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cma: increase CMA_ALIGNMENT upper limit to 12

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Some systems require a larger maximum PAGE_SIZE order for CMA allocations.
 To accommodate such systems, increase the upper-bound of the
CMA_ALIGNMENT range to 12 (which ends up being 16MB on systems with 4K
pages).

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marc Carino 2014-06-04 16:10:01 -07:00 committed by Linus Torvalds
parent 18ab4d4ced
commit fe54b1fd49
1 changed files with 1 additions and 1 deletions
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drivers/base/Kconfig
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@ -258,7 +258,7 @@ endchoice
config CMA_ALIGNMENT config CMA_ALIGNMENT
int "Maximum PAGE_SIZE order of alignment for contiguous buffers" int "Maximum PAGE_SIZE order of alignment for contiguous buffers"
range 4 9 range 4 12
default 8 default 8
help help
DMA mapping framework by default aligns all buffers to the smallest DMA mapping framework by default aligns all buffers to the smallest