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ARM: dma-mapping: remove custom consistent dma region

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This patch changes dma-mapping subsystem to use generic vmalloc areas
for all consistent dma allocations. This increases the total size limit
of the consistent allocations and removes platform hacks and a lot of
duplicated code.

Atomic allocations are served from special pool preallocated on boot,
because vmalloc areas cannot be reliably created in atomic context.

Signed-off-by: Marek Szyprowski <[email protected]>
Reviewed-by: Kyungmin Park <[email protected]>
Reviewed-by: Minchan Kim <[email protected]>
This commit is contained in:
Marek Szyprowski 2012-07-30 09:11:33 +02:00
commit e9da6e9905
6 changed files with 181 additions and 323 deletions
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10
mm/vmalloc.c
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@ -1403,7 +1403,15 @@ struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
-1, GFP_KERNEL, caller);
}
static struct vm_struct *find_vm_area(const void *addr)
/**
* find_vm_area - find a continuous kernel virtual area
* @addr: base address
*
* Search for the kernel VM area starting at @addr, and return it.
* It is up to the caller to do all required locking to keep the returned
* pointer valid.
*/
struct vm_struct *find_vm_area(const void *addr)
{
struct vmap_area *va;