AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

powerpc: Convert i8259_lock to raw_spinlock

Browse Source 
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>
This commit is contained in:
Thomas Gleixner 2010-02-18 02:23:11 +00:00 committed by Benjamin Herrenschmidt
parent 7cc8a5e3f5
commit 47e3c9046b
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
arch/powerpc/sysdev/i8259.c
View File

@ -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,