tracing: Add SPDX License format tags to tracing files

Add the SPDX License header to ease license compliance management.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/ftrace.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Infrastructure for profiling code inserted by 'gcc -pg'.
  *

kernel/trace/ring_buffer.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generic ring buffer
  *

kernel/trace/ring_buffer_benchmark.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * ring buffer tester and benchmark
  *

kernel/trace/trace.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * ring buffer based function tracer
  *

kernel/trace/trace_clock.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * tracing clocks
  *

kernel/trace/trace_event_perf.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace event based perf event profiling/tracing
  *

kernel/trace/trace_events.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * event tracer
  *

kernel/trace/trace_events_filter.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace_events_filter - generic event filtering
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
  * Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
  */
 

kernel/trace/trace_events_hist.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace_events_hist - trace event hist triggers
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  * Copyright (C) 2015 Tom Zanussi <tom.zanussi@linux.intel.com>
  */
 

kernel/trace/trace_events_trigger.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace_events_trigger - trace event triggers
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
  * Copyright (C) 2013 Tom Zanussi <tom.zanussi@linux.intel.com>
  */
 

kernel/trace/trace_hwlat.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace_hwlatdetect.c - A simple Hardware Latency detector.
  *
@@ -35,9 +36,6 @@
  *
  * Includes useful feedback from Clark Williams <clark@redhat.com>
  *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 #include <linux/kthread.h>
 #include <linux/tracefs.h>

kernel/trace/trace_irqsoff.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace irqs off critical timings
  *

kernel/trace/trace_kprobe.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Kprobes-based tracing events
  *
  * Created by Masami Hiramatsu <mhiramat@redhat.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #define pr_fmt(fmt)	"trace_kprobe: " fmt
 

kernel/trace/trace_output.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace_output.c
  *

kernel/trace/trace_printk.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace binary printk
  *

kernel/trace/trace_probe.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Common code for probe-based Dynamic events.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * This code was copied from kernel/trace/trace_kprobe.c written by
  * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
  *

kernel/trace/trace_probe.h

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Common header file for probe-based Dynamic events.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * This code was copied from kernel/trace/trace_kprobe.h written by
  * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
  *

kernel/trace/trace_seq.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * trace_seq.c
  *

kernel/trace/trace_uprobe.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * uprobes-based tracing events
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
  * Copyright (C) IBM Corporation, 2010-2012
  * Author:	Srikar Dronamraju <srikar@linux.vnet.ibm.com>
  */

kernel/trace/tracing_map.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * tracing_map - lock-free map for tracing
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  * Copyright (C) 2015 Tom Zanussi <tom.zanussi@linux.intel.com>
  *
  * tracing_map implementation inspired by lock-free map algorithms