kernel/trace/trace_hwlat.c:479:2: warning: %d in format string (no. 1) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]

kernel/trace/trace_hwlat.c:479:2: warning: %d in format string (no. 1) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Daniel Bristot de Oliveira <bristot@redhat.com>
CC: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   251a1524293d0a90c4d5060f65f42a3016280049
commit: f46b16520a087e892a189db9c23ccf7e9bb5fa69 trace/hwlat: Implement the per-cpu mode
date:   6 weeks ago
:::::: branch date: 13 hours ago
:::::: commit date: 6 weeks ago
compiler: mips64-linux-gcc (GCC) 10.3.0

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


cppcheck warnings: (new ones prefixed by >>)
>> kernel/trace/trace_hwlat.c:479:2: warning: %d in format string (no. 1) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]
    snprintf(comm, 24, "hwlatd/%d", cpu);
    ^

vim +479 kernel/trace/trace_hwlat.c

f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  470  
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  471  /*
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  472   * start_cpu_kthread - Start a hwlat cpu kthread
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  473   */
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  474  static int start_cpu_kthread(unsigned int cpu)
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  475  {
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  476  	struct task_struct *kthread;
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  477  	char comm[24];
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  478  
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22 @479  	snprintf(comm, 24, "hwlatd/%d", cpu);
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  480  
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  481  	kthread = kthread_create_on_cpu(kthread_fn, NULL, cpu, comm);
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  482  	if (IS_ERR(kthread)) {
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  483  		pr_err(BANNER "could not start sampling thread\n");
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  484  		return -ENOMEM;
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  485  	}
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  486  
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  487  	per_cpu(hwlat_per_cpu_data, cpu).kthread = kthread;
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  488  	wake_up_process(kthread);
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  489  
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  490  	return 0;
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  491  }
f46b16520a087e Daniel Bristot de Oliveira 2021-06-22  492  

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