1 files changed, 4 insertions, 6 deletions

diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index e6b82b17b072..dc27705f5443 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -320,16 +320,14 @@ static inline void set_intr_gate(unsigned int n, void *addr)
         _set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
 }
 
-#define SYS_VECTOR_FREE         0
-#define SYS_VECTOR_ALLOCED      1
-
 extern int first_system_vector;
-extern char system_vectors[];
+/* used_vectors is BITMAP for irq is not managed by percpu vector_irq */
+extern unsigned long used_vectors[];
 
 static inline void alloc_system_vector(int vector)
 {
-        if (system_vectors[vector] == SYS_VECTOR_FREE) {
-                system_vectors[vector] = SYS_VECTOR_ALLOCED;
+        if (!test_bit(vector, used_vectors)) {
+                set_bit(vector, used_vectors);
                 if (first_system_vector > vector)
                         first_system_vector = vector;
         } else