Add script to automate the syscall extraction process

[lttng-modules.git] / wrapper / irqdesc.c

diff --git a/wrapper/irqdesc.c b/wrapper/irqdesc.c
index 1d6e2890d395a4b5f189cf06a73aab67407fa41e..018065640e22410e9390d53c46d19e51afaa6755 100644 (file)
--- a/wrapper/irqdesc.c
+++ b/wrapper/irqdesc.c
@@ -4,12 +4,15 @@
  *
  * 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.
+ * modules. This export was added to the 3.4 kernels.
  *
  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  */
 
-#ifdef CONFIG_KALLSYMS
+#include <lttng-kernel-version.h>
+
+#if (defined(CONFIG_KALLSYMS) \
+       && (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)))
 
 #include <linux/kallsyms.h>
 #include <linux/interrupt.h>
@@ -23,7 +26,7 @@ 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"); 
+               irq_to_desc_sym = (void *) kallsyms_lookup_funcptr("irq_to_desc");
        if (irq_to_desc_sym) {
                return irq_to_desc_sym(irq);
        } else {