[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>

4 files changed, 0 insertions, 35 deletions

diff --git a/arch/mips/kernel/irq-mv6434x.c b/arch/mips/kernel/irq-mv6434x.c
index 6cfb31cafde2..efbd219845b5 100644
--- a/arch/mips/kernel/irq-mv6434x.c
+++ b/arch/mips/kernel/irq-mv6434x.c
@@ -67,15 +67,6 @@ static inline void unmask_mv64340_irq(unsigned int irq)
 }
 
 /*
- * End IRQ processing
- */
-static void end_mv64340_irq(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-                unmask_mv64340_irq(irq);
-}
-
-/*
  * Interrupt handler for interrupts coming from the Marvell chip.
  * It could be built in ethernet ports etc...
  */
@@ -106,7 +97,6 @@ struct irq_chip mv64340_irq_type = {
         .mask = mask_mv64340_irq,
         .mask_ack = mask_mv64340_irq,
         .unmask = unmask_mv64340_irq,
-        .end = end_mv64340_irq,
 };
 
 void __init mv64340_irq_init(unsigned int base)
diff --git a/arch/mips/kernel/irq-rm7000.c b/arch/mips/kernel/irq-rm7000.c
index ddcc2a5f8a06..123324ba8c14 100644
--- a/arch/mips/kernel/irq-rm7000.c
+++ b/arch/mips/kernel/irq-rm7000.c
@@ -29,19 +29,12 @@ static inline void mask_rm7k_irq(unsigned int irq)
         clear_c0_intcontrol(0x100 << (irq - irq_base));
 }
 
-static void rm7k_cpu_irq_end(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
-                unmask_rm7k_irq(irq);
-}
-
 static struct irq_chip rm7k_irq_controller = {
         .typename = "RM7000",
         .ack = mask_rm7k_irq,
         .mask = mask_rm7k_irq,
         .mask_ack = mask_rm7k_irq,
         .unmask = unmask_rm7k_irq,
-        .end = rm7k_cpu_irq_end,
 };
 
 void __init rm7k_cpu_irq_init(int base)
diff --git a/arch/mips/kernel/irq-rm9000.c b/arch/mips/kernel/irq-rm9000.c
index ba6440c88abd..0e6f4c5349d2 100644
--- a/arch/mips/kernel/irq-rm9000.c
+++ b/arch/mips/kernel/irq-rm9000.c
@@ -80,19 +80,12 @@ static void rm9k_perfcounter_irq_shutdown(unsigned int irq)
         on_each_cpu(local_rm9k_perfcounter_irq_shutdown, (void *) irq, 0, 1);
 }
 
-static void rm9k_cpu_irq_end(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
-                unmask_rm9k_irq(irq);
-}
-
 static struct irq_chip rm9k_irq_controller = {
         .typename = "RM9000",
         .ack = mask_rm9k_irq,
         .mask = mask_rm9k_irq,
         .mask_ack = mask_rm9k_irq,
         .unmask = unmask_rm9k_irq,
-        .end = rm9k_cpu_irq_end,
 };
 
 static struct irq_chip rm9k_perfcounter_irq = {
@@ -103,7 +96,6 @@ static struct irq_chip rm9k_perfcounter_irq = {
         .mask = mask_rm9k_irq,
         .mask_ack = mask_rm9k_irq,
         .unmask = unmask_rm9k_irq,
-        .end = rm9k_cpu_irq_end,
 };
 
 unsigned int rm9000_perfcount_irq;
diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c
index be5ac23d3812..fcc86b96ccf6 100644
--- a/arch/mips/kernel/irq_cpu.c
+++ b/arch/mips/kernel/irq_cpu.c
@@ -50,12 +50,6 @@ static inline void mask_mips_irq(unsigned int irq)
         irq_disable_hazard();
 }
 
-static void mips_cpu_irq_end(unsigned int irq)
-{
-        if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
-                unmask_mips_irq(irq);
-}
-
 static struct irq_chip mips_cpu_irq_controller = {
         .typename       = "MIPS",
         .ack            = mask_mips_irq,
@@ -63,7 +57,6 @@ static struct irq_chip mips_cpu_irq_controller = {
         .mask_ack       = mask_mips_irq,
         .unmask         = unmask_mips_irq,
         .eoi            = unmask_mips_irq,
-        .end            = mips_cpu_irq_end,
 };
 
 /*
@@ -96,8 +89,6 @@ static void mips_mt_cpu_irq_ack(unsigned int irq)
         mask_mips_mt_irq(irq);
 }
 
-#define mips_mt_cpu_irq_end mips_cpu_irq_end
-
 static struct irq_chip mips_mt_cpu_irq_controller = {
         .typename       = "MIPS",
         .startup        = mips_mt_cpu_irq_startup,
@@ -106,7 +97,6 @@ static struct irq_chip mips_mt_cpu_irq_controller = {
         .mask_ack       = mips_mt_cpu_irq_ack,
         .unmask         = unmask_mips_mt_irq,
         .eoi            = unmask_mips_mt_irq,
-        .end            = mips_mt_cpu_irq_end,
 };
 
 void __init mips_cpu_irq_init(int irq_base)