+/*
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#ifndef _UST_COMMON_ERR_PTR_H
+#define _UST_COMMON_ERR_PTR_H
+
+#include <urcu/compiler.h>
+#include <unistd.h>
+
+#define MAX_ERRNO 4095
+
+static inline
+int IS_ERR_VALUE(long value)
+{
+ if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO))
+ return 1;
+ else
+ return 0;
+}
+
+static inline
+void *ERR_PTR(long error)
+{
+ return (void *) error;
+}
+
+static inline
+long PTR_ERR(const void *ptr)
+{
+ return (long) ptr;
+}
+
+static inline
+int IS_ERR(const void *ptr)
+{
+ return IS_ERR_VALUE((long) ptr);
+}
+
+#endif /* _UST_COMMON_ERR_PTR_H */