[Lguest] [PATCH 7/25][V3] interrupt related native paravirt functions.

[Glauber de Oliveira Costa]

The interrupt initialization routine becomes native_init_IRQ and will
be overriden later in case paravirt is on.

[  updates from v1
   * After a talk with Jeremy Fitzhardinge, it turned out that making the
   interrupt vector global was not a good idea. So it is removed in this
   patch
]
Signed-off-by: Glauber de Oliveira Costa <gcosta at redhat.com>
Signed-off-by: Steven Rostedt <rostedt at goodmis.org>
---
 arch/x86_64/kernel/i8259.c |    5 ++++-
 include/asm-x86_64/irq.h   |    2 ++
 2 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 948cae6..048e3cb 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -484,7 +484,10 @@ static int __init init_timer_sysfs(void)
 
 device_initcall(init_timer_sysfs);
 
-void __init init_IRQ(void)
+/* Overridden in paravirt.c */
+void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
+
+void __init native_init_IRQ(void)
 {
 	int i;
 
diff --git a/include/asm-x86_64/irq.h b/include/asm-x86_64/irq.h
index 5006c6e..be55299 100644
--- a/include/asm-x86_64/irq.h
+++ b/include/asm-x86_64/irq.h
@@ -46,6 +46,8 @@ static __inline__ int irq_canonicalize(int irq)
 extern void fixup_irqs(cpumask_t map);
 #endif
 
+void native_init_IRQ(void);
+
 #define __ARCH_HAS_DO_SOFTIRQ 1
 
 #endif /* _ASM_IRQ_H */
-- 
1.4.4.2