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[PATCH] reduce MAX_NR_ZONES: make ZONE_DMA32 optional

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Make ZONE_DMA32 optional

- Add #ifdefs around ZONE_DMA32 specific code and definitions.

- Add CONFIG_ZONE_DMA32 config option and use that for x86_64
  that alone needs this zone.

- Remove the use of CONFIG_DMA_IS_DMA32 and CONFIG_DMA_IS_NORMAL
  for ia64 and fix up the way per node ZVCs are calculated.

- Fall back to prior GFP_ZONEMASK of 0x03 if there is no
  DMA32 zone.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter 2006-09-25 23:31:13 -07:00 • committed by Linus Torvalds
commit fb0e7942bd
6 changed files with 25 additions and 16 deletions
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4
include/linux/vmstat.h
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@ -124,12 +124,10 @@ static inline unsigned long node_page_state(int node,
struct zone *zones = NODE_DATA(node)->node_zones;
return
#ifndef CONFIG_DMA_IS_NORMAL
#if !defined(CONFIG_DMA_IS_DMA32) && BITS_PER_LONG >= 64
#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], item) +
#endif
zone_page_state(&zones[ZONE_NORMAL], item) +
#endif
#ifdef CONFIG_HIGHMEM
zone_page_state(&zones[ZONE_HIGHMEM], item) +
#endif