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authorJan Kiszka <jan.kiszka@siemens.com>2013-03-26 17:53:03 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-12 09:38:45 -0700
commitb81d3241838167667fc1ec9bb5670d5f661a3628 (patch)
tree625e62463a9e8bc060ea8a5b036d5c107bae16c2 /kernel
parentb26bcbe0a7bba3321cefa4c9936e05cb58df03cb (diff)
ftrace: Consistently restore trace function on sysctl enabling
commit 5000c418840b309251c5887f0b56503aae30f84c upstream. If we reenable ftrace via syctl, we currently set ftrace_trace_function based on the previous simplistic algorithm. This is inconsistent with what update_ftrace_function does. So better call that helper instead. Link: http://lkml.kernel.org/r/5151D26F.1070702@siemens.com Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/ftrace.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 62f3751816c8..e539dfaf65b9 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -4381,12 +4381,8 @@ ftrace_enable_sysctl(struct ctl_table *table, int write,
ftrace_startup_sysctl();
/* we are starting ftrace again */
- if (ftrace_ops_list != &ftrace_list_end) {
- if (ftrace_ops_list->next == &ftrace_list_end)
- ftrace_trace_function = ftrace_ops_list->func;
- else
- ftrace_trace_function = ftrace_ops_list_func;
- }
+ if (ftrace_ops_list != &ftrace_list_end)
+ update_ftrace_function();
} else {
/* stopping ftrace calls (just send to ftrace_stub) */