powerpc: Make NR_IRQS a CONFIG option

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The irq_desc array consumes quite a lot of space, and for systems
that don't need or can't have 512 irqs it's just wasted space.

The first 16 are reserved for ISA, so the minimum of 32 is really
16 - and no one has asked for more than 512 so leave that as the
maximum.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Michael Ellerman 2009-10-13 19:44:44 +00:00 • committed by Benjamin Herrenschmidt

parent d35ef90bf9

commit 551b81f26f

2 changed files with 12 additions and 2 deletions

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10

arch/powerpc/Kconfig

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4

arch/powerpc/include/asm/irq.h

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