[PATCH 03/15] ARM: provide runtime hook for ioremap

We have compile time over-ride of ioremap, but an run-time override is
needed for multi-platform builds.

Signed-off-by: Rob Herring <redacted>
---
 arch/arm/include/asm/io.h |    5 ++++-
 arch/arm/mm/ioremap.c     |    3 +++
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 9275828..f5c6968 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h

@@ -264,8 +264,11 @@ extern void _memset_io(volatile void __iomem *, int, size_t);
  * Documentation/io-mapping.txt.
  *
  */
+
+extern void __iomem * (*arch_ioremap)(unsigned long, size_t, unsigned int);
+
 #ifndef __arch_ioremap
-#define __arch_ioremap			__arm_ioremap
+#define __arch_ioremap			arch_ioremap
 #define __arch_iounmap			__iounmap
 #endif
 

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 80632e8..f551c13 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c

@@ -314,6 +314,9 @@ __arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
 }
 EXPORT_SYMBOL(__arm_ioremap);
 
+void __iomem * (*arch_ioremap)(unsigned long , size_t , unsigned int ) = __arm_ioremap;
+EXPORT_SYMBOL(arch_ioremap);
+
 /*
  * Remap an arbitrary physical address space into the kernel virtual
  * address space as memory. Needed when the kernel wants to execute