Re: [RFC PATCH v6 3/5] mm: Hot page tracking and promotion - pghot

[kernel test robot <lkp@intel.com>]

Hi Bharata,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on a989fde763f4f24209e4702f50a45be572340e68]

url:    https://github.com/intel-lab-lkp/linux/commits/Bharata-B-Rao/mm-migrate-Allow-misplaced-migration-without-VMA/20260325-092849
base:   a989fde763f4f24209e4702f50a45be572340e68
patch link:    https://lore.kernel.org/r/20260323095104.238982-4-bharata%40amd.com
patch subject: [RFC PATCH v6 3/5] mm: Hot page tracking and promotion - pghot
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20260327/202603270724.CtFSyk22-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260327/202603270724.CtFSyk22-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/202603270724.CtFSyk22-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from mm/pghot-default.c:10:
   mm/pghot-default.c: In function 'pghot_access_latency':
>> include/linux/pghot.h:56:41: error: implicit declaration of function 'GENMASK' [-Wimplicit-function-declaration]
      56 | #define PGHOT_TIME_MASK                 GENMASK(PGHOT_TIME_WIDTH - 1, 0)
         |                                         ^~~~~~~
   include/linux/pghot.h:57:42: note: in expansion of macro 'PGHOT_TIME_MASK'
      57 | #define PGHOT_TIME_BUCKETS_MASK         (PGHOT_TIME_MASK << PGHOT_TIME_BUCKETS_SHIFT)
         |                                          ^~~~~~~~~~~~~~~
   mm/pghot-default.c:24:17: note: in expansion of macro 'PGHOT_TIME_BUCKETS_MASK'
      24 |         time &= PGHOT_TIME_BUCKETS_MASK;
         |                 ^~~~~~~~~~~~~~~~~~~~~~~
   mm/pghot-default.c: In function 'pghot_update_record':
   mm/pghot-default.c:60:36: error: implicit declaration of function 'BIT' [-Wimplicit-function-declaration]
      60 |                         hotness |= BIT(PGHOT_MIGRATE_READY);
         |                                    ^~~
   In file included from include/linux/jump_label.h:77,
                    from include/linux/static_key.h:1,
                    from include/linux/pghot.h:13:
   mm/pghot-default.c:61:28: error: implicit declaration of function 'try_cmpxchg' [-Wimplicit-function-declaration]
      61 |         } while (unlikely(!try_cmpxchg(phi, &old_hotness, hotness)));
         |                            ^~~~~~~~~~~
   include/linux/compiler.h:77:45: note: in definition of macro 'unlikely'
      77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
         |                                             ^


vim +/GENMASK +56 include/linux/pghot.h

    54	
    55	#define PGHOT_FREQ_MASK			GENMASK(PGHOT_FREQ_WIDTH - 1, 0)
  > 56	#define PGHOT_TIME_MASK			GENMASK(PGHOT_TIME_WIDTH - 1, 0)
    57	#define PGHOT_TIME_BUCKETS_MASK		(PGHOT_TIME_MASK << PGHOT_TIME_BUCKETS_SHIFT)
    58	

-- 
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https://github.com/intel/lkp-tests/wiki