projects / deliverable / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| c337ddc2 | 1 | /* |
| 886d51a3 | 2 | * wrapper/irqdesc.c |
| c337ddc2 MD |
3 | * |
| 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. | |
| 7 | * | |
| 886d51a3 MD |
8 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * | |
| 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. | |
| 14 | * | |
| 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. | |
| 19 | * | |
| 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 | |
| c337ddc2 MD |
23 | */ |
| 24 | ||
| 25 | #ifdef CONFIG_KALLSYMS | |
| 26 | ||
| 27 | #include <linux/kallsyms.h> | |
| 28 | #include <linux/interrupt.h> | |
| 29 | #include <linux/irqnr.h> | |
| 30 | #include "kallsyms.h" | |
| 31 | #include "irqdesc.h" | |
| 32 | ||
| 33 | static | |
| 34 | struct irq_desc *(*irq_to_desc_sym)(unsigned int irq); | |
| 35 | ||
| 36 | struct irq_desc *wrapper_irq_to_desc(unsigned int irq) | |
| 37 | { | |
| 38 | if (!irq_to_desc_sym) | |
| 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); | |
| 42 | } else { | |
| 43 | printk(KERN_WARNING "LTTng: irq_to_desc symbol lookup failed.\n"); | |
| 44 | return NULL; | |
| 45 | } | |
| 46 | } | |
| 47 | ||
| 48 | #else | |
| 49 | ||
| 50 | #include <linux/interrupt.h> | |
| 51 | #include <linux/irqnr.h> | |
| 52 | ||
| 53 | struct irq_desc *wrapper_irq_to_desc(unsigned int irq) | |
| 54 | { | |
| 55 | return irq_to_desc(irq); | |
| 56 | } | |
| 57 | ||
| 58 | #endif |