Christoph Hellwig f1ba9a5b2a
powerpc: Unconditionally enabled irq stacks ...
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 >
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