From: Arnd Bergmann <[email protected]>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit dd94d3558947756b102b1487911acd925224a38c upstream.

Commit b713aa0b15 "ARM: fix asm/memory.h build error" broke some
configurations on mach-realview with sparsemem enabled, which
is missing a definition of PHYS_OFFSET:

arch/arm/include/asm/memory.h:268:42: error: 'PHYS_OFFSET' undeclared (first 
use in this function)
 #define PHYS_PFN_OFFSET ((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
arch/arm/include/asm/dma-mapping.h:104:9: note: in expansion of macro 
'PHYS_PFN_OFFSET'
  return PHYS_PFN_OFFSET + dma_to_pfn(dev, *dev->dma_mask);

An easy workaround is for realview to define PHYS_OFFSET itself,
in the same way we define it for platforms that don't have a private
__virt_to_phys function.

Signed-off-by: Arnd Bergmann <[email protected]>
Cc: Russell King <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Guenter Roeck <[email protected]>
Signed-off-by: Jiri Slaby <[email protected]>
---
 arch/arm/mach-realview/include/mach/memory.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-realview/include/mach/memory.h 
b/arch/arm/mach-realview/include/mach/memory.h
index 2022e092f0ca..db09170e3832 100644
--- a/arch/arm/mach-realview/include/mach/memory.h
+++ b/arch/arm/mach-realview/include/mach/memory.h
@@ -56,6 +56,8 @@
 #define PAGE_OFFSET1   (PAGE_OFFSET + 0x10000000)
 #define PAGE_OFFSET2   (PAGE_OFFSET + 0x30000000)
 
+#define PHYS_OFFSET PLAT_PHYS_OFFSET
+
 #define __phys_to_virt(phys)                                           \
        ((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 :    \
         (phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 :    \
-- 
2.5.0

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