[anolis-intel-cloud:devel-5.10 11/11] drivers/base/cpu.c:209:16: warning: stack frame size (2328) exceeds limit (2048) in 'show_cpus_attr'

[anolis-intel-cloud:devel-5.10 11/11] drivers/base/cpu.c:209:16: warning: stack frame size (2328) exceeds limit (2048) in 'show_cpus_attr'

[kernel test robot]

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-5.10
head:   6bec8a39b9738b7a22c1f607634a05ba0986225a
commit: cd1308cd06a17efa58ea0136db5935ca1c8bcda5 [11/11] anolis: sysfs/cpu: Add online cpus support for bpf rich container
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250520/202505202010.5cbwb172-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
rustc: rustc 1.58.0 (02072b482 2022-01-11)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250520/202505202010.5cbwb172-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/202505202010.5cbwb172-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/base/cpu.c:209:16: warning: stack frame size (2328) exceeds limit (2048) in 'show_cpus_attr' [-Wframe-larger-than]
     209 | static ssize_t show_cpus_attr(struct device *dev,
         |                ^
   1 warning generated.


vim +/show_cpus_attr +209 drivers/base/cpu.c

265d2e2e31c5f6 Andi Kleen  2010-01-05  208  
8a25a2fd126c62 Kay Sievers 2011-12-21 @209  static ssize_t show_cpus_attr(struct device *dev,
8a25a2fd126c62 Kay Sievers 2011-12-21  210  			      struct device_attribute *attr,
265d2e2e31c5f6 Andi Kleen  2010-01-05  211  			      char *buf)
9d1fe3236a1d64 Mike Travis 2008-04-08  212  {
265d2e2e31c5f6 Andi Kleen  2010-01-05  213  	struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);
8f51f2f82f2edb Xunlei Pang 2020-11-23  214  	struct cpumask cpuset_allowed;
e5b00b47d48f2f Xunlei Pang 2021-06-15  215  	struct task_struct __maybe_unused *scenario;
8f51f2f82f2edb Xunlei Pang 2020-11-23  216  	bool rich_container;
cd1308cd06a17e Yi Tao      2023-08-21  217  	struct bpf_rich_container_info info = {0};
8f51f2f82f2edb Xunlei Pang 2020-11-23  218  
8f51f2f82f2edb Xunlei Pang 2020-11-23  219  	rcu_read_lock();
8f51f2f82f2edb Xunlei Pang 2020-11-23  220  	rich_container = in_rich_container(current);
8f51f2f82f2edb Xunlei Pang 2020-11-23  221  	rcu_read_unlock();
8f51f2f82f2edb Xunlei Pang 2020-11-23  222  
e5b00b47d48f2f Xunlei Pang 2021-06-15  223  	if (rich_container && !strcmp(attr->attr.name, "online")) {
e5b00b47d48f2f Xunlei Pang 2021-06-15  224  #ifdef CONFIG_RICH_CONTAINER_CG_SWITCH
aa278c4ae55977 Xunlei Pang 2021-06-15  225  		rich_container_get_cpuset_cpus(&cpuset_allowed);
e5b00b47d48f2f Xunlei Pang 2021-06-15  226  #else
e5b00b47d48f2f Xunlei Pang 2021-06-15  227  		read_lock(&tasklist_lock);
e5b00b47d48f2f Xunlei Pang 2021-06-15  228  		scenario = rich_container_get_scenario();
e5b00b47d48f2f Xunlei Pang 2021-06-15  229  		get_task_struct(scenario);
e5b00b47d48f2f Xunlei Pang 2021-06-15  230  		read_unlock(&tasklist_lock);
e5b00b47d48f2f Xunlei Pang 2021-06-15  231  
e5b00b47d48f2f Xunlei Pang 2021-06-15  232  		rich_container_get_cpus(scenario, &cpuset_allowed);
e5b00b47d48f2f Xunlei Pang 2021-06-15  233  
e5b00b47d48f2f Xunlei Pang 2021-06-15  234  		put_task_struct(scenario);
e5b00b47d48f2f Xunlei Pang 2021-06-15  235  #endif
e5b00b47d48f2f Xunlei Pang 2021-06-15  236  	}
8f51f2f82f2edb Xunlei Pang 2020-11-23  237  	else
8f51f2f82f2edb Xunlei Pang 2020-11-23  238  		cpumask_copy(&cpuset_allowed, ca->map);
8f51f2f82f2edb Xunlei Pang 2020-11-23  239  	
cd1308cd06a17e Yi Tao      2023-08-21  240  	if (!BPF_CGROUP_RUN_PROG_RICH_CONTAINER_CPU(&info, 1))
cd1308cd06a17e Yi Tao      2023-08-21  241  		cpumask_copy(&cpuset_allowed, &info.cpus_mask);
cd1308cd06a17e Yi Tao      2023-08-21  242  
8f51f2f82f2edb Xunlei Pang 2020-11-23  243  	return cpumap_print_to_pagebuf(true, buf, &cpuset_allowed);
9d1fe3236a1d64 Mike Travis 2008-04-08  244  }
9d1fe3236a1d64 Mike Travis 2008-04-08  245  

:::::: The code at line 209 was first introduced by commit
:::::: 8a25a2fd126c621f44f3aeaef80d51f00fc11639 cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem

:::::: TO: Kay Sievers <kay.sievers@vrfy.org>
:::::: CC: Greg Kroah-Hartman <gregkh@suse.de>

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