/usr/src/lttng-modules-2.5.1/wrapper/irqdesc.c is in lttng-modules-dkms 2.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | /*
* wrapper/irqdesc.c
*
* wrapper around irq_to_desc. Using KALLSYMS to get its address when
* available, else we need to have a kernel that exports this function to GPL
* modules.
*
* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; only
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef CONFIG_KALLSYMS
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
#include <linux/irqnr.h>
#include "kallsyms.h"
#include "irqdesc.h"
static
struct irq_desc *(*irq_to_desc_sym)(unsigned int irq);
struct irq_desc *wrapper_irq_to_desc(unsigned int irq)
{
if (!irq_to_desc_sym)
irq_to_desc_sym = (void *) kallsyms_lookup_funcptr("irq_to_desc");
if (irq_to_desc_sym) {
return irq_to_desc_sym(irq);
} else {
printk(KERN_WARNING "LTTng: irq_to_desc symbol lookup failed.\n");
return NULL;
}
}
#else
#include <linux/interrupt.h>
#include <linux/irqnr.h>
struct irq_desc *wrapper_irq_to_desc(unsigned int irq)
{
return irq_to_desc(irq);
}
#endif
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