.o: In function `cleanup_mapped_device': dm.c:(.text+0x1054): undefined reference to `kill_dax' dm.c:(.text+0x105c): undefined reference to `put_dax' drivers/md/dm.o: In function `dm_get_table_device': dm.c:(.text+0x2744): undefined reference to `dax_get_by_host' drivers/md/dm-table.o: In function `device_dax_write_cache_enabled': dm-table.c:(.text+0x1030): undefined reference to `dax_write_cache_enabled' drivers/md/dm-table.o: In function `dm_table_set_restrictions': dm-table.c:(.text+0x29b8): undefined reference to `dax_write_cache' This adds a dependency that prevents the invalid configuration, allowing a built-in device mapper only if DAX is either built-in as well, or completely disabled. Fixes: 4de1c562f7e9 ("dax, dm: allow device-mapper to operate without dax support") Signed-off-by: Arnd Bergmann --- The regression only showed up in linux-next at the start of the merge window. Any idea what happened? --- drivers/md/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 49287135b86c..5e5a47c5ff82 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -200,6 +200,7 @@ config BLK_DEV_DM_BUILTIN config BLK_DEV_DM tristate "Device mapper support" + depends on DAX || DAX=n select BLK_DEV_DM_BUILTIN ---help--- Device-mapper is a low level volume manager. It works by allowing -- 2.9.0