fs/proc/softirqs.c

   1 #include <linux/init.h>
   2 #include <linux/kernel_stat.h>
   3 #include <linux/proc_fs.h>
   4 #include <linux/seq_file.h>
   5
   6 /*
   7  * /proc/softirqs  ... display the number of softirqs
   8  */
   9 static int show_softirqs(struct seq_file *p, void *v)
  10 {
  11         int i, j;
  12
  13         seq_puts(p, "                    ");
  14         for_each_possible_cpu(i)
  15                 seq_printf(p, "CPU%-8d", i);
  16         seq_putc(p, '\n');
  17
  18         for (i = 0; i < NR_SOFTIRQS; i++) {
  19                 seq_printf(p, "%12s:", softirq_to_name[i]);
  20                 for_each_possible_cpu(j)
  21                         seq_printf(p, " %10u", kstat_softirqs_cpu(i, j));
  22                 seq_putc(p, '\n');
  23         }
  24         return 0;
  25 }
  26
  27 static int softirqs_open(struct inode *inode, struct file *file)
  28 {
  29         return single_open(file, show_softirqs, NULL);
  30 }
  31
  32 static const struct file_operations proc_softirqs_operations = {
  33         .open           = softirqs_open,
  34         .read           = seq_read,
  35         .llseek         = seq_lseek,
  36         .release        = single_release,
  37 };
  38
  39 static int __init proc_softirqs_init(void)
  40 {
  41         proc_create("softirqs", 0, NULL, &proc_softirqs_operations);
  42         return 0;
  43 }
  44 module_init(proc_softirqs_init);