linux-kernel - [PATCH] apic/io_apic.c: Move variable 'desc' into the #ifdef.

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Date:	Sun, 28 Nov 2010 23:06:20 -0200
From:	Thiago Farina <tfransosi@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH] apic/io_apic.c: Move variable 'desc' into the #ifdef.

This variable is only used in the presence of the CONFIG_GENERIC_PENDING_IRQ.
So when compiling without this config, we get the following warning:

arch/x86/kernel/apic/io_apic.c: In function ‘ack_apic_level’:
arch/x86/kernel/apic/io_apic.c:2433: warning: unused variable ‘desc’

Signed-off-by: Thiago Farina <tfransosi@...il.com>
---
 arch/x86/kernel/apic/io_apic.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 7cc0a72..56261be 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2430,9 +2430,12 @@ static void ack_apic_level(struct irq_data *data)
 {
 	struct irq_cfg *cfg = data->chip_data;
 	int i, do_unmask_irq = 0, irq = data->irq;
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long v;
 
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+	struct irq_desc *desc = irq_to_desc(irq);
+#endif
+
 	irq_complete_move(cfg);
 #ifdef CONFIG_GENERIC_PENDING_IRQ
 	/* If we are moving the irq we need to mask it */
-- 
1.7.3.2.343.g7d43d

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