1 /* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
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 and removed in 5.11.
9 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
12 #include <lttng/kernel-version.h>
13 #include <linux/module.h>
15 #if (defined(CONFIG_KALLSYMS) && \
16 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0)))
18 #include <linux/kallsyms.h>
19 #include <linux/interrupt.h>
20 #include <linux/irqnr.h>
21 #include <wrapper/kallsyms.h>
22 #include <wrapper/irqdesc.h>
25 struct irq_desc
*(*irq_to_desc_sym
)(unsigned int irq
);
27 struct irq_desc
*wrapper_irq_to_desc(unsigned int irq
)
30 irq_to_desc_sym
= (void *) kallsyms_lookup_funcptr("irq_to_desc");
31 if (irq_to_desc_sym
) {
32 struct irq_ibt_state irq_ibt_state
;
35 irq_ibt_state
= wrapper_irq_ibt_save();
36 ret
= irq_to_desc_sym(irq
);
37 wrapper_irq_ibt_restore(irq_ibt_state
);
40 printk_once(KERN_WARNING
"LTTng: irq_to_desc symbol lookup failed.\n");
44 EXPORT_SYMBOL_GPL(wrapper_irq_to_desc
);
48 #include <linux/interrupt.h>
49 #include <linux/irqnr.h>
51 struct irq_desc
*wrapper_irq_to_desc(unsigned int irq
)
53 return irq_to_desc(irq
);
55 EXPORT_SYMBOL_GPL(wrapper_irq_to_desc
);