[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, 7 deletions

diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c
index 5c4f50cdf157..f8d417b5c2bb 100644
--- a/arch/mips/jazz/irq.c
+++ b/arch/mips/jazz/irq.c
@@ -39,19 +39,12 @@ void disable_r4030_irq(unsigned int irq)
         spin_unlock_irqrestore(&r4030_lock, flags);
 }
 
-static void end_r4030_irq(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-                enable_r4030_irq(irq);
-}
-
 static struct irq_chip r4030_irq_type = {
         .typename = "R4030",
         .ack = disable_r4030_irq,
         .mask = disable_r4030_irq,
         .mask_ack = disable_r4030_irq,
         .unmask = enable_r4030_irq,
-        .end = end_r4030_irq,
 };
 
 void __init init_r4030_ints(void)