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[192.55.52.93]) by mx.google.com with ESMTPS id a23si3810082pls.338.2019.03.03.14.07.25 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 03 Mar 2019 14:07:25 -0800 (PST) Received-SPF: pass (google.com: domain of lkp@intel.com designates 192.55.52.93 as permitted sender) client-ip=192.55.52.93; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lkp@intel.com designates 192.55.52.93 as permitted sender) smtp.mailfrom=lkp@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.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) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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