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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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2
Documentation/kernel-parameters.txt
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@ -526,7 +526,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
coherent_pool=nn[KMG] [ARM,KNL]
Sets the size of memory pool for coherent, atomic dma
allocations if Contiguous Memory Allocator (CMA) is used.
allocations, by default set to 256K.
code_bytes [X86] How many bytes of object code to print
in an oops report.