linux-kernel - [norov:demotion 4/6] mm/vmscan.c:528:12: error: 'PG

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Date:   Sun, 8 Aug 2021 21:11:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Yury Norov <yury.norov@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [norov:demotion 4/6] mm/vmscan.c:528:12: error: 'PG_demote'
 undeclared

tree:   https://github.com/norov/linux demotion
head:   78c3964952da24c07f2e34dc2d485fd2e6d5ba82
commit: e71fae18b9c6ad0f0f71a1f80cff17fdb03bfc3b [4/6] mm/demotion: enable per-page demotion
config: openrisc-randconfig-r033-20210808 (attached as .config)
compiler: or1k-linux-gcc (GCC) 10.3.0
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/norov/linux/commit/e71fae18b9c6ad0f0f71a1f80cff17fdb03bfc3b
        git remote add norov https://github.com/norov/linux
        git fetch --no-tags norov demotion
        git checkout e71fae18b9c6ad0f0f71a1f80cff17fdb03bfc3b
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=openrisc 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/vmscan.c: In function 'can_demote_page':
   mm/vmscan.c:524:35: error: lvalue required as unary '&' operand
     524 |  if (test_bit(NUMA_DEMOTION_FLAG, &numa_demotion_flags))
         |                                   ^
   mm/vmscan.c:527:44: error: lvalue required as unary '&' operand
     527 |  if (test_bit(NUMA_DEMOTION_REQ_MADV_FLAG, &numa_demotion_flags) &&
         |                                            ^
>> mm/vmscan.c:528:12: error: 'PG_demote' undeclared (first use in this function)
     528 |   test_bit(PG_demote, &page->flags))
         |            ^~~~~~~~~
   mm/vmscan.c:528:12: note: each undeclared identifier is reported only once for each function it appears in
   mm/vmscan.c: In function 'can_demote':
   mm/vmscan.c:536:36: error: lvalue required as unary '&' operand
     536 |  if (!test_bit(NUMA_DEMOTION_FLAG, &numa_demotion_flags) &&
         |                                    ^
   mm/vmscan.c:537:42: error: lvalue required as unary '&' operand
     537 |   !test_bit(NUMA_DEMOTION_REQ_MADV_FLAG, &numa_demotion_flags))
         |                                          ^
   mm/vmscan.c: In function 'demote_page_list':
   mm/vmscan.c:1356:6: warning: variable 'err' set but not used [-Wunused-but-set-variable]
    1356 |  int err;
         |      ^~~


vim +/PG_demote +528 mm/vmscan.c

   521	
   522	static bool can_demote_page(struct page *page)
   523	{
   524		if (test_bit(NUMA_DEMOTION_FLAG, &numa_demotion_flags))
   525			return true;
   526	
   527		if (test_bit(NUMA_DEMOTION_REQ_MADV_FLAG, &numa_demotion_flags) &&
 > 528			test_bit(PG_demote, &page->flags))
   529			return true;
   530	
   531		return false;
   532	}
   533	

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

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