// SPDX-License-Identifier: GPL-2.0

  #include <linux/init.h>
  #include <linux/kernel_stat.h>
  #include <linux/proc_fs.h>
  #include <linux/seq_file.h>
  
  /*
   * /proc/softirqs  ... display the number of softirqs
   */
  static int show_softirqs(struct seq_file *p, void *v)
  {
  	int i, j;

  	seq_puts(p, "                    ");

  	for_each_possible_cpu(i)
  		seq_printf(p, "CPU%-8d", i);

  	seq_putc(p, '
  ');

  
  	for (i = 0; i < NR_SOFTIRQS; i++) {

  		seq_printf(p, "%12s:", softirq_to_name[i]);

  		for_each_possible_cpu(j)
  			seq_printf(p, " %10u", kstat_softirqs_cpu(i, j));

  		seq_putc(p, '
  ');

  	}
  	return 0;
  }

  static int __init proc_softirqs_init(void)
  {

  	proc_create_single("softirqs", 0, NULL, show_softirqs);

  	return 0;
  }

  fs_initcall(proc_softirqs_init);