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 } 32