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x86/ioapic.c: convert io_apic_level_ack_pending loop to normal for() loop

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Convert the unconventional loop in io_apic_level_ack_pending() to
a conventional for() loop.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2009-06-08 03:17:58 -07:00
parent 8e13d697fe
commit d8c52063ed
1 changed files with 1 additions and 7 deletions
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8
arch/x86/kernel/apic/io_apic.c
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@ -410,13 +410,10 @@ static bool io_apic_level_ack_pending(struct irq_cfg *cfg)
unsigned long flags; unsigned long flags;
spin_lock_irqsave(&ioapic_lock, flags); spin_lock_irqsave(&ioapic_lock, flags);
entry = cfg->irq_2_pin; for (entry = cfg->irq_2_pin; entry != NULL; entry = entry->next) {
for (;;) {
unsigned int reg; unsigned int reg;
int pin; int pin;
if (!entry)
break;
pin = entry->pin; pin = entry->pin;
reg = io_apic_read(entry->apic, 0x10 + pin*2); reg = io_apic_read(entry->apic, 0x10 + pin*2);
/* Is the remote IRR bit set? */ /* Is the remote IRR bit set? */
@ -424,9 +421,6 @@ static bool io_apic_level_ack_pending(struct irq_cfg *cfg)
spin_unlock_irqrestore(&ioapic_lock, flags); spin_unlock_irqrestore(&ioapic_lock, flags);
return true; return true;
} }
if (!entry->next)
break;
entry = entry->next;
} }
spin_unlock_irqrestore(&ioapic_lock, flags); spin_unlock_irqrestore(&ioapic_lock, flags);