ftrace: support for PowerPC
This patch adds full support for ftrace for PowerPC (both 64 and 32 bit).
This includes dynamic tracing and function filtering.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index a5f6001..3877dd9 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -123,6 +123,7 @@
int ret;
int save_ftrace_enabled = ftrace_enabled;
int save_tracer_enabled = tracer_enabled;
+ char *func_name;
/* The ftrace test PASSED */
printk(KERN_CONT "PASSED\n");
@@ -142,9 +143,15 @@
return ret;
}
+ /*
+ * Some archs *cough*PowerPC*cough* add charachters to the
+ * start of the function names. We simply put a '*' to
+ * accomodate them.
+ */
+ func_name = "*" STR(DYN_FTRACE_TEST_NAME);
+
/* filter only on our function */
- ftrace_set_filter(STR(DYN_FTRACE_TEST_NAME),
- sizeof(STR(DYN_FTRACE_TEST_NAME)), 1);
+ ftrace_set_filter(func_name, strlen(func_name), 1);
/* enable tracing */
tr->ctrl = 1;
