time: Add SPDX license identifiers

Update the time(r) core files files with the correct SPDX license
identifier based on the license text in the file itself. The SPDX
identifier is a legally binding shorthand, which can be used instead of the
full boiler plate text.

This work is based on a script and data from Philippe Ombredanne, Kate
Stewart and myself. The data has been created with two independent license
scanners and manual inspection.

The following files do not contain any direct license information and have
been omitted from the big initial SPDX changes:

  timeconst.bc: The .bc files were not touched
  time.c, timer.c, timekeeping.c: Licence was deduced from EXPORT_SYMBOL_GPL

As those files do not contain direct license references they fall under the
project license, i.e. GPL V2 only.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Kees Cook <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Acked-by: John Stultz <[email protected]>
Acked-by: Corey Minyard <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Russell King <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Cc: David Riley <[email protected]>
Cc: Colin Cross <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

include/linux/hrtimer.h

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  hrtimers - High-resolution kernel timers
  *

kernel/time/alarmtimer.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Alarmtimer interface
  *

kernel/time/clockevents.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file contains functions which manage clock event devices.
  *

kernel/time/clocksource.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * This file contains the functions which manage clocksource drivers.
  *

kernel/time/hrtimer.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright(C) 2005-2006, Thomas Gleixner <[email protected]>
  *  Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar

kernel/time/jiffies.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /***********************************************************************
 * This file contains the jiffies based clocksource.
 *

kernel/time/posix-clock.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Support for dynamic clock devices
  *

kernel/time/posix-stubs.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Dummy stubs used when CONFIG_POSIX_TIMERS=n
  *

kernel/time/posix-timers.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * 2002-10-15  Posix Clocks & timers
  *                           by George Anzinger [email protected]

kernel/time/sched_clock.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generic sched_clock() support, to extend low level hardware time
  * counters to full 64-bit ns values.

kernel/time/test_udelay.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * udelay() test kernel module
  *

kernel/time/tick-broadcast.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file contains functions which emulate a local clock-event
  * device via a broadcast event source.

kernel/time/tick-common.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file contains the base functions to manage periodic tick
  * related events.

kernel/time/tick-oneshot.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file contains functions which manage high resolution tick
  * related events.

kernel/time/tick-sched.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright(C) 2005-2006, Thomas Gleixner <[email protected]>
  *  Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar

kernel/time/time.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *

kernel/time/timeconst.bc

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
 scale=0
 
 define gcd(a,b) {

kernel/time/timeconv.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.0+
 /*
  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
  * This file is part of the GNU C Library.

kernel/time/timecounter.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Based on clocksource code. See commit 74d23cc704d1
  *

kernel/time/timekeeping.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Kernel timekeeping code and accessor functions. Based on code from
  *  timer.c, moved in commit 8524070b7982.

kernel/time/timekeeping_debug.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * debugfs file to track time spent in suspend
  *

kernel/time/timer.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Kernel internal timers
  *

kernel/time/timer_list.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * List pending timers
  *