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genirq: Remove dead code

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CONFIG_KSTAT_IRQS_ONDEMAND does not exist. It's not worth to implement
it. Use sparse irqs if you care about memory consumption of the
interrupt layer.

Found by undertaker: http://vamos.informatik.uni-erlangen.de/trac/undertaker

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-04 17:33:49 +01:00
parent c305d524e5
commit 44951a60ff
1 changed files with 0 additions and 17 deletions
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17
kernel/irq/irqdesc.c
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@ -251,7 +251,6 @@ int __init early_irq_init(void)
for (i = 0; i < count; i++) {
desc[i].irq_data.irq = i;
desc[i].irq_data.chip = &no_irq_chip;
/* TODO : do this allocation on-demand ... */
desc[i].kstat_irqs = alloc_percpu(unsigned int);
alloc_masks(desc + i, GFP_KERNEL, node);
desc_smp_init(desc + i, node);
@ -277,22 +276,6 @@ static void free_desc(unsigned int irq)
static inline int alloc_descs(unsigned int start, unsigned int cnt, int node)
{
#if defined(CONFIG_KSTAT_IRQS_ONDEMAND)
struct irq_desc *desc;
unsigned int i;
for (i = 0; i < cnt; i++) {
desc = irq_to_desc(start + i);
if (desc && !desc->kstat_irqs) {
unsigned int __percpu *stats = alloc_percpu(unsigned int);
if (!stats)
return -1;
if (cmpxchg(&desc->kstat_irqs, NULL, stats) != NULL)
free_percpu(stats);
}
}
#endif
return start;
}
#endif /* !CONFIG_SPARSE_IRQ */