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[PATCH] optional ZONE_DMA: optional ZONE_DMA for ia64

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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>
This commit is contained in:
Christoph Lameter 2007-02-10 01:43:11 -08:00 committed by Linus Torvalds
parent 4b51d66989
commit 09ae1f585e
3 changed files with 11 additions and 3 deletions
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4
arch/ia64/Kconfig
View File

@ -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

4
arch/ia64/mm/contig.c
View File

@ -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

6
arch/ia64/mm/discontig.c
View File

@ -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);