[PATCH RFC] ACPI: (x86) remove useless initial assignment in gsi_to_irq

[zhouzhouyi]

From: Zhouyi Zhou <zhouzhouyi@xxxxxxxxx>

I think in function gsi_to_irq, initial assignment to irq is useless although compiler
may eliminate it during the compilng. 

Signed-off-by: Zhouyi Zhou <yizhouzhou@xxxxxxxxx>
---
 arch/x86/kernel/acpi/boot.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 1dac942..b93d61e 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -103,7 +103,7 @@ static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 
 static unsigned int gsi_to_irq(unsigned int gsi)
 {
-	unsigned int irq = gsi + NR_IRQS_LEGACY;
+	unsigned int irq;
 	unsigned int i;
 
 	for (i = 0; i < NR_IRQS_LEGACY; i++) {
-- 
1.7.10.4

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