From: Chris Metcalf <cmetcalf@tilera.com>
Date: Fri, 9 Aug 2013 19:41:09 +0000 (-0400)
Subject: tile: fix panic with large IRQ number
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=8d8cf0674023da578e0539dc7cf4d824b2cf1f9e;p=deliverable%2Flinux.git

tile: fix panic with large IRQ number

The "available_irqs" value needs to actually reflect the IRQs
available, not just start as an all-ones mask, since we only
have 32 IRQs available even on a 64-bit platform.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
---

diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c
index c90de6c3cb7f..0e6c521b8a89 100644
--- a/arch/tile/kernel/irq.c
+++ b/arch/tile/kernel/irq.c
@@ -55,7 +55,8 @@ static DEFINE_PER_CPU(int, irq_depth);
 
 /* State for allocating IRQs on Gx. */
 #if CHIP_HAS_IPI()
-static unsigned long available_irqs = ~(1UL << IRQ_RESCHEDULE);
+static unsigned long available_irqs = ((1UL << NR_IRQS) - 1) &
+				      (~(1UL << IRQ_RESCHEDULE));
 static DEFINE_SPINLOCK(available_irqs_lock);
 #endif