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authorChristoph Lameter <clameter@sgi.com>2007-02-10 01:43:11 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 10:51:18 -0800
commit09ae1f585e9def652cdb1d0484611d4f4dc2d5fd (patch)
treed759e739ae0a8ba72f20938d5ac8c19dac76acba
parent4b51d66989218aad731a721b5b28c79bf5388c09 (diff)
downloadlinux-2.6.34-ux500-09ae1f585e9def652cdb1d0484611d4f4dc2d5fd.tar.gz
[PATCH] optional ZONE_DMA: optional ZONE_DMA for ia64
ZONE_DMA less operation for IA64 SGI platform Disable ZONE_DMA for SGI SN2. All memory is addressable by all devices and we do not need any special memory pool. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/ia64/Kconfig4
-rw-r--r--arch/ia64/mm/contig.c4
-rw-r--r--arch/ia64/mm/discontig.c6
3 files changed, 11 insertions, 3 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 549ead59793..db185f34e34 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -25,8 +25,8 @@ config 64BIT
default y
config ZONE_DMA
- bool
- default y
+ def_bool y
+ depends on !IA64_SGI_SN2
config MMU
bool
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 63e6d49c581..ca4d41e5f17 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -259,9 +259,11 @@ paging_init (void)
num_physpages = 0;
efi_memmap_walk(count_pages, &num_physpages);
- max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+#ifdef CONFIG_ZONE_DMA
+ max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_DMA] = max_dma;
+#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_VIRTUAL_MEM_MAP
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 6eae596c509..16835108bb5 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -37,7 +37,9 @@ struct early_node_data {
unsigned long pernode_size;
struct bootmem_data bootmem_data;
unsigned long num_physpages;
+#ifdef CONFIG_ZONE_DMA
unsigned long num_dma_physpages;
+#endif
unsigned long min_pfn;
unsigned long max_pfn;
};
@@ -633,9 +635,11 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n
unsigned long end = start + len;
mem_data[node].num_physpages += len >> PAGE_SHIFT;
+#ifdef CONFIG_ZONE_DMA
if (start <= __pa(MAX_DMA_ADDRESS))
mem_data[node].num_dma_physpages +=
(min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT;
+#endif
start = GRANULEROUNDDOWN(start);
start = ORDERROUNDDOWN(start);
end = GRANULEROUNDUP(end);
@@ -688,7 +692,9 @@ void __init paging_init(void)
}
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] = max_dma;
+#endif
max_zone_pfns[ZONE_NORMAL] = max_pfn;
free_area_init_nodes(max_zone_pfns);