lguest: clean up lguest_init_IRQ

Copy from arch/x86/kernel/irqinit_32.c: we don't use the vectors beyond
LGUEST_IRQS (if any), but we might as well set them all.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 4 insertions, 5 deletions

diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 4e0c26559395..2392a7a171c2 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -628,13 +628,12 @@ static void __init lguest_init_IRQ(void)
 {
         unsigned int i;
 
-        for (i = 0; i < LGUEST_IRQS; i++) {
-                int vector = FIRST_EXTERNAL_VECTOR + i;
+        for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
                 /* Some systems map "vectors" to interrupts weirdly.  Lguest has
                  * a straightforward 1 to 1 mapping, so force that here. */
-                __get_cpu_var(vector_irq)[vector] = i;
-                if (vector != SYSCALL_VECTOR)
-                        set_intr_gate(vector, interrupt[i]);
+                __get_cpu_var(vector_irq)[i] = i - FIRST_EXTERNAL_VECTOR;
+                if (i != SYSCALL_VECTOR)
+                        set_intr_gate(i, interrupt[i - FIRST_EXTERNAL_VECTOR]);
         }
         /* This call is required to set up for 4k stacks, where we have
          * separate stacks for hard and soft interrupts. */