[akpm-mm:mm-unstable 187/225] arch/m68k/include/asm/page.h:20:27: error: lvalue required as unary '&' operand

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   0f409ed671a46de4b172899f7814a5bf37a33d86
commit: 00cd88c03fd1c3242be5726998b3bf47afbf17a1 [187/225] mm/rmap: extend rmap and migration support device-private entries
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20250916/202509160214.gDtkbWC8-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250916/202509160214.gDtkbWC8-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202509160214.gDtkbWC8-lkp@intel.com/ (local)

All errors (new ones prefixed by >>):

   In file included from include/linux/build_bug.h:5,
                    from include/linux/init.h:5,
                    from mm/page_idle.c:2:
   mm/page_idle.c: In function 'page_idle_clear_pte_refs_one':

quoted

arch/m68k/include/asm/page.h:20:27: error: lvalue required as unary '&' operand

      20 | #define pmd_val(x)      ((&x)->pmd)
         |                           ^
   include/linux/compiler.h:76:45: note: in definition of macro 'likely'
      76 | # define likely(x)      __builtin_expect(!!(x), 1)
         |                                             ^
   arch/m68k/include/asm/motorola_pgtable.h:116:34: note: in expansion of macro 'pmd_val'
     116 | #define pmd_present(pmd)        (pmd_val(pmd) & _PAGE_TABLE)
         |                                  ^~~~~~~
   mm/page_idle.c:74:36: note: in expansion of macro 'pmd_present'
      74 |                         if (likely(pmd_present(pmdp_get(pvmw.pmd))))
         |                                    ^~~~~~~~~~~


vim +20 arch/m68k/include/asm/page.h

138ff3462f53a7 Greg Ungerer   2010-09-07  14  
138ff3462f53a7 Greg Ungerer   2010-09-07  15  /*
138ff3462f53a7 Greg Ungerer   2010-09-07  16   * These are used to make use of C type-checking..
138ff3462f53a7 Greg Ungerer   2010-09-07  17   */
60e50f34b13e9e Mike Rapoport  2019-12-04  18  #if !defined(CONFIG_MMU) || CONFIG_PGTABLE_LEVELS == 3
ef22d8abd876e8 Peter Zijlstra 2020-01-31  19  typedef struct { unsigned long pmd; } pmd_t;
ef22d8abd876e8 Peter Zijlstra 2020-01-31 @20  #define pmd_val(x)	((&x)->pmd)
ef22d8abd876e8 Peter Zijlstra 2020-01-31  21  #define __pmd(x)	((pmd_t) { (x) } )
60e50f34b13e9e Mike Rapoport  2019-12-04  22  #endif
60e50f34b13e9e Mike Rapoport  2019-12-04  23  

:::::: The code at line 20 was first introduced by commit
:::::: ef22d8abd876e805b604e8f655127de2beee2869 m68k: mm: Restructure Motorola MMU page-table layout

:::::: TO: Peter Zijlstra [off-list ref]
:::::: CC: Geert Uytterhoeven [off-list ref]

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