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Subject[bigeasy-staging:memcg 5/5] mm/memcontrol.c:2133:2: warning: #warning Optimisation in place
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git memcg
head: 47e47279015085e921d201c2d7f46f138c55d6f0
commit: 47e47279015085e921d201c2d7f46f138c55d6f0 [5/5] memcg: Kind of micro benchmark.
config: m68k-randconfig-r014-20220105 (https://download.01.org/0day-ci/archive/20220106/202201060957.kIjdfilS-lkp@intel.com/config)
compiler: m68k-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://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git/commit/?id=47e47279015085e921d201c2d7f46f138c55d6f0
git remote add bigeasy-staging https://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git
git fetch --no-tags bigeasy-staging memcg
git checkout 47e47279015085e921d201c2d7f46f138c55d6f0
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash

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 >>):

>> mm/memcontrol.c:2133:2: warning: #warning Optimisation in place [-Wcpp]
2133 | #warning Optimisation in place
| ^~~~~~~


vim +2133 mm/memcontrol.c

2126
2127 struct memcg_stock_pcp {
2128 /* Protects memcg_stock_pcp */
2129 local_lock_t stock_lock;
2130 struct mem_cgroup *cached; /* this never be root cgroup */
2131 unsigned int nr_pages;
2132 #ifndef DO_NO_OPTIMISATION
> 2133 #warning Optimisation in place
2134 /* Protects only task_obj */
2135 local_lock_t task_obj_lock;
2136 struct obj_stock task_obj;
2137 #endif
2138 struct obj_stock irq_obj;
2139
2140 struct work_struct work;
2141 unsigned long flags;
2142 #define FLUSHING_CACHED_CHARGE 0
2143 };
2144 static DEFINE_PER_CPU(struct memcg_stock_pcp, memcg_stock) = {
2145 .stock_lock = INIT_LOCAL_LOCK(stock_lock),
2146 #ifndef DO_NO_OPTIMISATION
2147 .task_obj_lock = INIT_LOCAL_LOCK(task_obj_lock),
2148 #endif
2149 };
2150 static DEFINE_MUTEX(percpu_charge_mutex);
2151

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

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