1 /* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
5 * wrapper around irq_to_desc. Using KALLSYMS to get its address when
6 * available, else we need to have a kernel that exports this function to GPL
7 * modules. This export was added to the 3.4 kernels.
9 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
12 #include <lttng-kernel-version.h>
14 #if (defined(CONFIG_KALLSYMS) \
15 && (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)))
17 #include <linux/kallsyms.h>
18 #include <linux/interrupt.h>
19 #include <linux/irqnr.h>
20 #include <wrapper/kallsyms.h>
21 #include <wrapper/irqdesc.h>
24 struct irq_desc
*(*irq_to_desc_sym
)(unsigned int irq
);
26 struct irq_desc
*wrapper_irq_to_desc(unsigned int irq
)
29 irq_to_desc_sym
= (void *) kallsyms_lookup_funcptr("irq_to_desc");
30 if (irq_to_desc_sym
) {
31 return irq_to_desc_sym(irq
);
33 printk_once(KERN_WARNING
"LTTng: irq_to_desc symbol lookup failed.\n");
37 EXPORT_SYMBOL_GPL(wrapper_irq_to_desc
);
41 #include <linux/interrupt.h>
42 #include <linux/irqnr.h>
44 struct irq_desc
*wrapper_irq_to_desc(unsigned int irq
)
46 return irq_to_desc(irq
);
48 EXPORT_SYMBOL_GPL(wrapper_irq_to_desc
);
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