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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2009-03-25 16:27:17 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-25 18:32:34 +0100 |
| commit | e6f489013b985b58d096a3091ece0ed579367232 (patch) | |
| tree | 598baf56ceb47c256338ae4934937d2e6e111181 | |
| parent | ee000b7f9fe429d2470c674ccec8d344f6789e0d (diff) | |
| download | linux-rt-e6f489013b985b58d096a3091ece0ed579367232.tar.gz | |
trace_stat: don't call seq_printf() in seq_operation->start()
Impact: Fix incorrect way using seq_file's API
Use SEQ_START_TOKEN instead of calling ->stat_headers()
int seq_operation->start().
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Steven Rostedt <srostedt@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
LKML-Reference: <49C9EAE5.5070202@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/trace/trace_stat.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/trace/trace_stat.c b/kernel/trace/trace_stat.c index f71b85b22cfe..8c129dd480ad 100644 --- a/kernel/trace/trace_stat.c +++ b/kernel/trace/trace_stat.c @@ -163,7 +163,7 @@ static void *stat_seq_start(struct seq_file *s, loff_t *pos) /* If we are in the beginning of the file, print the headers */ if (!*pos && session->ts->stat_headers) - session->ts->stat_headers(s); + return SEQ_START_TOKEN; return seq_list_start(&session->stat_list, *pos); } @@ -172,6 +172,9 @@ static void *stat_seq_next(struct seq_file *s, void *p, loff_t *pos) { struct tracer_stat_session *session = s->private; + if (p == SEQ_START_TOKEN) + return seq_list_start(&session->stat_list, *pos); + return seq_list_next(p, &session->stat_list, pos); } @@ -186,6 +189,9 @@ static int stat_seq_show(struct seq_file *s, void *v) struct tracer_stat_session *session = s->private; struct trace_stat_list *l = list_entry(v, struct trace_stat_list, list); + if (v == SEQ_START_TOKEN) + return session->ts->stat_headers(s); + return session->ts->stat_show(s, l->stat); } |