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Subject[PATCH 1/3] xen: Remove unnecessary arch specific xen irq functions.
From: Eric W. Biederman <ebiederm@xmission.com>


Right now xen's use of the x86 and ia64 handle_irq is just bizarre and very
fragile as it is very non-obvious the function exists and is is used by
code out in drivers/.... Luckily using handle_irq is completly unnecessary,
and we can just use the generic irq apis instead.
This still leaves drivers/xen/events.c as a problematic user of the generic
irq apis it has "static struct irq_info irq_info[NR_IRQS]" but that can be
fixed some other time.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
arch/ia64/include/asm/xen/events.h | 4 ----
drivers/xen/events.c | 8 ++++++--
2 files changed, 6 insertions(+), 6 deletions(-)
Index: linux-2.6/arch/ia64/include/asm/xen/events.h
===================================================================
--- linux-2.6.orig/arch/ia64/include/asm/xen/events.h
+++ linux-2.6/arch/ia64/include/asm/xen/events.h
@@ -36,10 +36,6 @@ static inline int xen_irqs_disabled(stru
return !(ia64_psr(regs)->i);
}

-static inline void handle_irq(int irq, struct pt_regs *regs)
-{
- __do_IRQ(irq);
-}
#define irq_ctx_init(cpu) do { } while (0)

#endif /* _ASM_IA64_XEN_EVENTS_H */
Index: linux-2.6/drivers/xen/events.c
===================================================================
--- linux-2.6.orig/drivers/xen/events.c
+++ linux-2.6/drivers/xen/events.c
@@ -649,9 +649,13 @@ void xen_evtchn_do_upcall(struct pt_regs
int bit_idx = __ffs(pending_bits);
int port = (word_idx * BITS_PER_LONG) + bit_idx;
int irq = evtchn_to_irq[port];
+ struct irq_desc *desc;

- if (irq != -1)
- handle_irq(irq, regs);
+ if (irq != -1) {
+ desc = irq_to_desc(irq);
+ if (desc)
+ generic_handle_irq_desc(irq, desc);
+ }
}
}


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