From 1d4db00a5e30c7b8f8dc2a1b19e886fd942be143 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Mon, 12 May 2008 21:20:45 +0200
Subject: [PATCH] ftrace: reset selftests
The tests may leave stuff in the buffers. This resets the buffers
after each test is run. If a test fails, it does not reset the
buffer to avoid touching a buffer that is corrupted.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/trace/trace.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8755a4370484..6580e7ed04be 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -289,6 +289,13 @@ int register_tracer(struct tracer *type)
printk(KERN_CONT "FAILED!\n");
goto out;
}
+ /* Only reset on passing, to avoid touching corrupted buffers */
+ for_each_possible_cpu(i) {
+ data = tr->data[i];
+ if (!head_page(data))
+ continue;
+ tracing_reset(data);
+ }
printk(KERN_CONT "PASSED\n");
}
#endif
--
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