xen: Remove unnecessary arch specific xen irq functions.

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 completely 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>
LKML-Reference: <4B7CAAD2.10803@kernel.org>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index ce602dd09bc1..2f8413794d05 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -649,9 +649,13 @@ void xen_evtchn_do_upcall(struct pt_regs *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);
+                                }
                         }
                 }