x86/irq: Replace numeric constant

Use the proper define instead of 0.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Link: http://lkml.kernel.org/r/20150802203609.385495420@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index bc28496fd196..35d4cb287771 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -401,8 +401,8 @@ int check_irq_vectors_for_cpu_disable(void)
                 for (vector = FIRST_EXTERNAL_VECTOR;
                      vector < first_system_vector; vector++) {
                         if (!test_bit(vector, used_vectors) &&
-                            per_cpu(vector_irq, cpu)[vector] < 0)
-                                        count++;
+                            per_cpu(vector_irq, cpu)[vector] <= VECTOR_UNDEFINED)
+                                count++;
                 }
         }