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-rw-r--r--fs/pstore/ftrace.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c
index d4887705bb61..899d0ba0bd6c 100644
--- a/fs/pstore/ftrace.c
+++ b/fs/pstore/ftrace.c
@@ -27,6 +27,9 @@
#include <asm/barrier.h>
#include "internal.h"
+/* This doesn't need to be atomic: speed is chosen over correctness here. */
+static u64 pstore_ftrace_stamp;
+
static void notrace pstore_ftrace_call(unsigned long ip,
unsigned long parent_ip,
struct ftrace_ops *op,
@@ -42,6 +45,7 @@ static void notrace pstore_ftrace_call(unsigned long ip,
rec.ip = ip;
rec.parent_ip = parent_ip;
+ pstore_ftrace_write_timestamp(&rec, pstore_ftrace_stamp++);
pstore_ftrace_encode_cpu(&rec, raw_smp_processor_id());
psinfo->write_buf(PSTORE_TYPE_FTRACE, 0, NULL, 0, (void *)&rec,
0, sizeof(rec), psinfo);
@@ -71,10 +75,13 @@ static ssize_t pstore_ftrace_knob_write(struct file *f, const char __user *buf,
if (!on ^ pstore_ftrace_enabled)
goto out;
- if (on)
+ if (on) {
+ ftrace_ops_set_global_filter(&pstore_ftrace_ops);
ret = register_ftrace_function(&pstore_ftrace_ops);
- else
+ } else {
ret = unregister_ftrace_function(&pstore_ftrace_ops);
+ }
+
if (ret) {
pr_err("%s: unable to %sregister ftrace ops: %zd\n",
__func__, on ? "" : "un", ret);