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powerpc: Unconditionally enabled irq stacks

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Irq stacks provide an essential protection from stack overflows through
external interrupts, at the cost of two additionals stacks per CPU.

Enable them unconditionally to simplify the kernel build and prevent
people from accidentally disabling them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Christoph Hellwig
2010-06-02 22:24:26 +00:00
committed by Benjamin Herrenschmidt
parent b636f1379e
commit f1ba9a5b2a
8 changed files with 0 additions and 42 deletions
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4
arch/powerpc/kernel/setup_64.c
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@@ -432,7 +432,6 @@ static u64 slb0_limit(void)
return 1UL << SID_SHIFT;
}
#ifdef CONFIG_IRQSTACKS
static void __init irqstack_early_init(void)
{
u64 limit = slb0_limit();
@@ -451,9 +450,6 @@ static void __init irqstack_early_init(void)
THREAD_SIZE, limit));
}
}
#else
#define irqstack_early_init()
#endif
#ifdef CONFIG_PPC_BOOK3E
static void __init exc_lvl_early_init(void)