projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 9f36eaed MJ |
1 | /* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1) |
| 2 | * | |
| 886d51a3 | 3 | * wrapper/irqdesc.c |
| c337ddc2 MD |
4 | * |
| 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. | |
| 8 | * | |
| 886d51a3 | 9 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| c337ddc2 MD |
10 | */ |
| 11 | ||
| 12 | #ifdef CONFIG_KALLSYMS | |
| 13 | ||
| 14 | #include <linux/kallsyms.h> | |
| 15 | #include <linux/interrupt.h> | |
| 16 | #include <linux/irqnr.h> | |
| 5a2f5e92 MD |
17 | #include <wrapper/kallsyms.h> |
| 18 | #include <wrapper/irqdesc.h> | |
| c337ddc2 MD |
19 | |
| 20 | static | |
| 21 | struct irq_desc *(*irq_to_desc_sym)(unsigned int irq); | |
| 22 | ||
| 23 | struct irq_desc *wrapper_irq_to_desc(unsigned int irq) | |
| 24 | { | |
| 25 | if (!irq_to_desc_sym) | |
| 1e543e7c | 26 | irq_to_desc_sym = (void *) kallsyms_lookup_funcptr("irq_to_desc"); |
| c337ddc2 MD |
27 | if (irq_to_desc_sym) { |
| 28 | return irq_to_desc_sym(irq); | |
| 29 | } else { | |
| e36de50d | 30 | printk_once(KERN_WARNING "LTTng: irq_to_desc symbol lookup failed.\n"); |
| c337ddc2 MD |
31 | return NULL; |
| 32 | } | |
| 33 | } | |
| 34 | ||
| 35 | #else | |
| 36 | ||
| 37 | #include <linux/interrupt.h> | |
| 38 | #include <linux/irqnr.h> | |
| 39 | ||
| 40 | struct irq_desc *wrapper_irq_to_desc(unsigned int irq) | |
| 41 | { | |
| 42 | return irq_to_desc(irq); | |
| 43 | } | |
| 44 | ||
| 45 | #endif |