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authorHeiko Carstens <heiko.carstens@de.ibm.com>2006-09-25 23:31:33 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 08:48:49 -0700
commitdfd54cbcc0b834652389ce99b5e656ea5f44a3c1 (patch)
tree7c403a50b42b2809bb9b18122cbd83e8e2c180c9 /mm/bootmem.c
parentb72f160443cb78b2f8addae6e331d2adaa70f869 (diff)
downloadlinux-dfd54cbcc0b834652389ce99b5e656ea5f44a3c1.tar.bz2
[PATCH] bootmem: use MAX_DMA_ADDRESS instead of LOW32LIMIT
Introduce ARCH_LOW_ADDRESS_LIMIT which can be set per architecture to override the 4GB default limit used by the bootmem allocater within __alloc_bootmem_low() and __alloc_bootmem_low_node(). E.g. s390 needs a 2GB limit instead of 4GB. Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index f0f85fa713ca..d53112fcb404 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -15,6 +15,7 @@
#include <asm/bug.h>
#include <asm/io.h>
+#include <asm/processor.h>
#include "internal.h"
@@ -453,7 +454,9 @@ void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
return __alloc_bootmem(size, align, goal);
}
-#define LOW32LIMIT 0xffffffff
+#ifndef ARCH_LOW_ADDRESS_LIMIT
+#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
+#endif
void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
unsigned long goal)
@@ -462,7 +465,8 @@ void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
void *ptr;
list_for_each_entry(bdata, &bdata_list, list) {
- ptr = __alloc_bootmem_core(bdata, size, align, goal, LOW32LIMIT);
+ ptr = __alloc_bootmem_core(bdata, size, align, goal,
+ ARCH_LOW_ADDRESS_LIMIT);
if (ptr)
return ptr;
}
@@ -478,5 +482,6 @@ void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{
- return __alloc_bootmem_core(pgdat->bdata, size, align, goal, LOW32LIMIT);
+ return __alloc_bootmem_core(pgdat->bdata, size, align, goal,
+ ARCH_LOW_ADDRESS_LIMIT);
}