arch/arm64/mm/ptdump_debugfs.c

   1 #include <linux/debugfs.h>
   2 #include <linux/seq_file.h>
   3
   4 #include <asm/ptdump.h>
   5
   6 static int ptdump_show(struct seq_file *m, void *v)
   7 {
   8         struct ptdump_info *info = m->private;
   9         ptdump_walk_pgd(m, info);
  10         return 0;
  11 }
  12
  13 static int ptdump_open(struct inode *inode, struct file *file)
  14 {
  15         return single_open(file, ptdump_show, inode->i_private);
  16 }
  17
  18 static const struct file_operations ptdump_fops = {
  19         .open           = ptdump_open,
  20         .read           = seq_read,
  21         .llseek         = seq_lseek,
  22         .release        = single_release,
  23 };
  24
  25 int ptdump_debugfs_register(struct ptdump_info *info, const char *name)
  26 {
  27         struct dentry *pe;
  28         pe = debugfs_create_file(name, 0400, NULL, info, &ptdump_fops);
  29         return pe ? 0 : -ENOMEM;
  30
  31 }