linux-kernel - [tip:irq/core] x86/irq: Fix kbuild warning in smp_irq_move_cleanup

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Date:	Mon, 13 Jan 2014 07:57:25 -0800
From:	tip-bot for Prarit Bhargava <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	konrad.wilk@...cle.com, joro@...tes.org, tglx@...utronix.de,
	sebastian@...akpoint.cc, prarit@...hat.com, fengguang.wu@...el.com
Subject: [tip:irq/core] x86/irq:
  Fix kbuild warning in smp_irq_move_cleanup_interrupt()

Commit-ID:  c7a730fa4624092e2d1c0cb7b750816e87c32364
Gitweb:     http://git.kernel.org/tip/c7a730fa4624092e2d1c0cb7b750816e87c32364
Author:     Prarit Bhargava <prarit@...hat.com>
AuthorDate: Mon, 13 Jan 2014 08:40:20 -0500
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 13 Jan 2014 15:08:37 +0100

x86/irq: Fix kbuild warning in smp_irq_move_cleanup_interrupt()

Fengguang Wu's 0day kernel build service reported the following build warning:

  arch/x86/kernel/apic/io_apic.c:2211
  smp_irq_move_cleanup_interrupt() warn: always true condition '(irq <= -1) => (0-u32max <= (-1))'

because irq is defined as an unsigned int instead of an int.
Fix this trivial error by redefining irq as a signed int.  The
remaining consumers of the int are okay.

Signed-off-by: Prarit Bhargava <prarit@...hat.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Fengguang Wu <fengguang.wu@...el.com>
Link: http://lkml.kernel.org/r/1389620420-7110-1-git-send-email-prarit@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/apic/io_apic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 6df0b66..a43f068 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2202,7 +2202,7 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
 
 	me = smp_processor_id();
 	for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
-		unsigned int irq;
+		int irq;
 		unsigned int irr;
 		struct irq_desc *desc;
 		struct irq_cfg *cfg;
--
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