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authorNicolas Pitre <nico@cam.org>2008-10-07 20:14:55 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-10-09 21:29:46 +0100
commit3bca103a1e658d23737d20e1989139d9ca8973bf (patch)
tree672dcfde5a28cd0b2c4b06521f65413eab49750a /arch/arm/include
parent000b50259271c9c14f6e175795f5164e1d51d35b (diff)
[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>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/memory.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 7834adbe177..809ff9ab853 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
/*