[tip:x86/apic] x86/irq: Replace numeric constant

[tip-bot for Thomas Gleixner <tipbot@zytor.com>]

Commit-ID:  24c70e07a0311a98dbb5e7a7472fa96a22b789d3
Gitweb:     http://git.kernel.org/tip/24c70e07a0311a98dbb5e7a7472fa96a22b789d3
Author:     Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Sun, 2 Aug 2015 20:38:24 +0000
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 6 Aug 2015 00:14:58 +0200

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>
---
 arch/x86/kernel/irq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index bc28496..35d4cb2 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++;
 		}
 	}