[PATCH] dmar: use function stubs when CONFIG_INTR_REMAP is disabled

[Randy Dunlap <randy.dunlap@oracle.com>]

From: Randy Dunlap <randy.dunlap@oracle.com>

The stubs for CONFIG_INTR_REMAP disabled need to be functions
instead of values to eliminate build warnings.

arch/x86/kernel/apic/apic.c: In function 'lapic_suspend':
arch/x86/kernel/apic/apic.c:2060:3: warning: statement with no effect
arch/x86/kernel/apic/apic.c: In function 'lapic_resume':
arch/x86/kernel/apic/apic.c:2137:3: warning: statement with no effect

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Reported-by: Fabio Comolli <fabio.comolli@gmail.com>
---
 include/linux/dmar.h |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

--- lnx-2637-rc3.orig/include/linux/dmar.h
+++ lnx-2637-rc3/include/linux/dmar.h
@@ -175,10 +175,21 @@ static inline int set_msi_sid(struct irt
 	return 0;
 }
 
-#define enable_intr_remapping(mode)	(-1)
-#define disable_intr_remapping()	(0)
-#define reenable_intr_remapping(mode)	(0)
 #define intr_remapping_enabled		(0)
+
+static inline int enable_intr_remapping(int eim)
+{
+	return -1;
+}
+
+static inline void disable_intr_remapping(void)
+{
+}
+
+static inline int reenable_intr_remapping(int eim)
+{
+	return 0;
+}
 #endif
 
 /* Can't use the common MSI interrupt functions