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Diffstat (limited to 'fs/pstore/ftrace.c')
-rw-r--r--fs/pstore/ftrace.c25
1 files changed, 19 insertions, 6 deletions
diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c
index 76a4eeb92982..d4887705bb61 100644
--- a/fs/pstore/ftrace.c
+++ b/fs/pstore/ftrace.c
@@ -104,22 +104,23 @@ static const struct file_operations pstore_knob_fops = {
.write = pstore_ftrace_knob_write,
};
+static struct dentry *pstore_ftrace_dir;
+
void pstore_register_ftrace(void)
{
- struct dentry *dir;
struct dentry *file;
if (!psinfo->write_buf)
return;
- dir = debugfs_create_dir("pstore", NULL);
- if (!dir) {
+ pstore_ftrace_dir = debugfs_create_dir("pstore", NULL);
+ if (!pstore_ftrace_dir) {
pr_err("%s: unable to create pstore directory\n", __func__);
return;
}
- file = debugfs_create_file("record_ftrace", 0600, dir, NULL,
- &pstore_knob_fops);
+ file = debugfs_create_file("record_ftrace", 0600, pstore_ftrace_dir,
+ NULL, &pstore_knob_fops);
if (!file) {
pr_err("%s: unable to create record_ftrace file\n", __func__);
goto err_file;
@@ -127,5 +128,17 @@ void pstore_register_ftrace(void)
return;
err_file:
- debugfs_remove(dir);
+ debugfs_remove(pstore_ftrace_dir);
+}
+
+void pstore_unregister_ftrace(void)
+{
+ mutex_lock(&pstore_ftrace_lock);
+ if (pstore_ftrace_enabled) {
+ unregister_ftrace_function(&pstore_ftrace_ops);
+ pstore_ftrace_enabled = 0;
+ }
+ mutex_unlock(&pstore_ftrace_lock);
+
+ debugfs_remove_recursive(pstore_ftrace_dir);
}