linux-kernel - [djbw-nvdimm:libnvdimm-pending 14/20] include/linux/dax.h:330:24: error: 'PMD_SHIFT' undeclared; did you mean 'PUD

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Message-ID: <202210091230.HvoN3fuJ-lkp@intel.com>
Date:   Sun, 9 Oct 2022 12:22:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [djbw-nvdimm:libnvdimm-pending 14/20] include/linux/dax.h:330:24:
 error: 'PMD_SHIFT' undeclared; did you mean 'PUD_SHIFT'?

Hi Dan,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git libnvdimm-pending
head:   911d658201acc386472f976e5fd2d48b9e45fdce
commit: 13b7b0af2665d99f48a1888edb2636a222523f04 [14/20] devdax: Move address_space helpers to the DAX core
config: m68k-allnoconfig
compiler: m68k-linux-gcc (GCC) 12.1.0
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://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git/commit/?id=13b7b0af2665d99f48a1888edb2636a222523f04
        git remote add djbw-nvdimm https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git
        git fetch --no-tags djbw-nvdimm libnvdimm-pending
        git checkout 13b7b0af2665d99f48a1888edb2636a222523f04
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from mm/readahead.c:118:
   include/linux/dax.h: In function 'pe_order':
>> include/linux/dax.h:330:24: error: 'PMD_SHIFT' undeclared (first use in this function); did you mean 'PUD_SHIFT'?
     330 |                 return PMD_SHIFT - PAGE_SHIFT;
         |                        ^~~~~~~~~
         |                        PUD_SHIFT
   include/linux/dax.h:330:24: note: each undeclared identifier is reported only once for each function it appears in
   In file included from include/asm-generic/pgtable-nopud.h:7,
                    from arch/m68k/include/asm/pgtable_no.h:5,
                    from arch/m68k/include/asm/pgtable.h:3,
                    from include/linux/pgtable.h:6,
                    from include/linux/mm.h:29,
                    from arch/m68k/include/asm/cacheflush_no.h:8,
                    from arch/m68k/include/asm/cacheflush.h:3,
                    from include/linux/cacheflush.h:5,
                    from include/linux/highmem.h:8,
                    from include/linux/bvec.h:10,
                    from include/linux/blk_types.h:10,
                    from include/linux/blkdev.h:9,
                    from mm/readahead.c:116:
>> include/asm-generic/pgtable-nop4d.h:11:33: error: 'PGDIR_SHIFT' undeclared (first use in this function); did you mean 'PUD_SHIFT'?
      11 | #define P4D_SHIFT               PGDIR_SHIFT
         |                                 ^~~~~~~~~~~
   include/asm-generic/pgtable-nopud.h:18:25: note: in expansion of macro 'P4D_SHIFT'
      18 | #define PUD_SHIFT       P4D_SHIFT
         |                         ^~~~~~~~~
   include/linux/dax.h:332:24: note: in expansion of macro 'PUD_SHIFT'
     332 |                 return PUD_SHIFT - PAGE_SHIFT;
         |                        ^~~~~~~~~


vim +330 include/linux/dax.h

   324	
   325	static inline unsigned int pe_order(enum page_entry_size pe_size)
   326	{
   327		if (pe_size == PE_SIZE_PTE)
   328			return PAGE_SHIFT - PAGE_SHIFT;
   329		if (pe_size == PE_SIZE_PMD)
 > 330			return PMD_SHIFT - PAGE_SHIFT;
   331		if (pe_size == PE_SIZE_PUD)
   332			return PUD_SHIFT - PAGE_SHIFT;
   333		return ~0;
   334	}
   335	

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

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