[ARM] 4073/1: Prevent s3c24xx drivers from including asm/arch/hardware.h and asm/arch/irqs.h

As reminded in http://lkml.org/lkml/2006/12/23/26, one should use
asm/hardware.h and asm/irq.h but absent-minded devs like me tends to use
asm/arch/hardware.h and/or asm/arch/irqs.h.
This patch aims at preventing such things.

In order to make it work, I had to modify asm-arm/irq.h too so that it can
be included from assembly files.
Also, as a side effect, I had to modify some headers who were using the
asm/arch/hardware.h or asm/arch/irqs.h.

Signed-off-by: Arnaud Patard <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

include/asm-arm/arch-s3c2410/dma.h

···
 #define __ASM_ARCH_DMA_H __FILE__
 
 #include <linux/sysdev.h>
-#include "hardware.h"
+#include <asm/hardware.h>
 
 /*
  * This is the maximum DMA address(physical address) that can be DMAd to.

include/asm-arm/arch-s3c2410/entry-macro.S

···
 #define INTOFFSET	(0x14)
 
 #include <asm/hardware.h>
-#include <asm/arch/irqs.h>
+#include <asm/irq.h>
 
 	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
 

include/asm-arm/arch-s3c2410/hardware.h

···
 #ifndef __ASM_ARCH_HARDWARE_H
 #define __ASM_ARCH_HARDWARE_H
 
+#ifndef __ASM_HARDWARE_H
+#error "Do not include this directly, instead #include <asm/hardware.h>"
+#endif
+
 #ifndef __ASSEMBLY__
 
 /* external functions for GPIO support

include/asm-arm/arch-s3c2410/irqs.h

···
 #ifndef __ASM_ARCH_IRQS_H
 #define __ASM_ARCH_IRQS_H __FILE__
 
+#ifndef __ASM_ARM_IRQ_H
+#error "Do not include this directly, instead #include <asm/irq.h>"
+#endif
 
 /* we keep the first set of CPU IRQs out of the range of
  * the ISA space, so that the PC104 has them to itself

include/asm-arm/irq.h

···
 #define NO_IRQ	((unsigned int)(-1))
 #endif
 
-struct irqaction;
 
 /*
  * Migration helpers
···
 #define IRQT_HIGH	(__IRQT_HIGHLVL)
 #define IRQT_PROBE	IRQ_TYPE_PROBE
 
+#ifndef __ASSEMBLY__
+struct irqaction;
 extern void migrate_irqs(void);
+#endif
+
 #endif