Signed-off-by: Sven Eckelmann sven@narfation.org --- v2: - split patchset into fixes and kref migration to make it easier when the decision is made where each patch will be applied
compat-include/linux/kref.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 compat-include/linux/kref.h
diff --git a/compat-include/linux/kref.h b/compat-include/linux/kref.h new file mode 100644 index 0000000..08b6328 --- /dev/null +++ b/compat-include/linux/kref.h @@ -0,0 +1,39 @@ +/* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * 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, see http://www.gnu.org/licenses/. + * + * This file contains macros for maintaining compatibility with older versions + * of the Linux kernel. + */ + +#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_KREF_H_ +#define _NET_BATMAN_ADV_COMPAT_LINUX_KREF_H_ + +#include <linux/version.h> +#include_next <linux/kref.h> + +#include <linux/atomic.h> +#include <linux/kernel.h> + +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 8, 0) + +static inline int __must_check kref_get_unless_zero(struct kref *kref) +{ + return atomic_add_unless(&kref->refcount, 1, 0); +} + +#endif /* < KERNEL_VERSION(3, 8, 0) */ + +#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_KREF_H_ */