arch/arm64/mm/ptdump_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/debugfs.h>
   3 #include <linux/seq_file.h>
   4
   5 #include <asm/ptdump.h>
   6
   7 static int ptdump_show(struct seq_file *m, void *v)
   8 {
   9         struct ptdump_info *info = m->private;
  10         ptdump_walk_pgd(m, info);
  11         return 0;
  12 }
  13
  14 static int ptdump_open(struct inode *inode, struct file *file)
  15 {
  16         return single_open(file, ptdump_show, inode->i_private);
  17 }
  18
  19 static const struct file_operations ptdump_fops = {
  20         .open           = ptdump_open,
  21         .read           = seq_read,
  22         .llseek         = seq_lseek,
  23         .release        = single_release,
  24 };
  25
  26 int ptdump_debugfs_register(struct ptdump_info *info, const char *name)
  27 {
  28         struct dentry *pe;
  29         pe = debugfs_create_file(name, 0400, NULL, info, &ptdump_fops);
  30         return pe ? 0 : -ENOMEM;
  31
  32 }