[kkdwivedi:arena-lazy-pte 2/6] arch/m68k/include/asm/page.h:20:27: error: lvalue required as unary '&' operand

[kkdwivedi:arena-lazy-pte 2/6] arch/m68k/include/asm/page.h:20:27: error: lvalue required as unary '&' operand

[kernel test robot]

tree:   https://github.com/kkdwivedi/linux arena-lazy-pte
head:   ce19d941e895a85d7dc1e7d49e6b90b1262f7e79
commit: 0ec7dbb5a7536124b8723d262ad2f6e11244767d [2/6] mm: Add lockless kernel PMD populate, clear and range-flush helpers
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20261028/202610282023.2XwwglSs-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 16.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261028/202610282023.2XwwglSs-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610282023.2XwwglSs-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/m68k/include/asm/thread_info.h:6,
                    from include/linux/thread_info.h:62,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/m68k/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:107,
                    from arch/m68k/include/asm/irqflags.h:6,
                    from include/linux/irqflags.h:18,
                    from arch/m68k/include/asm/atomic.h:6,
                    from include/linux/atomic.h:7,
                    from include/linux/jump_label.h:243,
                    from include/linux/once.h:6,
                    from include/linux/prandom.h:12,
                    from kernel/sched/sched.h:8,
                    from kernel/sched/rq-offsets.c:5:
   include/linux/pgtable.h: In function 'pmdp_try_clear':
>> arch/m68k/include/asm/page.h:20:27: error: lvalue required as unary '&' operand
      20 | #define pmd_val(x)      ((&x)->pmd)
         |                           ^
   include/linux/pgtable.h:1119:13: note: in expansion of macro 'pmd_val'
    1119 |         if (pmd_val(pmdp_get(pmdp)) != pmd_val(old))
         |             ^~~~~~~
   make[3]: *** [scripts/Makefile.build:185: kernel/sched/rq-offsets.s] Error 1
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1436: prepare0] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


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 <peterz@infradead.org>
:::::: CC: Geert Uytterhoeven <geert@linux-m68k.org>

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