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Linux/arch/arm64/mm/ptdump_debugfs.c

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  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 }
 33 

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