-#ifndef _LTTNG_WRAPPER_KREF_H
-#define _LTTNG_WRAPPER_KREF_H
-
-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
* wrapper/kref.h
*
* wrapper around linux/kref.h.
*
* Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; only version 2 of the License.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
* This wrapper code is derived from Linux 3.19.2 include/linux/list.h
* and include/linux/rculist.h, hence the GPLv2 license applied to this
* file.
*/
+#ifndef _LTTNG_WRAPPER_KREF_H
+#define _LTTNG_WRAPPER_KREF_H
+
#include <linux/kref.h>
#include <linux/rculist.h>
+#include <lttng-kernel-version.h>
/*
* lttng_kref_get: get reference count, checking for overflow.
*
* Return 1 if reference is taken, 0 otherwise (overflow).
*/
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,11,0))
+static inline int lttng_kref_get(struct kref *kref)
+{
+ kref_get(kref);
+ return 1;
+}
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,11,0)) */
static inline int lttng_kref_get(struct kref *kref)
{
return atomic_add_unless(&kref->refcount, 1, INT_MAX);
}
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,11,0)) */
#endif /* _LTTNG_WRAPPER_KREF_H */