Commit 3bca103a authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Russell King

[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: default avatarNicolas Pitre <nico@marvell.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 000b5025
......@@ -148,7 +148,6 @@ config ARCH_MAY_HAVE_PC_FDC
config ZONE_DMA
bool
default y
config GENERIC_ISA_DMA
bool
......@@ -357,6 +356,7 @@ config ARCH_IXP4XX
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 @@ config ARCH_SHARK
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 @@ config ARCH_DAVINCI
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select HAVE_CLK
select ZONE_DMA
help
Support for TI's DaVinci platform.
......
......@@ -12,7 +12,8 @@ config ICST307
config SA1111
bool
select DMABOUNCE
select DMABOUNCE if !ARCH_PXA
select ZONE_DMA if !ARCH_PXA
config DMABOUNCE
bool
......
......@@ -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
/*
......
......@@ -210,6 +210,7 @@ config MACH_ARMCORE
bool "CompuLab CM-X270 modules"
select PXA27x
select IWMMXT
select ZONE_DMA if PCI
config MACH_MAGICIAN
bool "Enable HTC Magician Support"
......
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