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[PATCH] optional ZONE_DMA: remove ZONE_DMA remains from sh/sh64

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sh / sh64: Remove ZONE_DMA remains.

Both arches do not need ZONE_DMA

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Christoph Lameter <clameter@sgi.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 01:43:13 -08:00
committed by Linus Torvalds
parent 005928374b
commit 339ba9b15d
3 changed files with 2 additions and 23 deletions
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17
arch/sh/mm/init.c
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@@ -158,7 +158,6 @@ void __init paging_init(void)
* Setup some defaults for the zone sizes.. these should be safe
* regardless of distcontiguous memory or MMU settings.
*/
zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
#ifdef CONFIG_HIGHMEM
zones_size[ZONE_HIGHMEM] = 0 >> PAGE_SHIFT;
@@ -170,8 +169,6 @@ void __init paging_init(void)
* the zone sizes accordingly, in addition to turning it on.
*/
{
unsigned long max_dma, low, start_pfn;
/* We don't need to map the kernel through the TLB, as
* it is permanatly mapped using P1. So clear the
* entire pgd. */
@@ -179,19 +176,7 @@ void __init paging_init(void)
/* Turn on the MMU */
enable_mmu();
/* Fixup the zone sizes */
start_pfn = START_PFN;
max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
low = MAX_LOW_PFN;
if (low < max_dma) {
zones_size[ZONE_DMA] = low - start_pfn;
zones_size[ZONE_NORMAL] = 0;
} else {
zones_size[ZONE_DMA] = max_dma - start_pfn;
zones_size[ZONE_NORMAL] = low - max_dma;
}
zones_size[ZONE_NORMAL] = MAX_LOW_PFN - START_PFN;
}
/* Set an initial value for the MMU.TTB so we don't have to