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SubjectRe: [PATCH HACK] powerpc: quick hack to get a functional eHEA with hardirq preemption, eHCA is close

I think these are the "functional" changes that need to be included in
the ibmebus driver. We'll add a RT flag in the final version to enable
these changes only for RT-Linux for now.
Ben, can you / your team look into the implementation
of the set_irq_type functionality needed for XICS?

Jan-Bernd & Christoph

diff -Nurp b/arch/powerpc/kernel/ibmebus.c a/arch/powerpc/kernel/ibmebus.c
--- b/arch/powerpc/kernel/ibmebus.c 2008-09-22 00:29:55.000000000 +0200
+++ a/arch/powerpc/kernel/ibmebus.c 2008-09-23 12:04:53.000000000 +0200
@@ -216,12 +216,16 @@ int ibmebus_request_irq(u32 ist, irq_han
unsigned long irq_flags, const char *devname,
void *dev_id)
+ int ret;
unsigned int irq = irq_create_mapping(NULL, ist);

if (irq == NO_IRQ)
return -EINVAL;

- return request_irq(irq, handler, irq_flags, devname, dev_id);
+ ret = request_irq(irq, handler, irq_flags, devname, dev_id);
+ set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
+ return ret;

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