ARM: use ARM_DMA_ZONE_SIZE to adjust the zone sizes

Rather than each platform providing its own function to adjust the
zone sizes, use the new ARM_DMA_ZONE_SIZE definition to perform this
adjustment.  This ensures that the actual DMA zone size and the
ISA_DMA_THRESHOLD/MAX_DMA_ADDRESS definitions are consistent with
each other, and moves this complexity out of the platform code.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 1 insertions, 24 deletions

diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 75dbc8791d0..525ad17f826 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -56,25 +56,6 @@
 
 #include "core.h"
 
-#ifdef CONFIG_ZONE_DMA
-/*
- * Adjust the zones if there are restrictions for DMA access.
- */
-void __init realview_adjust_zones(unsigned long *size, unsigned long *hole)
-{
-        unsigned long dma_size = SZ_256M >> PAGE_SHIFT;
-
-        if (!machine_is_realview_pbx() || size[0] <= dma_size)
-                return;
-
-        size[ZONE_NORMAL] = size[0] - dma_size;
-        size[ZONE_DMA] = dma_size;
-        hole[ZONE_NORMAL] = hole[0];
-        hole[ZONE_DMA] = 0;
-}
-#endif
-
-
 #define REALVIEW_FLASHCTRL    (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
 
 static int realview_flash_init(void)
diff --git a/arch/arm/mach-realview/include/mach/memory.h b/arch/arm/mach-realview/include/mach/memory.h
index 973428d3f7c..1759fa673ee 100644
--- a/arch/arm/mach-realview/include/mach/memory.h
+++ b/arch/arm/mach-realview/include/mach/memory.h
@@ -29,11 +29,7 @@
 #define PLAT_PHYS_OFFSET                UL(0x00000000)
 #endif
 
-#if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA)
-extern void realview_adjust_zones(unsigned long *size, unsigned long *hole);
-#define arch_adjust_zones(size, hole) \
-        realview_adjust_zones(size, hole)
-
+#ifdef CONFIG_ZONE_DMA
 #define ARM_DMA_ZONE_SIZE       SZ_256M
 #endif