[PATCH] remove duplicate irq instrumentation for MIPS

This patch removes MIPS-specific irq entry and exit instrumentation.

I was getting duplicate events for each irq entry and exit
on a MIPS machine.  I believe this was left over from before
the use of generic interrupt handling by the MIPS arch.
The instrumentation points in handle_IRQ_event() now seem
to generate the appropriate events.

Instead of applying the patch, you can also just delete the
first 2 hunks of changes in
patch-2.6.17-lttng-0.5.113-instrumentation-mips.diff.

Regards,
 -- Tim

diff -u -X /home/tbird/dontdiff -pruN linux.orig/arch/mips/kernel/irq.c linux/arch/mips/kernel/irq.c
--- linux.orig/arch/mips/kernel/irq.c	2006-09-29 14:15:52.000000000 -0700
+++ linux/arch/mips/kernel/irq.c	2006-09-29 14:13:25.000000000 -0700
@@ -22,7 +22,6 @@
 #include <linux/sched.h>
 #include <linux/seq_file.h>
 #include <linux/kallsyms.h>
-#include <linux/ltt/ltt-facility-kernel.h>

 #include <asm/atomic.h>
 #include <asm/system.h>
@@ -60,12 +59,8 @@ asmlinkage unsigned int do_IRQ(unsigned
 	irq_enter();

 	__DO_IRQ_SMTC_HOOK();
-	trace_kernel_irq_entry(irq, !(user_mode(regs)));
-
 	__do_IRQ(irq, regs);

-	trace_kernel_irq_exit();
-
 	irq_exit();

 	return 1;