Fix: signal: Remove SEND_SIG_FORCED (v4.20)

[lttng-modules.git] / wrapper / trace-clock.c

diff --git a/wrapper/trace-clock.c b/wrapper/trace-clock.c
index 1b7a21767289d4f122a6e393bb37a7430c57026b..10e7da01672c38b8d9dec17cd46ce503d948bdd2 100644 (file)
--- a/wrapper/trace-clock.c
+++ b/wrapper/trace-clock.c
@@ -1,29 +1,20 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
  * wrapper/trace-clock.c
  *
  * Contains LTTng trace clock mapping to LTTng trace clock or mainline monotonic
  * clock. This wrapper depends on CONFIG_HIGH_RES_TIMERS=y.
  *
  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "trace-clock.h"
+#include <wrapper/trace-clock.h>
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0))
-DEFINE_PER_CPU(local_t, lttng_last_tsc);
+#ifdef LTTNG_USE_NMI_SAFE_CLOCK
+DEFINE_PER_CPU(u64, lttng_last_tsc);
 EXPORT_PER_CPU_SYMBOL(lttng_last_tsc);
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */
+#endif /* #ifdef LTTNG_USE_NMI_SAFE_CLOCK */
+
+#ifdef LTTNG_CLOCK_NMI_SAFE_BROKEN
+#warning "Your kernel implements a bogus nmi-safe clock source. Falling back to the non-nmi-safe clock source, which discards events traced from NMI context. Upgrade your kernel to resolve this situation."
+#endif