linux-kernel - arch/arm/mm/kasan_init.c:30:7: sparse: sparse: symbol 'tmp_pmd_table' was not declared. Should it be static?

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Date:   Thu, 13 May 2021 04:36:26 +0800
From:   kernel test robot <lkp@...el.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Russell King <rmk+kernel@...linux.org.uk>,
        Ard Biesheuvel <ardb@...nel.org>,
        Abbott Liu <liuwenliang@...wei.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: arch/arm/mm/kasan_init.c:30:7: sparse: sparse: symbol
 'tmp_pmd_table' was not declared. Should it be static?

Hi Stephen,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dbb5afad100a828c97e012c6106566d99f041db6
commit: 421015713b306e47af95d4d61cdfbd96d462e4cb ARM: 9017/2: Enable KASan for ARM
date:   7 months ago
config: arm-randconfig-s032-20210513 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=421015713b306e47af95d4d61cdfbd96d462e4cb
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 421015713b306e47af95d4d61cdfbd96d462e4cb
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
>> arch/arm/mm/kasan_init.c:30:7: sparse: sparse: symbol 'tmp_pmd_table' was not declared. Should it be static?
--
>> drivers/mtd/nand/onenand/onenand_omap2.c:385:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const *src @@     got void [noderef] __iomem * @@
   drivers/mtd/nand/onenand/onenand_omap2.c:385:17: sparse:     expected void const *src
   drivers/mtd/nand/onenand/onenand_omap2.c:385:17: sparse:     got void [noderef] __iomem *
   drivers/mtd/nand/onenand/onenand_omap2.c:404:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const *src @@     got void [noderef] __iomem * @@
   drivers/mtd/nand/onenand/onenand_omap2.c:404:9: sparse:     expected void const *src
   drivers/mtd/nand/onenand/onenand_omap2.c:404:9: sparse:     got void [noderef] __iomem *
>> drivers/mtd/nand/onenand/onenand_omap2.c:444:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *dest @@     got void [noderef] __iomem * @@
   drivers/mtd/nand/onenand/onenand_omap2.c:444:9: sparse:     expected void *dest
   drivers/mtd/nand/onenand/onenand_omap2.c:444:9: sparse:     got void [noderef] __iomem *

vim +/tmp_pmd_table +30 arch/arm/mm/kasan_init.c

5615f69bc20974 Linus Walleij 2020-10-25  29  
5615f69bc20974 Linus Walleij 2020-10-25 @30  pmd_t tmp_pmd_table[PTRS_PER_PMD] __page_aligned_bss;
5615f69bc20974 Linus Walleij 2020-10-25  31  

:::::: The code at line 30 was first introduced by commit
:::::: 5615f69bc2097452ecc954f5264d784e158d6801 ARM: 9016/2: Initialize the mapping of KASan shadow memory

:::::: TO: Linus Walleij <linus.walleij@...aro.org>
:::::: CC: Russell King <rmk+kernel@...linux.org.uk>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (36117 bytes)