[ARM] 3686/1: ARM: arm/common: convert irq handling

Patch from Thomas Gleixner

From: Thomas Gleixner <tglx@linutronix.de>

Convert the files in arch/arm/common to use the generic
irq handling functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 16 insertions, 2 deletions

diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index c02dc8116a18..f3c1ebfdd0aa 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -33,6 +33,7 @@
 
 static void __iomem *gic_dist_base;
 static void __iomem *gic_cpu_base;
+static DEFINE_SPINLOCK(irq_controller_lock);
 
 /*
  * Routines to acknowledge, disable and enable interrupts
@@ -52,32 +53,45 @@ static void __iomem *gic_cpu_base;
 static void gic_ack_irq(unsigned int irq)
 {
         u32 mask = 1 << (irq % 32);
+
+        spin_lock(&irq_controller_lock);
         writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
         writel(irq, gic_cpu_base + GIC_CPU_EOI);
+        spin_unlock(&irq_controller_lock);
 }
 
 static void gic_mask_irq(unsigned int irq)
 {
         u32 mask = 1 << (irq % 32);
+
+        spin_lock(&irq_controller_lock);
         writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4);
+        spin_unlock(&irq_controller_lock);
 }
 
 static void gic_unmask_irq(unsigned int irq)
 {
         u32 mask = 1 << (irq % 32);
+
+        spin_lock(&irq_controller_lock);
         writel(mask, gic_dist_base + GIC_DIST_ENABLE_SET + (irq / 32) * 4);
+        spin_unlock(&irq_controller_lock);
 }
 
 #ifdef CONFIG_SMP
-static void gic_set_cpu(struct irqdesc *desc, unsigned int irq, unsigned int cpu)
+static void gic_set_cpu(unsigned int irq, cpumask_t mask_val)
 {
         void __iomem *reg = gic_dist_base + GIC_DIST_TARGET + (irq & ~3);
         unsigned int shift = (irq % 4) * 8;
+        unsigned int cpu = first_cpu(mask_val);
         u32 val;
 
+        spin_lock(&irq_controller_lock);
+        irq_desc[irq].cpu = cpu;
         val = readl(reg) & ~(0xff << shift);
         val |= 1 << (cpu + shift);
         writel(val, reg);
+        spin_unlock(&irq_controller_lock);
 }
 #endif
 
@@ -86,7 +100,7 @@ static struct irqchip gic_chip = {
         .mask           = gic_mask_irq,
         .unmask         = gic_unmask_irq,
 #ifdef CONFIG_SMP
-        .set_cpu        = gic_set_cpu,
+        .set_affinity   = gic_set_cpu,
 #endif
 };