linux-kernel - Re: [PATCH v5 07/11] powerpc/mm: Use generic_get_unmapped_area() and call it from arch_get_unmapped

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Message-ID: <202112160557.ANnYN1ZQ-lkp@intel.com>
Date:   Thu, 16 Dec 2021 05:26:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "alex@...ti.fr" <alex@...ti.fr>
Cc:     kbuild-all@...ts.01.org,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "catalin.marinas@....com" <catalin.marinas@....com>
Subject: Re: [PATCH v5 07/11] powerpc/mm: Use generic_get_unmapped_area() and
 call it from arch_get_unmapped_area()

Hi Christophe,

I love your patch! Perhaps something to improve:

[auto build test WARNING on powerpc/next]
[also build test WARNING on next-20211214]
[cannot apply to hnaz-mm/master arm64/for-next/core linus/master v5.16-rc5]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Christophe-Leroy/Convert-powerpc-to-default-topdown-mmap-layout/20211215-144700
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc64-randconfig-m031-20211214 (https://download.01.org/0day-ci/archive/20211216/202112160557.ANnYN1ZQ-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/6b1717476e74918c79cc7d76b009a9e0424a4414
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Christophe-Leroy/Convert-powerpc-to-default-topdown-mmap-layout/20211215-144700
        git checkout 6b1717476e74918c79cc7d76b009a9e0424a4414
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

   In file included from arch/powerpc/include/asm/processor.h:71,
                    from arch/powerpc/include/asm/thread_info.h:40,
                    from include/linux/thread_info.h:60,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/powerpc/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:55,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/slab.h:15,
                    from mm/mmap.c:13:
   mm/mmap.c: In function 'generic_get_unmapped_area':
>> arch/powerpc/include/asm/task_size_64.h:84:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
      84 |          ((flags) & MAP_FIXED) && ((addr) + (len) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : \
         |          ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   mm/mmap.c:2142:40: note: in expansion of macro 'arch_get_mmap_end'
    2142 |         const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);
         |                                        ^~~~~~~~~~~~~~~~~
   mm/mmap.c: In function 'generic_get_unmapped_area_topdown':
>> arch/powerpc/include/asm/task_size_64.h:84:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
      84 |          ((flags) & MAP_FIXED) && ((addr) + (len) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : \
         |          ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   mm/mmap.c:2190:40: note: in expansion of macro 'arch_get_mmap_end'
    2190 |         const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);
         |                                        ^~~~~~~~~~~~~~~~~


vim +84 arch/powerpc/include/asm/task_size_64.h

    78	
    79	#define arch_get_mmap_base(addr, base) \
    80		(((addr) > DEFAULT_MAP_WINDOW) ? (base) + TASK_SIZE - DEFAULT_MAP_WINDOW : (base))
    81	
    82	#define arch_get_mmap_end(addr, len, flags) \
    83		(((addr) > DEFAULT_MAP_WINDOW) || \
  > 84		 ((flags) & MAP_FIXED) && ((addr) + (len) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : \
    85										  DEFAULT_MAP_WINDOW)
    86	

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