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-rw-r--r--fs/proc/cpuinfo.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/fs/proc/cpuinfo.c b/fs/proc/cpuinfo.c
new file mode 100644
index 000000000..419760fd7
--- /dev/null
+++ b/fs/proc/cpuinfo.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/cpufreq.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+__weak void arch_freq_prepare_all(void)
+{
+}
+
+extern const struct seq_operations cpuinfo_op;
+static int cpuinfo_open(struct inode *inode, struct file *file)
+{
+ arch_freq_prepare_all();
+ return seq_open(file, &cpuinfo_op);
+}
+
+static const struct proc_ops cpuinfo_proc_ops = {
+ .proc_flags = PROC_ENTRY_PERMANENT,
+ .proc_open = cpuinfo_open,
+ .proc_read_iter = seq_read_iter,
+ .proc_lseek = seq_lseek,
+ .proc_release = seq_release,
+};
+
+static int __init proc_cpuinfo_init(void)
+{
+ proc_create("cpuinfo", 0, NULL, &cpuinfo_proc_ops);
+ return 0;
+}
+fs_initcall(proc_cpuinfo_init);