linux-kernel - Re: [PATCH v2] mm/ksm: introduce ksm

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Date:   Sat, 7 May 2022 12:49:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     cgel.zte@...il.com, akpm@...ux-foundation.org
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        keescook@...omium.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        xu xin <xu.xin16@....com.cn>,
        Yang Yang <yang.yang29@....com.cn>,
        Ran Xiaokai <ran.xiaokai@....com.cn>,
        wangyong <wang.yong12@....com.cn>,
        Yunkai Zhang <zhang.yunkai@....com.cn>
Subject: Re: [PATCH v2] mm/ksm: introduce ksm_force for each process

Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on next-20220506]
[cannot apply to hnaz-mm/master kees/for-next/pstore linus/master v5.18-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/intel-lab-lkp/linux/commits/cgel-zte-gmail-com/mm-ksm-introduce-ksm_force-for-each-process/20220507-094557
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
config: hexagon-randconfig-r045-20220506 (https://download.01.org/0day-ci/archive/20220507/202205071229.7ltA0xmX-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af4cf1c6b8ed0d8102fc5e69acdc2fcbbcdaa9a7)
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/intel-lab-lkp/linux/commit/bc6a122b9e10290755c811e7fa23dd60d39303e2
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review cgel-zte-gmail-com/mm-ksm-introduce-ksm_force-for-each-process/20220507-094557
        git checkout bc6a122b9e10290755c811e7fa23dd60d39303e2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> mm/ksm.c:343:3: error: use of undeclared identifier 'turn'
                   turn false;
                   ^
   1 error generated.


vim +/turn +343 mm/ksm.c

   336	
   337	/* Check if vma is qualified for ksmd scanning */
   338	static bool ksm_vma_check(struct vm_area_struct *vma)
   339	{
   340		unsigned long vm_flags = vma->vm_flags;
   341	
   342		if (!(vma->vm_flags & VM_MERGEABLE) && !(vma->vm_mm->ksm_force))
 > 343			turn false;
   344	
   345		if (vm_flags & (VM_SHARED	| VM_MAYSHARE	|
   346				VM_PFNMAP	| VM_IO | VM_DONTEXPAND |
   347				VM_HUGETLB	| VM_MIXEDMAP))
   348			return false;       /* just ignore this vma*/
   349	
   350		if (vma_is_dax(vma))
   351			return false;
   352	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp