powerpc: Convert i8259_lock to raw_spinlock

i8259_lock needs to be a real spinlock in RT. Convert it to
raw_spinlock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/sysdev/i8259.c b/arch/powerpc/sysdev/i8259.c
index d325817..6323e70 100644 (file)
--- a/arch/powerpc/sysdev/i8259.c
+++ b/arch/powerpc/sysdev/i8259.c
@@ -23,7 +23,7 @@ static unsigned char cached_8259[2] = { 0xff, 0xff };
 #define cached_A1 (cached_8259[0])
 #define cached_21 (cached_8259[1])
 
-static DEFINE_SPINLOCK(i8259_lock);
+static DEFINE_RAW_SPINLOCK(i8259_lock);
 
 static struct irq_host *i8259_host;
 
@@ -42,7 +42,7 @@ unsigned int i8259_irq(void)
        if (pci_intack)
                irq = readb(pci_intack);
        else {
-               spin_lock(&i8259_lock);
+               raw_spin_lock(&i8259_lock);
                lock = 1;
 
                /* Perform an interrupt acknowledge cycle on controller 1. */
@@ -74,7 +74,7 @@ unsigned int i8259_irq(void)
                irq = NO_IRQ;
 
        if (lock)
-               spin_unlock(&i8259_lock);
+               raw_spin_unlock(&i8259_lock);
        return irq;
 }
 
@@ -82,7 +82,7 @@ static void i8259_mask_and_ack_irq(unsigned int irq_nr)
 {
        unsigned long flags;
 
-       spin_lock_irqsave(&i8259_lock, flags);
+       raw_spin_lock_irqsave(&i8259_lock, flags);
        if (irq_nr > 7) {
                cached_A1 |= 1 << (irq_nr-8);
                inb(0xA1);      /* DUMMY */
@@ -95,7 +95,7 @@ static void i8259_mask_and_ack_irq(unsigned int irq_nr)
                outb(cached_21, 0x21);
                outb(0x20, 0x20);       /* Non-specific EOI */
        }
-       spin_unlock_irqrestore(&i8259_lock, flags);
+       raw_spin_unlock_irqrestore(&i8259_lock, flags);
 }
 
 static void i8259_set_irq_mask(int irq_nr)
@@ -110,13 +110,13 @@ static void i8259_mask_irq(unsigned int irq_nr)
 
        pr_debug("i8259_mask_irq(%d)\n", irq_nr);
 
-       spin_lock_irqsave(&i8259_lock, flags);
+       raw_spin_lock_irqsave(&i8259_lock, flags);
        if (irq_nr < 8)
                cached_21 |= 1 << irq_nr;
        else
                cached_A1 |= 1 << (irq_nr-8);
        i8259_set_irq_mask(irq_nr);
-       spin_unlock_irqrestore(&i8259_lock, flags);
+       raw_spin_unlock_irqrestore(&i8259_lock, flags);
 }
 
 static void i8259_unmask_irq(unsigned int irq_nr)
@@ -125,13 +125,13 @@ static void i8259_unmask_irq(unsigned int irq_nr)
 
        pr_debug("i8259_unmask_irq(%d)\n", irq_nr);
 
-       spin_lock_irqsave(&i8259_lock, flags);
+       raw_spin_lock_irqsave(&i8259_lock, flags);
        if (irq_nr < 8)
                cached_21 &= ~(1 << irq_nr);
        else
                cached_A1 &= ~(1 << (irq_nr-8));
        i8259_set_irq_mask(irq_nr);
-       spin_unlock_irqrestore(&i8259_lock, flags);
+       raw_spin_unlock_irqrestore(&i8259_lock, flags);
 }
 
 static struct irq_chip i8259_pic = {
@@ -241,7 +241,7 @@ void i8259_init(struct device_node *node, unsigned long intack_addr)
        unsigned long flags;
 
        /* initialize the controller */
-       spin_lock_irqsave(&i8259_lock, flags);
+       raw_spin_lock_irqsave(&i8259_lock, flags);
 
        /* Mask all first */
        outb(0xff, 0xA1);
@@ -273,7 +273,7 @@ void i8259_init(struct device_node *node, unsigned long intack_addr)
        outb(cached_A1, 0xA1);
        outb(cached_21, 0x21);
 
-       spin_unlock_irqrestore(&i8259_lock, flags);
+       raw_spin_unlock_irqrestore(&i8259_lock, flags);
 
        /* create a legacy host */
        i8259_host = irq_alloc_host(node, IRQ_HOST_MAP_LEGACY,