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
6 * modules. This export was added to the 3.4 kernels.
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 #include <lttng-kernel-version.h>
27 #if (defined(CONFIG_KALLSYMS) \
28 && (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)))
30 #include <linux/kallsyms.h>
31 #include <linux/interrupt.h>
32 #include <linux/irqnr.h>
33 #include <wrapper/kallsyms.h>
34 #include <wrapper/irqdesc.h>
37 struct irq_desc
*(*irq_to_desc_sym
)(unsigned int irq
);
39 struct irq_desc
*wrapper_irq_to_desc(unsigned int irq
)
42 irq_to_desc_sym
= (void *) kallsyms_lookup_funcptr("irq_to_desc");
43 if (irq_to_desc_sym
) {
44 return irq_to_desc_sym(irq
);
46 printk_once(KERN_WARNING
"LTTng: irq_to_desc symbol lookup failed.\n");
53 #include <linux/interrupt.h>
54 #include <linux/irqnr.h>
56 struct irq_desc
*wrapper_irq_to_desc(unsigned int irq
)
58 return irq_to_desc(irq
);
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