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tracing: Fix set_ftrace_filter probe function display 

If one or more function probes (like traceon) are enabled,
and there's no other function filter, the first probe
func is skipped (which one depends on the position in the hash).

$ echo sys_open:traceon sys_close:traceon > ./set_ftrace_filter
$ cat set_ftrace_filter
#### all functions enabled ####
sys_close:traceon:unlimited
$

The reason was, that in the case of no other function filter,
the func_pos was not properly updated before calling t_hash_start.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <1297874134-7008-1-git-send-email-jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jiri Olsa 2011-02-16 17:35:34 +01:00 committed by Steven Rostedt
parent 8df341cf25
commit 1106b6997d
1 changed files with 1 additions and 2 deletions
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3
kernel/trace/ftrace.c
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@ -1467,7 +1467,7 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
return t_hash_next(m, pos);
(*pos)++;
iter->pos = *pos;
iter->pos = iter->func_pos = *pos;
if (iter->flags & FTRACE_ITER_PRINTALL)
return t_hash_start(m, pos);
@ -1502,7 +1502,6 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
if (!rec)
return t_hash_start(m, pos);
iter->func_pos = *pos;
iter->func = rec;
return iter;