[PATCH] ARM: irq: add a mach/fiq.h inclusion for SPARSE_IRQ build

[Shawn Guo]

The commit a2be01b (ARM: only include mach/irqs.h for !SPARSE_IRQ)
makes mach/irqs.h only be included for !SPARSE_IRQ build.  There are
a nubmer of platforms have FIQ_START defined in mach/irqs.h.

  arch/arm/mach-at91/include/mach/irqs.h:#define FIQ_START AT91_ID_FIQ
  arch/arm/mach-rpc/include/mach/irqs.h:#define FIQ_START         64
  arch/arm/mach-s3c24xx/include/mach/irqs.h:#define FIQ_START             IRQ_EINT0
  arch/arm/plat-mxc/include/mach/irqs.h:#define FIQ_START 0
  arch/arm/plat-omap/include/plat/irqs.h:#define FIQ_START                1024

If SPARSE_IRQ is enabled for any of these platforms, the following
compile error will be seen.

  arch/arm/kernel/fiq.c: In function ‘enable_fiq’:
  arch/arm/kernel/fiq.c:127:19: error: ‘FIQ_START’ undeclared (first use in this function)
  arch/arm/kernel/fiq.c:127:19: note: each undeclared identifier is reported only once for each function it appears in
  arch/arm/kernel/fiq.c: In function ‘disable_fiq’:
  arch/arm/kernel/fiq.c:132:20: error: ‘FIQ_START’ undeclared (first use in this function)

So before we can remove the reference to FIQ_START in fiq.c, we need
a way out.  The patch adds a mach/fiq.h inclusion for SPARSE_IRQ build
in asm/irq.h, so that platform can have a chance to provide FIQ_START.

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
 arch/arm/include/asm/irq.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/arm/include/asm/irq.h b/arch/arm/include/asm/irq.h
index 35c21c3..3fa390d 100644
--- a/arch/arm/include/asm/irq.h
+++ b/arch/arm/include/asm/irq.h
@@ -7,6 +7,7 @@
 #include <mach/irqs.h>
 #else
 #define NR_IRQS NR_IRQS_LEGACY
+#include <mach/fiq.h>
 #endif
 
 #ifndef irq_canonicalize
-- 
1.7.5.4