Drop support for kernels < 3.0 from skb instrumentation

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

diff --git a/lttng-clock.c b/lttng-clock.c
index a5a7eaa3349213b9d64daebf22a93e49b66087c9..6872294bd98a5e4c2825f33357fe9f6040e45fde 100644 (file)
--- a/lttng-clock.c
+++ b/lttng-clock.c
@@ -1,21 +1,8 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
  * lttng-clock.c
  *
  * Copyright (C) 2014 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 <linux/module.h>
@@ -48,7 +35,7 @@ int lttng_clock_register_plugin(struct lttng_trace_clock *ltc,
                goto end;
        }
        /* set clock */
-       ACCESS_ONCE(lttng_trace_clock) = ltc;
+       WRITE_ONCE(lttng_trace_clock, ltc);
        lttng_trace_clock_mod = mod;
 end:
        mutex_unlock(&clock_mutex);
@@ -66,7 +53,7 @@ void lttng_clock_unregister_plugin(struct lttng_trace_clock *ltc,
        }
        WARN_ON_ONCE(lttng_trace_clock_mod != mod);
 
-       ACCESS_ONCE(lttng_trace_clock) = NULL;
+       WRITE_ONCE(lttng_trace_clock, NULL);
        lttng_trace_clock_mod = NULL;
 end:
        mutex_unlock(&clock_mutex);
@@ -83,7 +70,7 @@ void lttng_clock_ref(void)
                ret = try_module_get(lttng_trace_clock_mod);
                if (!ret) {
                        printk(KERN_ERR "LTTng-clock cannot get clock plugin module\n");
-                       ACCESS_ONCE(lttng_trace_clock) = NULL;
+                       WRITE_ONCE(lttng_trace_clock, NULL);
                        lttng_trace_clock_mod = NULL;
                }
        }