ftrace: Consistently restore trace function on sysctl enabling
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 Cc: stable@vger.kernel.org Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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@ -4555,12 +4555,8 @@ ftrace_enable_sysctl(struct ctl_table *table, int write,
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ftrace_startup_sysctl();
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/* we are starting ftrace again */
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if (ftrace_ops_list != &ftrace_list_end) {
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if (ftrace_ops_list->next == &ftrace_list_end)
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ftrace_trace_function = ftrace_ops_list->func;
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else
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ftrace_trace_function = ftrace_ops_list_func;
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}
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if (ftrace_ops_list != &ftrace_list_end)
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update_ftrace_function();
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} else {
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/* stopping ftrace calls (just send to ftrace_stub) */
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