Blackfin arch: delete old comments and NO_IRQ define

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/include/asm/irq.h

@@ -17,42 +17,10 @@
 #ifndef _BFIN_IRQ_H_
 #define _BFIN_IRQ_H_
 
+/* SYS_IRQS and NR_IRQS are defined in <mach-bf5xx/irq.h>*/
 #include <mach/irq.h>
 #include <asm/ptrace.h>
 
-/*******************************************************************************
- *****   INTRODUCTION ***********
- *   On the Blackfin, the interrupt structure allows remmapping of the hardware
- *   levels.
- * - I'm going to assume that the H/W level is going to stay at the default
- *   settings. If someone wants to go through and abstart this out, feel free
- *   to mod the interrupt numbering scheme.
- * - I'm abstracting the interrupts so that uClinux does not know anything
- *   about the H/W levels. If you want to change the H/W AND keep the abstracted
- *   levels that uClinux sees, you should be able to do most of it here.
- * - I've left the "abstract" numbering sparce in case someone wants to pull the
- *   interrupts apart (just the TX/RX for the various devices)
- *******************************************************************************/
-
-/* SYS_IRQS and NR_IRQS are defined in <mach-bf5xx/irq.h>*/
-
-/*
- * Machine specific interrupt sources.
- *
- * Adding an interrupt service routine for a source with this bit
- * set indicates a special machine specific interrupt source.
- * The machine specific files define these sources.
- *
- * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
- * introduce unnecessary overhead.
- *
- * All interrupt handling is actually machine specific so it is better
- * to use function pointers, as used by the Sparc port, and select the
- * interrupt handling functions when initializing the kernel. This way
- * we save some unnecessary overhead at run-time.
- *                                                      01/11/97 - Jes
- */
-
 extern void ack_bad_irq(unsigned int irq);
 
 static __inline__ int irq_canonicalize(int irq)
@@ -60,13 +28,6 @@ static __inline__ int irq_canonicalize(int irq)
 	return irq;
 }
 
-/* count of spurious interrupts */
-/* extern volatile unsigned int num_spurious; */
-
-#ifndef NO_IRQ
-#define NO_IRQ ((unsigned int)(-1))
-#endif
-
 #define SIC_SYSIRQ(irq)	(irq - (IRQ_CORETMR + 1))
 
 #endif				/* _BFIN_IRQ_H_ */