Re: [PATCH -next 2/2] memcg: remove mem_cgroup_size()

[Chen Ridong]

On 2025/12/10 9:35, kernel test robot wrote:
> Hi Chen,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on next-20251209]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Chen-Ridong/memcg-move-mem_cgroup_usage-memcontrol-v1-c/20251209-211854
> base:   next-20251209
> patch link:    https://lore.kernel.org/r/20251209130251.1988615-3-chenridong%40huaweicloud.com
> patch subject: [PATCH -next 2/2] memcg: remove mem_cgroup_size()
> config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20251210/202512100924.LqJqXM7P-lkp@xxxxxxxxx/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/20251210/202512100924.LqJqXM7P-lkp@xxxxxxxxx/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@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202512100924.LqJqXM7P-lkp@xxxxxxxxx/
> 
> All errors (new ones prefixed by >>):
> 
>    mm/vmscan.c: In function 'apply_proportional_protection':
>>> mm/vmscan.c:2488:63: error: invalid use of undefined type 'struct mem_cgroup'
>     2488 |                 unsigned long usage = page_counter_read(&memcg->memory);
>          |                                                               ^~
> 
> 
> vim +2488 mm/vmscan.c
> 

Oh, I missed CONFIG_MEMCG=n case, will fix it, thanks.

-- 
Best regards,
Ridong