1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/cpufreq.h> 3 #include <linux/fs.h> 4 #include <linux/init.h> 5 #include <linux/proc_fs.h> 6 #include <linux/seq_file.h> 7 8 extern const struct seq_operations cpuinfo_op; 9 10 static int cpuinfo_open(struct inode *inode, struct file *file) 11 { 12 return seq_open(file, &cpuinfo_op); 13 } 14 15 static const struct proc_ops cpuinfo_proc_ops = { 16 .proc_flags = PROC_ENTRY_PERMANENT, 17 .proc_open = cpuinfo_open, 18 .proc_read_iter = seq_read_iter, 19 .proc_lseek = seq_lseek, 20 .proc_release = seq_release, 21 }; 22 23 static int __init proc_cpuinfo_init(void) 24 { 25 proc_create("cpuinfo", 0, NULL, &cpuinfo_proc_ops); 26 return 0; 27 } 28 fs_initcall(proc_cpuinfo_init); 29