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sparseirq: work around compiler optimizing away __weak functions

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Impact: fix panic on null pointer with sparseirq

Some GCC versions seem to inline the weak global function,
when that function is empty.

Work it around, by making the functions return a (dummy) integer.

Signed-off-by: Yinghai <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-12-26 02:05:47 -08:00 • committed by Ingo Molnar
parent 793f7b12a0
commit 13a0c3c269
4 changed files with 17 additions and 11 deletions
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7
kernel/irq/handle.c
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@ -86,8 +86,9 @@ void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
desc->kstat_irqs = (unsigned int *)ptr;
}
void __attribute__((weak)) arch_init_chip_data(struct irq_desc *desc, int cpu)
int __weak arch_init_chip_data(struct irq_desc *desc, int cpu)
{
return 0;
}
static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
@ -132,7 +133,7 @@ static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_sm
/* FIXME: use bootmem alloc ...*/
static unsigned int kstat_irqs_legacy[NR_IRQS_LEGACY][NR_CPUS];
void __init early_irq_init(void)
int __init early_irq_init(void)
{
struct irq_desc *desc;
int legacy_count;
@ -151,7 +152,7 @@ void __init early_irq_init(void)
for (i = legacy_count; i < NR_IRQS; i++)
irq_desc_ptrs[i] = NULL;
arch_early_irq_init();
return arch_early_irq_init();
}
struct irq_desc *irq_to_desc(unsigned int irq)