fix: Use 'kernel_read' to read from procfs

[lttng-modules.git] / lttng-context-perf-counters.c

diff --git a/lttng-context-perf-counters.c b/lttng-context-perf-counters.c
index 260e5d0d9a5873cef635b93bbc93548d70104a46..9887c6d208a27917d6f467ec3234811722d8cba1 100644 (file)
--- a/lttng-context-perf-counters.c
+++ b/lttng-context-perf-counters.c
@@ -1,23 +1,10 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
  * lttng-context-perf-counters.c
  *
  * LTTng performance monitoring counters (perf-counters) integration module.
  *
  * Copyright (C) 2009-2012 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 <linux/module.h>
@@ -72,7 +59,7 @@ void perf_counter_record(struct lttng_ctx_field *field,
        chan->ops->event_write(ctx, &value, sizeof(value));
 }
 
-#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,99))
+#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
 static
 void overflow_callback(struct perf_event *event,
                       struct perf_sample_data *data,
@@ -334,7 +321,7 @@ int lttng_add_perf_counter_to_ctx(uint32_t type,
        field->u.perf_counter = perf_field;
        lttng_context_update(*ctx);
 
-       wrapper_vmalloc_sync_all();
+       wrapper_vmalloc_sync_mappings();
        return 0;
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))