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[PATCH] x86-64: Fix vmalloc_32 to really allocate <4GB on 64bit platforms 

Ugly ifdef, but should handle all 64bit platforms that have suitable
zones. On some like Altix it's probably impossible without IOMMU
use to get memory <4GB this way,  but they have to live with that.
Signed-off-by: Andi Kleen <ak@suse.de>
hifive-unleashed-5.1
Andi Kleen 2007-05-02 19:27:12 +02:00 committed by Andi Kleen
parent bbf30a1650
commit 0d08e0d3a9
1 changed files with 11 additions and 3 deletions
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14
mm/vmalloc.c
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@ -431,7 +431,7 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
area->flags |= VM_VPAGES;
} else {
pages = kmalloc_node(array_size,
(gfp_mask & ~(__GFP_HIGHMEM | __GFP_ZERO)),
(gfp_mask & GFP_LEVEL_MASK),
node);
}
area->pages = pages;
@ -577,6 +577,14 @@ void *vmalloc_exec(unsigned long size)
return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL_EXEC);
}
#if defined(CONFIG_64BIT) && defined(CONFIG_ZONE_DMA32)
#define GFP_VMALLOC32 GFP_DMA32
#elif defined(CONFIG_64BIT) && defined(CONFIG_ZONE_DMA)
#define GFP_VMALLOC32 GFP_DMA
#else
#define GFP_VMALLOC32 GFP_KERNEL
#endif
/**
* vmalloc_32 - allocate virtually contiguous memory (32bit addressable)
* @size: allocation size
@ -586,7 +594,7 @@ void *vmalloc_exec(unsigned long size)
*/
void *vmalloc_32(unsigned long size)
{
return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL);
return __vmalloc(size, GFP_VMALLOC32, PAGE_KERNEL);
}
EXPORT_SYMBOL(vmalloc_32);
@ -602,7 +610,7 @@ void *vmalloc_32_user(unsigned long size)
struct vm_struct *area;
void *ret;
ret = __vmalloc(size, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
ret = __vmalloc(size, GFP_VMALLOC32 | __GFP_ZERO, PAGE_KERNEL);
if (ret) {
write_lock(&vmlist_lock);
area = __find_vm_area(ret);