4 * wrapper around irq_to_desc. Using KALLSYMS to get its address when
5 * available, else we need to have a kernel that exports this function to GPL
8 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; only
13 * version 2.1 of the License.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #ifdef CONFIG_KALLSYMS
27 #include <linux/kallsyms.h>
28 #include <linux/interrupt.h>
29 #include <linux/irqnr.h>
34 struct irq_desc *(*irq_to_desc_sym)(unsigned int irq);
36 struct irq_desc *wrapper_irq_to_desc(unsigned int irq)
39 irq_to_desc_sym = (void *) kallsyms_lookup_funcptr("irq_to_desc");
40 if (irq_to_desc_sym) {
41 return irq_to_desc_sym(irq);
43 printk(KERN_WARNING "LTTng: irq_to_desc symbol lookup failed.\n");
50 #include <linux/interrupt.h>
51 #include <linux/irqnr.h>
53 struct irq_desc *wrapper_irq_to_desc(unsigned int irq)
55 return irq_to_desc(irq);