[ARM] 5295/1: make ZONE_DMA optional
Most ARM machines don't need a special "DMA" memory zone, and
when configured out, the kernel becomes a bit smaller:
| text data bss dec hex filename
|3826182 102384 111700 4040266 3da64a vmlinux
|3823593 101616 111700 4036909 3d992d vmlinux.nodmazone
This is because the system now has only one zone total which effect is
to optimize away many conditionals in page allocation paths.
So let's configure this zone only on machines that need split zones.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f5bf38b5..ea52fae 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -148,7 +148,6 @@
config ZONE_DMA
bool
- default y
config GENERIC_ISA_DMA
bool
@@ -357,6 +356,7 @@
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
+ select ZONE_DMA if PCI
help
Support for Intel's IXP4XX (XScale) family of processors.
@@ -503,6 +503,7 @@
bool "Shark"
select ISA
select ISA_DMA
+ select ZONE_DMA
select PCI
help
Support for the StrongARM based Digital DNARD machine, also known
@@ -524,6 +525,7 @@
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select HAVE_CLK
+ select ZONE_DMA
help
Support for TI's DaVinci platform.
diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 3e07346..2e32acc 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -12,7 +12,8 @@
config SA1111
bool
- select DMABOUNCE
+ select DMABOUNCE if !ARCH_PXA
+ select ZONE_DMA if !ARCH_PXA
config DMABOUNCE
bool
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 7834adb..809ff9a 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -137,6 +137,8 @@
#ifndef arch_adjust_zones
#define arch_adjust_zones(node,size,holes) do { } while (0)
+#elif !defined(CONFIG_ZONE_DMA)
+#error "custom arch_adjust_zones() requires CONFIG_ZONE_DMA"
#endif
/*
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index e8ee7ec..e484f609f 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -210,6 +210,7 @@
bool "CompuLab CM-X270 modules"
select PXA27x
select IWMMXT
+ select ZONE_DMA if PCI
config MACH_MAGICIAN
bool "Enable HTC Magician Support"