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-rw-r--r--kernel/trace/trace_stat.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/kernel/trace/trace_stat.c b/kernel/trace/trace_stat.c
index 39310e3434e..f71b85b22cf 100644
--- a/kernel/trace/trace_stat.c
+++ b/kernel/trace/trace_stat.c
@@ -75,7 +75,7 @@ static int stat_seq_init(struct tracer_stat_session *session)
{
struct trace_stat_list *iter_entry, *new_entry;
struct tracer_stat *ts = session->ts;
- void *prev_stat;
+ void *stat;
int ret = 0;
int i;
@@ -85,6 +85,10 @@ static int stat_seq_init(struct tracer_stat_session *session)
if (!ts->stat_cmp)
ts->stat_cmp = dummy_cmp;
+ stat = ts->stat_start();
+ if (!stat)
+ goto exit;
+
/*
* The first entry. Actually this is the second, but the first
* one (the stat_list head) is pointless.
@@ -99,14 +103,19 @@ static int stat_seq_init(struct tracer_stat_session *session)
list_add(&new_entry->list, &session->stat_list);
- new_entry->stat = ts->stat_start();
- prev_stat = new_entry->stat;
+ new_entry->stat = stat;
/*
* Iterate over the tracer stat entries and store them in a sorted
* list.
*/
for (i = 1; ; i++) {
+ stat = ts->stat_next(stat, i);
+
+ /* End of insertion */
+ if (!stat)
+ break;
+
new_entry = kmalloc(sizeof(struct trace_stat_list), GFP_KERNEL);
if (!new_entry) {
ret = -ENOMEM;
@@ -114,11 +123,7 @@ static int stat_seq_init(struct tracer_stat_session *session)
}
INIT_LIST_HEAD(&new_entry->list);
- new_entry->stat = ts->stat_next(prev_stat, i);
-
- /* End of insertion */
- if (!new_entry->stat)
- break;
+ new_entry->stat = stat;
list_for_each_entry(iter_entry, &session->stat_list, list) {
@@ -137,8 +142,6 @@ static int stat_seq_init(struct tracer_stat_session *session)
break;
}
}
-
- prev_stat = new_entry->stat;
}
exit:
mutex_unlock(&session->stat_mutex);