From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4ED4E20E0; Thu, 11 Jan 2024 05:14:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="TBBerVnT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1704950091; x=1736486091; h=date:from:to:cc:subject:message-id:mime-version; bh=B4Uk2RvcV5FItTKxI9nzciwuds1tZHn3YsoD/K29g2c=; b=TBBerVnTHog9QapwVFlvssC6Wp3le/axpof2bjxcRG55Zh/dfPBWjt34 muRn6BeDJ+eu7VqK7aRhZsS8USOc2C4zXVYgAMZiArFJeFz/DX6GUzw2h Q6OeccOf5/6mFL0MHoOBajW5zV77AIxa17TGeNVnsjZ+tinlhsNWnyvqs c8vQdPZWD75sMiQrr52dJURQUCqrIZTiB3077m/JZyqPNrkpN2Dh+NH2U ufRG3iasL9F07oyaJF7bDzuW1DKJEI3qv6MLMyHbQB5AZIu6B1tiOi/UE bptjCTbJROAf1U+Eg4b2ReaZ8P333wYw9VlP7n1cKPbs4oESol7/k1B5m g==; X-IronPort-AV: E=McAfee;i="6600,9927,10949"; a="5826901" X-IronPort-AV: E=Sophos;i="6.04,185,1695711600"; d="scan'208";a="5826901" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jan 2024 21:14:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10949"; a="1113705786" X-IronPort-AV: E=Sophos;i="6.04,185,1695711600"; d="scan'208";a="1113705786" Received: from lkp-server02.sh.intel.com (HELO b07ab15da5fe) ([10.239.97.151]) by fmsmga005.fm.intel.com with ESMTP; 10 Jan 2024 21:14:47 -0800 Received: from kbuild by b07ab15da5fe with local (Exim 4.96) (envelope-from ) id 1rNnOv-0007rW-1W; Thu, 11 Jan 2024 05:14:45 +0000 Date: Thu, 11 Jan 2024 13:13:59 +0800 From: kernel test robot To: "Uladzislau Rezki (Sony)" Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Linux Memory Management List , Andrew Morton Subject: [linux-next:master 12999/13245] mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here Message-ID: <202401111304.N5dkFGNe-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@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/next/linux-next.git master head: 9e21984d62c56a0f6d1fc6f76b646212cfd7fe88 commit: e88b85b81d5313a69cb62829b957d4a9ecde600b [12999/13245] mm: vmalloc: offload free_vmap_area_lock lock config: arm-defconfig (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202401111304.N5dkFGNe-lkp@intel.com/ All warnings (new ones prefixed by >>): >> mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here [-Wuninitialized] va = __find_vmap_area(addr, &vn->busy.root); ^~~~ mm/vmalloc.c:4645:20: note: initialize the variable 'addr' to silence this warning unsigned long addr; ^ = 0 1 warning generated. vim +/addr +4652 mm/vmalloc.c a10aa579878fc6 Christoph Lameter 2008-04-28 4637 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4638 #ifdef CONFIG_PRINTK 98f180837a896e Paul E. McKenney 2020-12-08 4639 bool vmalloc_dump_obj(void *object) 98f180837a896e Paul E. McKenney 2020-12-08 4640 { 98f180837a896e Paul E. McKenney 2020-12-08 4641 void *objp = (void *)PAGE_ALIGN((unsigned long)object); 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4642) const void *caller; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4643) struct vmap_area *va; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4644) struct vmap_node *vn; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4645) unsigned long addr; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4646) unsigned int nr_pages; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4647) bool success = false; 98f180837a896e Paul E. McKenney 2020-12-08 4648 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4649) vn = addr_to_node((unsigned long)objp); 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4650) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4651) if (spin_trylock(&vn->busy.lock)) { 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 @4652) va = __find_vmap_area(addr, &vn->busy.root); 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4653) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4654) if (va && va->vm) { 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4655) addr = (unsigned long)va->vm->addr; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4656) caller = va->vm->caller; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4657) nr_pages = va->vm->nr_pages; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4658) success = true; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4659) } 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4660) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4661) spin_unlock(&vn->busy.lock); 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4662) } 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4663) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4664) if (success) bd34dcd4120d7e Paul E. McKenney 2020-12-09 4665 pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n", 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4666) nr_pages, addr, caller); 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4667) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4668) return success; 98f180837a896e Paul E. McKenney 2020-12-08 4669 } 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4670 #endif 98f180837a896e Paul E. McKenney 2020-12-08 4671 :::::: The code at line 4652 was first introduced by commit :::::: 86817057732a9ce9cefdb6f513b6554a55ebbbbb mm: vmalloc: remove global vmap_area_root rb-tree :::::: TO: Uladzislau Rezki (Sony) :::::: CC: Andrew Morton -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki