[openeuler:OLK-6.6 3098/3098] kernel/bpf-rvi/common_kfuncs.c:179:27: warning: no previous prototype for 'bpf_mem_totalcma'

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

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   fe656d8bc10b5c4ced04a8821909e64adc18a7ef
commit: 9c449e4d9af5b69a1b9fdae9e3f18dc1515635b8 [3098/3098] bpf-rvi: Add bpf_mem_{total,free}cma kfunc
config: x86_64-randconfig-001-20251104 (https://download.01.org/0day-ci/archive/20251105/202511051322.XbdPyERX-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251105/202511051322.XbdPyERX-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/202511051322.XbdPyERX-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/bpf-rvi/common_kfuncs.c:26:32: warning: no previous prototype for 'bpf_mem_cgroup_from_task' [-Wmissing-prototypes]
      26 | __bpf_kfunc struct mem_cgroup *bpf_mem_cgroup_from_task(struct task_struct *p)
         |                                ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:35:35: warning: no previous prototype for 'bpf_task_active_pid_ns' [-Wmissing-prototypes]
      35 | __bpf_kfunc struct pid_namespace *bpf_task_active_pid_ns(struct task_struct *task)
         |                                   ^~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:40:17: warning: no previous prototype for 'bpf_pidns_nr_tasks' [-Wmissing-prototypes]
      40 | __bpf_kfunc u64 bpf_pidns_nr_tasks(struct pid_namespace *ns)
         |                 ^~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:54:17: warning: no previous prototype for 'bpf_pidns_last_pid' [-Wmissing-prototypes]
      54 | __bpf_kfunc u32 bpf_pidns_last_pid(struct pid_namespace *ns)
         |                 ^~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:83:18: warning: no previous prototype for 'bpf_si_memswinfo' [-Wmissing-prototypes]
      83 | __bpf_kfunc void bpf_si_memswinfo(struct bpf_sysinfo *bsi)
         |                  ^~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:93:27: warning: no previous prototype for 'bpf_page_counter_read' [-Wmissing-prototypes]
      93 | __bpf_kfunc unsigned long bpf_page_counter_read(struct page_counter *counter)
         |                           ^~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:103:18: warning: no previous prototype for 'bpf_seq_file_append' [-Wmissing-prototypes]
     103 | __bpf_kfunc void bpf_seq_file_append(struct seq_file *dst, struct seq_file *src)
         |                  ^~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:117:18: warning: no previous prototype for 'bpf_get_boottime_timens' [-Wmissing-prototypes]
     117 | __bpf_kfunc void bpf_get_boottime_timens(struct task_struct *tsk, struct timespec64 *boottime)
         |                  ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:123:27: warning: no previous prototype for 'bpf_get_total_forks' [-Wmissing-prototypes]
     123 | __bpf_kfunc unsigned long bpf_get_total_forks(void)
         |                           ^~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:128:26: warning: no previous prototype for 'bpf_nr_running' [-Wmissing-prototypes]
     128 | __bpf_kfunc unsigned int bpf_nr_running(void)
         |                          ^~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:133:32: warning: no previous prototype for 'bpf_nr_context_switches' [-Wmissing-prototypes]
     133 | __bpf_kfunc unsigned long long bpf_nr_context_switches(void)
         |                                ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:138:26: warning: no previous prototype for 'bpf_nr_iowait' [-Wmissing-prototypes]
     138 | __bpf_kfunc unsigned int bpf_nr_iowait(void)
         |                          ^~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:144:26: warning: no previous prototype for 'bpf_kstat_softirqs_cpu' [-Wmissing-prototypes]
     144 | __bpf_kfunc unsigned int bpf_kstat_softirqs_cpu(unsigned int irq, int cpu)
         |                          ^~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:149:27: warning: no previous prototype for 'bpf_kstat_cpu_irqs_sum' [-Wmissing-prototypes]
     149 | __bpf_kfunc unsigned long bpf_kstat_cpu_irqs_sum(unsigned int cpu)
         |                           ^~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:154:18: warning: no previous prototype for 'bpf_kcpustat_cpu_fetch' [-Wmissing-prototypes]
     154 | __bpf_kfunc void bpf_kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
         |                  ^~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:163:27: warning: no previous prototype for 'bpf_mem_file_hugepage' [-Wmissing-prototypes]
     163 | __bpf_kfunc unsigned long bpf_mem_file_hugepage(void)
         |                           ^~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:168:27: warning: no previous prototype for 'bpf_mem_file_pmdmapped' [-Wmissing-prototypes]
     168 | __bpf_kfunc unsigned long bpf_mem_file_pmdmapped(void)
         |                           ^~~~~~~~~~~~~~~~~~~~~~
   kernel/bpf-rvi/common_kfuncs.c:173:27: warning: no previous prototype for 'bpf_mem_kreclaimable' [-Wmissing-prototypes]
     173 | __bpf_kfunc unsigned long bpf_mem_kreclaimable(void)
         |                           ^~~~~~~~~~~~~~~~~~~~
>> kernel/bpf-rvi/common_kfuncs.c:179:27: warning: no previous prototype for 'bpf_mem_totalcma' [-Wmissing-prototypes]
     179 | __bpf_kfunc unsigned long bpf_mem_totalcma(void)
         |                           ^~~~~~~~~~~~~~~~
>> kernel/bpf-rvi/common_kfuncs.c:184:27: warning: no previous prototype for 'bpf_mem_freecma' [-Wmissing-prototypes]
     184 | __bpf_kfunc unsigned long bpf_mem_freecma(void)
         |                           ^~~~~~~~~~~~~~~


vim +/bpf_mem_totalcma +179 kernel/bpf-rvi/common_kfuncs.c

   178	
 > 179	__bpf_kfunc unsigned long bpf_mem_totalcma(void)
   180	{
   181		return totalcma_pages;
   182	}
   183	
 > 184	__bpf_kfunc unsigned long bpf_mem_freecma(void)
   185	{
   186		return global_zone_page_state(NR_FREE_CMA_PAGES);
   187	}
   188	

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