-#ifndef _LTTNG_TRACE_CLOCK_H
-#define _LTTNG_TRACE_CLOCK_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
* wrapper/trace-clock.h
*
* 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
*/
+#ifndef _LTTNG_TRACE_CLOCK_H
+#define _LTTNG_TRACE_CLOCK_H
+
#ifdef CONFIG_HAVE_TRACE_CLOCK
#include <linux/trace-clock.h>
#else /* CONFIG_HAVE_TRACE_CLOCK */
#include <linux/time.h>
#include <linux/hrtimer.h>
#include <linux/percpu.h>
-#include <linux/version.h>
+#include <lttng-kernel-version.h>
#include <asm/local.h>
#include <lttng-kernel-version.h>
#include <lttng-clock.h>
#include <wrapper/compiler.h>
#include <wrapper/percpu-defs.h>
#include <wrapper/random.h>
-
-#if ((LTTNG_KERNEL_RANGE(3,10,0, 3,10,14) && !LTTNG_RHEL_KERNEL_RANGE(3,10,0,123,0,0, 3,10,14,0,0,0)) \
- || LTTNG_KERNEL_RANGE(3,11,0, 3,11,3))
-#error "Linux kernels 3.10 and 3.11 introduce a deadlock in the timekeeping subsystem. Fixed by commit 7bd36014460f793c19e7d6c94dab67b0afcfcb7f \"timekeeping: Fix HRTICK related deadlock from ntp lock changes\" in Linux."
-#endif
+#include <blacklist/timekeeping.h>
extern struct lttng_trace_clock *lttng_trace_clock;
* this feature on 64-bit architectures.
*/
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0) \
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,17,0) \
&& BITS_PER_LONG == 64 \
&& !defined(LTTNG_CLOCK_NMI_SAFE_BROKEN))
#define LTTNG_USE_NMI_SAFE_CLOCK
static inline u64 trace_clock_read64(void)
{
- struct lttng_trace_clock *ltc = READ_ONCE(lttng_trace_clock);
+ struct lttng_trace_clock *ltc = LTTNG_READ_ONCE(lttng_trace_clock);
if (likely(!ltc)) {
return trace_clock_read64_monotonic();
} else {
- read_barrier_depends(); /* load ltc before content */
return ltc->read64();
}
}
static inline u64 trace_clock_freq(void)
{
- struct lttng_trace_clock *ltc = READ_ONCE(lttng_trace_clock);
+ struct lttng_trace_clock *ltc = LTTNG_READ_ONCE(lttng_trace_clock);
if (!ltc) {
return trace_clock_freq_monotonic();
} else {
- read_barrier_depends(); /* load ltc before content */
return ltc->freq();
}
}
static inline int trace_clock_uuid(char *uuid)
{
- struct lttng_trace_clock *ltc = READ_ONCE(lttng_trace_clock);
+ struct lttng_trace_clock *ltc = LTTNG_READ_ONCE(lttng_trace_clock);
- read_barrier_depends(); /* load ltc before content */
/* Use default UUID cb when NULL */
if (!ltc || !ltc->uuid) {
return trace_clock_uuid_monotonic(uuid);
static inline const char *trace_clock_name(void)
{
- struct lttng_trace_clock *ltc = READ_ONCE(lttng_trace_clock);
+ struct lttng_trace_clock *ltc = LTTNG_READ_ONCE(lttng_trace_clock);
if (!ltc) {
return trace_clock_name_monotonic();
} else {
- read_barrier_depends(); /* load ltc before content */
return ltc->name();
}
}
static inline const char *trace_clock_description(void)
{
- struct lttng_trace_clock *ltc = READ_ONCE(lttng_trace_clock);
+ struct lttng_trace_clock *ltc = LTTNG_READ_ONCE(lttng_trace_clock);
if (!ltc) {
return trace_clock_description_monotonic();
} else {
- read_barrier_depends(); /* load ltc before content */
return ltc->description();
}
}