fs/proc/softirqs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/init.h>
   3 #include <linux/kernel_stat.h>
   4 #include <linux/proc_fs.h>
   5 #include <linux/seq_file.h>
   6 #include "internal.h"
   7
   8 /*
   9  * /proc/softirqs  ... display the number of softirqs
  10  */
  11 static int show_softirqs(struct seq_file *p, void *v)
  12 {
  13         int i, j;
  14
  15         seq_puts(p, "                    ");
  16         for_each_possible_cpu(i)
  17                 seq_printf(p, "CPU%-8d", i);
  18         seq_putc(p, '\n');
  19
  20         for (i = 0; i < NR_SOFTIRQS; i++) {
  21                 seq_printf(p, "%12s:", softirq_to_name[i]);
  22                 for_each_possible_cpu(j)
  23                         seq_put_decimal_ull_width(p, " ", kstat_softirqs_cpu(i, j), 10);
  24                 seq_putc(p, '\n');
  25         }
  26         return 0;
  27 }
  28
  29 static int __init proc_softirqs_init(void)
  30 {
  31         struct proc_dir_entry *pde;
  32
  33         pde = proc_create_single("softirqs", 0, NULL, show_softirqs);
  34         pde_make_permanent(pde);
  35         return 0;
  36 }
  37 fs_initcall(proc_softirqs_init);