add led

hc

2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/samples/trace_events/trace-events-sample.c
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..
@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 #include <linux/module.h>
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 #include <linux/kthread.h>
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