Re: [PATCH] net: set proper memcg for net_init hooks allocations

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Hi Vasily,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.18-rc3 next-20220422]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Vasily-Averin/net-set-proper-memcg-for-net_init-hooks-allocations/20220423-160759
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git c00c5e1d157bec0ef0b0b59aa5482eb8dc7e8e49
config: mips-buildonly-randconfig-r006-20220423 (https://download.01.org/0day-ci/archive/20220423/202204231724.0eEAtmxV-lkp@xxxxxxxxx/config)
compiler: mips64-linux-gcc (GCC) 11.2.0
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/intel-lab-lkp/linux/commit/3b379e5391e36e13b9f36305aa6d233fb03d4e58
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Vasily-Averin/net-set-proper-memcg-for-net_init-hooks-allocations/20220423-160759
        git checkout 3b379e5391e36e13b9f36305aa6d233fb03d4e58
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=mips prepare

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

All errors (new ones prefixed by >>):

   In file included from include/linux/swap.h:9,
                    from include/linux/suspend.h:5,
                    from arch/mips/kernel/asm-offsets.c:17:
   include/linux/memcontrol.h: In function 'get_mem_cgroup_from_kmem':
>> include/linux/memcontrol.h:1773:28: error: implicit declaration of function 'css_tryget'; did you mean 'wb_tryget'? [-Werror=implicit-function-declaration]
    1773 |         } while (memcg && !css_tryget(&memcg->css));
         |                            ^~~~~~~~~~
         |                            wb_tryget
>> include/linux/memcontrol.h:1773:45: error: invalid use of undefined type 'struct mem_cgroup'
    1773 |         } while (memcg && !css_tryget(&memcg->css));
         |                                             ^~
   arch/mips/kernel/asm-offsets.c: At top level:
   arch/mips/kernel/asm-offsets.c:26:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes]
      26 | void output_ptreg_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:78:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes]
      78 | void output_task_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:92:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes]
      92 | void output_thread_info_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:108:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes]
     108 | void output_thread_defines(void)
         |      ^~~~~~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:179:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes]
     179 | void output_mm_defines(void)
         |      ^~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:240:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes]
     240 | void output_sc_defines(void)
         |      ^~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:253:6: warning: no previous prototype for 'output_signal_defined' [-Wmissing-prototypes]
     253 | void output_signal_defined(void)
         |      ^~~~~~~~~~~~~~~~~~~~~
   arch/mips/kernel/asm-offsets.c:332:6: warning: no previous prototype for 'output_pm_defines' [-Wmissing-prototypes]
     332 | void output_pm_defines(void)
         |      ^~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
   make[2]: *** [scripts/Makefile.build:120: arch/mips/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1194: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:219: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +1773 include/linux/memcontrol.h

  1765	
  1766	static inline struct mem_cgroup *get_mem_cgroup_from_kmem(void *p)
  1767	{
  1768		struct mem_cgroup *memcg;
  1769	
  1770		rcu_read_lock();
  1771		do {
  1772			memcg = mem_cgroup_from_obj(p);
> 1773		} while (memcg && !css_tryget(&memcg->css));

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



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