[MIPS] Compile __do_IRQ() when really needed

__do_IRQ() is needed only by irq handlers that can't use
default handlers defined in kernel/irq/chip.c.

For others platforms there's no need to compile this function
since it won't be used. For those platforms this patch defines
GENERIC_HARDIRQS_NO__DO_IRQ symbol which is used exactly for
this purpose.

Futhermore for platforms which do not use __do_IRQ(), end()
method which is part of the 'irq_chip' structure is not used.
This patch simply removes this method in this case.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 0 insertions, 8 deletions

diff --git a/arch/mips/philips/pnx8550/common/int.c b/arch/mips/philips/pnx8550/common/int.c
index 0dc23930edbd..2c36c108c4d6 100644
--- a/arch/mips/philips/pnx8550/common/int.c
+++ b/arch/mips/philips/pnx8550/common/int.c
@@ -158,20 +158,12 @@ int pnx8550_set_gic_priority(int irq, int priority)
         return prev_priority;
 }
 
-static void end_irq(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
-                unmask_irq(irq);
-        }
-}
-
 static struct irq_chip level_irq_type = {
         .typename =     "PNX Level IRQ",
         .ack =          mask_irq,
         .mask =         mask_irq,
         .mask_ack =     mask_irq,
         .unmask =       unmask_irq,
-        .end =          end_irq,
 };
 
 static struct irqaction gic_action = {