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-rw-r--r--kernel/trace/trace_stat.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/trace/trace_stat.c b/kernel/trace/trace_stat.c
index 07c60b09258f..a4bb239eb987 100644
--- a/kernel/trace/trace_stat.c
+++ b/kernel/trace/trace_stat.c
@@ -203,17 +203,21 @@ static void *stat_seq_start(struct seq_file *s, loff_t *pos)
203{ 203{
204 struct stat_session *session = s->private; 204 struct stat_session *session = s->private;
205 struct rb_node *node; 205 struct rb_node *node;
206 int n = *pos;
206 int i; 207 int i;
207 208
208 /* Prevent from tracer switch or rbtree modification */ 209 /* Prevent from tracer switch or rbtree modification */
209 mutex_lock(&session->stat_mutex); 210 mutex_lock(&session->stat_mutex);
210 211
211 /* If we are in the beginning of the file, print the headers */ 212 /* If we are in the beginning of the file, print the headers */
212 if (!*pos && session->ts->stat_headers) 213 if (session->ts->stat_headers) {
213 return SEQ_START_TOKEN; 214 if (n == 0)
215 return SEQ_START_TOKEN;
216 n--;
217 }
214 218
215 node = rb_first(&session->stat_root); 219 node = rb_first(&session->stat_root);
216 for (i = 0; node && i < *pos; i++) 220 for (i = 0; node && i < n; i++)
217 node = rb_next(node); 221 node = rb_next(node);
218 222
219 return node; 223 return node;