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d="scan'208";a="414138802" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jan 2023 10:49:22 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10607"; a="666603880" X-IronPort-AV: E=Sophos;i="5.97,261,1669104000"; d="scan'208";a="666603880" Received: from lkp-server01.sh.intel.com (HELO ffa7f14d1d0f) ([10.239.97.150]) by fmsmga007.fm.intel.com with ESMTP; 31 Jan 2023 10:49:21 -0800 Received: from kbuild by ffa7f14d1d0f with local (Exim 4.96) (envelope-from ) id 1pMvh2-0004de-2B; Tue, 31 Jan 2023 18:49:20 +0000 Date: Wed, 1 Feb 2023 02:48:25 +0800 From: kernel test robot To: Greg Kroah-Hartman Cc: oe-kbuild-all@lists.linux.dev, devel@driverdev.osuosl.org Subject: [driver-core:kobject-const 25/25] drivers/dma/idxd/compat.c:19:32: warning: initialization discards 'const' qualifier from pointer target type Message-ID: <202302010222.N9SSmGUP-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git kobject-const head: ab566595bfc8de2e05e5174796f04997d7c01fb3 commit: ab566595bfc8de2e05e5174796f04997d7c01fb3 [25/25] bus: remove the "p" pointer in struct bus_type config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230201/202302010222.N9SSmGUP-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/commit/?id=ab566595bfc8de2e05e5174796f04997d7c01fb3 git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git git fetch --no-tags driver-core kobject-const git checkout ab566595bfc8de2e05e5174796f04997d7c01fb3 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/dma/idxd/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): drivers/dma/idxd/compat.c: In function 'unbind_store': >> drivers/dma/idxd/compat.c:19:32: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 19 | struct bus_type *bus = drv->bus; | ^~~ drivers/dma/idxd/compat.c: In function 'bind_store': drivers/dma/idxd/compat.c:35:32: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 35 | struct bus_type *bus = drv->bus; | ^~~ vim +/const +19 drivers/dma/idxd/compat.c 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 12 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 13 #define DRIVER_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \ 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 14 struct driver_attribute driver_attr_##_name = \ 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 15 __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 16 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 17 static ssize_t unbind_store(struct device_driver *drv, const char *buf, size_t count) 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 18 { 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 @19 struct bus_type *bus = drv->bus; 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 20 struct device *dev; 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 21 int rc = -ENODEV; 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 22 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 23 dev = bus_find_device_by_name(bus, NULL, buf); 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 24 if (dev && dev->driver) { 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 25 device_driver_detach(dev); 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 26 rc = count; 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 27 } 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 28 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 29 return rc; 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 30 } 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 31 static DRIVER_ATTR_IGNORE_LOCKDEP(unbind, 0200, NULL, unbind_store); 6e7f3ee97bbe2c7 Dave Jiang 2021-07-15 32 :::::: The code at line 19 was first introduced by commit :::::: 6e7f3ee97bbe2c7d7a53b7dbd7a08a579e03c8c9 dmaengine: idxd: move dsa_drv support to compatible mode :::::: TO: Dave Jiang :::::: CC: Vinod Koul -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests