-/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
*
* wrapper/irqdesc.c
*
* wrapper around irq_to_desc. Using KALLSYMS to get its address when
* available, else we need to have a kernel that exports this function to GPL
- * modules.
+ * modules. This export was added to the 3.4 kernels.
*
* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#ifdef CONFIG_KALLSYMS
+#include <lttng-kernel-version.h>
+
+#if (defined(CONFIG_KALLSYMS) \
+ && (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)))
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
struct irq_desc *wrapper_irq_to_desc(unsigned int irq)
{
if (!irq_to_desc_sym)
- irq_to_desc_sym = (void *) kallsyms_lookup_funcptr("irq_to_desc");
+ irq_to_desc_sym = (void *) kallsyms_lookup_funcptr("irq_to_desc");
if (irq_to_desc_sym) {
return irq_to_desc_sym(irq);
} else {
return NULL;
}
}
+EXPORT_SYMBOL_GPL(wrapper_irq_to_desc);
#else
{
return irq_to_desc(irq);
}
+EXPORT_SYMBOL_GPL(wrapper_irq_to_desc);
#endif