arch/x86/mm/pat/set_memory.c:90:6: warning: no previous prototype for 'update_split_page_event_count'

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

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tree:   https://github.com/0day-ci/linux/commits/UPDATE-20210128-161902/Steven-Rostedt/sched-tracing-Reset-critical-timings-on-scheduling/20210128-125618
head:   18d35c61d918430472f61aaa3bcca10c30c2ce70
commit: 18d35c61d918430472f61aaa3bcca10c30c2ce70 x86/mm: Tracking linear mapping split events
date:   2 hours ago
config: i386-randconfig-m021-20210128 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/18d35c61d918430472f61aaa3bcca10c30c2ce70
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review UPDATE-20210128-161902/Steven-Rostedt/sched-tracing-Reset-critical-timings-on-scheduling/20210128-125618
        git checkout 18d35c61d918430472f61aaa3bcca10c30c2ce70
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/mm/pat/set_memory.c:90:6: warning: no previous prototype for 'update_split_page_event_count' [-Wmissing-prototypes]
      90 | void update_split_page_event_count(int level)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/x86/mm/pat/set_memory.c: In function 'update_split_page_event_count':
   arch/x86/mm/pat/set_memory.c:97:19: error: 'DIRECT_MAP_4M_SPLIT' undeclared (first use in this function)
      97 |    count_vm_event(DIRECT_MAP_4M_SPLIT);
         |                   ^~~~~~~~~~~~~~~~~~~
   arch/x86/mm/pat/set_memory.c:97:19: note: each undeclared identifier is reported only once for each function it appears in
   arch/x86/mm/pat/set_memory.c:100:19: error: 'DIRECT_MAP_1G_SPLIT' undeclared (first use in this function)
     100 |    count_vm_event(DIRECT_MAP_1G_SPLIT);
         |                   ^~~~~~~~~~~~~~~~~~~


vim +/update_split_page_event_count +90 arch/x86/mm/pat/set_memory.c

    89	
  > 90	void update_split_page_event_count(int level)
    91	{
    92		if (system_state == SYSTEM_RUNNING) {
    93			if (level == PG_LEVEL_2M) {
    94	#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
    95				count_vm_event(DIRECT_MAP_2M_SPLIT);
    96	#else
    97				count_vm_event(DIRECT_MAP_4M_SPLIT);
    98	#endif
    99			} else if (level == PG_LEVEL_1G) {
   100				count_vm_event(DIRECT_MAP_1G_SPLIT);
   101			}
   102		}
   103	}
   104	

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

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