From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B772C43381 for ; Sun, 3 Mar 2019 22:07:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9ADA20842 for ; Sun, 3 Mar 2019 22:07:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725998AbfCCWHZ (ORCPT ); Sun, 3 Mar 2019 17:07:25 -0500 Received: from mga03.intel.com ([134.134.136.65]:51307 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725923AbfCCWHZ (ORCPT ); Sun, 3 Mar 2019 17:07:25 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Mar 2019 14:07:24 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,437,1544515200"; d="scan'208";a="122332855" Received: from lkp-server01.sh.intel.com (HELO lkp-server01) ([10.239.97.150]) by orsmga008.jf.intel.com with ESMTP; 03 Mar 2019 14:07:23 -0800 Received: from kbuild by lkp-server01 with local (Exim 4.89) (envelope-from ) id 1h0ZGU-0009JX-G5; Mon, 04 Mar 2019 06:07:22 +0800 Date: Mon, 4 Mar 2019 06:07:18 +0800 From: kbuild test robot To: Andrey Konovalov Cc: kbuild-all@01.org, linux-kernel@vger.kernel.org, Andrey Ryabinin , Dmitry Vyukov , Andrew Morton , Linux Memory Management List Subject: mm/kasan/init.c:44:8-9: WARNING: return of 0/1 in function 'kasan_p4d_table' with return type bool Message-ID: <201903040615.AFuPIoDo%fengguang.wu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Andrey, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c027c7cf1577bc2333449447c6e48c93126a56b0 commit: b938fcf42739de8270e6ea41593722929c8a7dd0 kasan: rename source files to reflect the new naming scheme date: 9 weeks ago coccinelle warnings: (new ones prefixed by >>) >> mm/kasan/init.c:44:8-9: WARNING: return of 0/1 in function 'kasan_p4d_table' with return type bool >> mm/kasan/init.c:68:8-9: WARNING: return of 0/1 in function 'kasan_pmd_table' with return type bool >> mm/kasan/init.c:56:8-9: WARNING: return of 0/1 in function 'kasan_pud_table' with return type bool vim +/kasan_p4d_table +44 mm/kasan/init.c 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 34 c2febafc6 mm/kasan/kasan_init.c Kirill A. Shutemov 2017-03-09 35 #if CONFIG_PGTABLE_LEVELS > 4 c65e774fb mm/kasan/kasan_init.c Kirill A. Shutemov 2018-02-14 36 p4d_t kasan_zero_p4d[MAX_PTRS_PER_P4D] __page_aligned_bss; 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 37 static inline bool kasan_p4d_table(pgd_t pgd) 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 38 { 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 39 return pgd_page(pgd) == virt_to_page(lm_alias(kasan_zero_p4d)); 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 40 } 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 41 #else 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 42 static inline bool kasan_p4d_table(pgd_t pgd) 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 43 { 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 @44 return 0; 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 45 } c2febafc6 mm/kasan/kasan_init.c Kirill A. Shutemov 2017-03-09 46 #endif 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 47 #if CONFIG_PGTABLE_LEVELS > 3 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 48 pud_t kasan_zero_pud[PTRS_PER_PUD] __page_aligned_bss; 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 49 static inline bool kasan_pud_table(p4d_t p4d) 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 50 { 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 51 return p4d_page(p4d) == virt_to_page(lm_alias(kasan_zero_pud)); 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 52 } 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 53 #else 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 54 static inline bool kasan_pud_table(p4d_t p4d) 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 55 { 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 @56 return 0; 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 57 } 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 58 #endif 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 59 #if CONFIG_PGTABLE_LEVELS > 2 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 60 pmd_t kasan_zero_pmd[PTRS_PER_PMD] __page_aligned_bss; 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 61 static inline bool kasan_pmd_table(pud_t pud) 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 62 { 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 63 return pud_page(pud) == virt_to_page(lm_alias(kasan_zero_pmd)); 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 64 } 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 65 #else 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 66 static inline bool kasan_pmd_table(pud_t pud) 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 67 { 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 @68 return 0; 0207df4fa mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 69 } 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 70 #endif 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 71 pte_t kasan_zero_pte[PTRS_PER_PTE] __page_aligned_bss; 69786cdb3 mm/kasan/kasan_init.c Andrey Ryabinin 2015-08-13 72 :::::: The code at line 44 was first introduced by commit :::::: 0207df4fa1a869281ddbf72db6203dbf036b3e1a kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN :::::: TO: Andrey Ryabinin :::::: CC: Linus Torvalds --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation