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authorSteven Rostedt <srostedt@redhat.com>2008-11-07 22:36:02 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-08 09:51:09 +0100
commit75f5c47da386445ba0c5a8b7e3ca0c906e763369 (patch)
treefa6719d849c7d3d8b1a7f753c877ac871035701e /kernel/trace/trace_sched_switch.c
parent0183fb1c94b74862b073590fc52c56b7364b7bad (diff)
ftrace: fix boot trace sched startup
Impact: boot tracer startup modified The boot tracer calls into some of the schedule tracing private functions that should not be exported. This patch cleans it up, and makes way for further changes in the ftrace infrastructure. This patch adds a api to assign a tracer array to the schedule context switch tracer. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_sched_switch.c')
-rw-r--r--kernel/trace/trace_sched_switch.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 91c699be8c8..fbf05df7134 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -152,6 +152,19 @@ void tracing_stop_cmdline_record(void)
tracing_stop_sched_switch();
}
+/**
+ * tracing_cmdline_assign_trace - assign a trace array for ctx switch
+ * @tr: trace array pointer to assign
+ *
+ * Some tracers might want to record the context switches in their
+ * trace. This function lets those tracers assign the trace array
+ * to use.
+ */
+void tracing_cmdline_assign_trace(struct trace_array *tr)
+{
+ ctx_trace = tr;
+}
+
static void start_sched_trace(struct trace_array *tr)
{
sched_switch_reset(tr);
@@ -197,7 +210,7 @@ static void sched_switch_trace_stop(struct trace_array *tr)
tracing_stop_sched_switch();
}
-struct tracer sched_switch_trace __read_mostly =
+static struct tracer sched_switch_trace __read_mostly =
{
.name = "sched_switch",
.init = sched_switch_trace_init,