[ammarfaizi2-block:tj/cgroup/for-next 7/8] kernel/cgroup/cgroup.c:1310:39: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared

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

tree:   https://github.com/ammarfaizi2/linux-block tj/cgroup/for-next
head:   c87b1452249c69cdec70d5de64ea81f56e1ba3f8
commit: 79276d9e0dda30071b9a98045a3efa7e0a76938b [7/8] cgroup: Make !percpu threadgroup_rwsem operations optional
config: arm64-buildonly-randconfig-r001-20220721 (https://download.01.org/0day-ci/archive/20220723/202207231547.F1PGIJ5n-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/ammarfaizi2/linux-block/commit/79276d9e0dda30071b9a98045a3efa7e0a76938b
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block tj/cgroup/for-next
        git checkout 79276d9e0dda30071b9a98045a3efa7e0a76938b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash kernel/cgroup/

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

All error/warnings (new ones prefixed by >>):

>> kernel/cgroup/cgroup.c:1308:6: warning: no previous prototype for 'cgroup_favor_dynmods' [-Wmissing-prototypes]
    1308 | void cgroup_favor_dynmods(struct cgroup_root *root, bool favor)
         |      ^~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup.c: In function 'cgroup_favor_dynmods':
>> kernel/cgroup/cgroup.c:1310:39: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
    1310 |         bool favoring = root->flags & CGRP_ROOT_FAVOR_DYNMODS;
         |                                       ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup.c:1310:39: note: each undeclared identifier is reported only once for each function it appears in
   kernel/cgroup/cgroup.c: In function 'cgroup2_parse_param':
   kernel/cgroup/cgroup.c:1912:31: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
    1912 |                 ctx->flags |= CGRP_ROOT_FAVOR_DYNMODS;
         |                               ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup.c: In function 'apply_cgroup_root_flags':
   kernel/cgroup/cgroup.c:1942:51: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
    1942 |                                      root_flags & CGRP_ROOT_FAVOR_DYNMODS);
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup.c: In function 'cgroup_show_options':
   kernel/cgroup/cgroup.c:1960:35: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
    1960 |         if (cgrp_dfl_root.flags & CGRP_ROOT_FAVOR_DYNMODS)
         |                                   ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup.c: In function 'init_cgroup_root':
   kernel/cgroup/cgroup.c:2013:37: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
    2013 |         root->flags = ctx->flags & ~CGRP_ROOT_FAVOR_DYNMODS;
         |                                     ^~~~~~~~~~~~~~~~~~~~~~~
--
   kernel/cgroup/cgroup-v1.c: In function 'cgroup1_show_options':
>> kernel/cgroup/cgroup-v1.c:878:27: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
     878 |         if (root->flags & CGRP_ROOT_FAVOR_DYNMODS)
         |                           ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup-v1.c:878:27: note: each undeclared identifier is reported only once for each function it appears in
   kernel/cgroup/cgroup-v1.c: In function 'cgroup1_parse_param':
   kernel/cgroup/cgroup-v1.c:970:31: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
     970 |                 ctx->flags |= CGRP_ROOT_FAVOR_DYNMODS;
         |                               ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup-v1.c: In function 'cgroup1_root_to_use':
>> kernel/cgroup/cgroup-v1.c:1227:17: error: implicit declaration of function 'cgroup_favor_dynmods' [-Werror=implicit-function-declaration]
    1227 |                 cgroup_favor_dynmods(root, ctx->flags & CGRP_ROOT_FAVOR_DYNMODS);
         |                 ^~~~~~~~~~~~~~~~~~~~
   kernel/cgroup/cgroup-v1.c:1227:57: error: 'CGRP_ROOT_FAVOR_DYNMODS' undeclared (first use in this function)
    1227 |                 cgroup_favor_dynmods(root, ctx->flags & CGRP_ROOT_FAVOR_DYNMODS);
         |                                                         ^~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/CGRP_ROOT_FAVOR_DYNMODS +1310 kernel/cgroup/cgroup.c

  1307	
> 1308	void cgroup_favor_dynmods(struct cgroup_root *root, bool favor)
  1309	{
> 1310		bool favoring = root->flags & CGRP_ROOT_FAVOR_DYNMODS;
  1311	
  1312		/* see the comment above CGRP_ROOT_FAVOR_DYNMODS definition */
  1313		if (favor && !favoring) {
  1314			rcu_sync_enter(&cgroup_threadgroup_rwsem.rss);
  1315			root->flags |= CGRP_ROOT_FAVOR_DYNMODS;
  1316		} else if (!favor && favoring) {
  1317			rcu_sync_exit(&cgroup_threadgroup_rwsem.rss);
  1318			root->flags &= ~CGRP_ROOT_FAVOR_DYNMODS;
  1319		}
  1320	}
  1321	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp