Commit fe54b1fd authored Jun 04, 2014 by Marc Carino Committed by Linus Torvalds Jun 04, 2014

cma: increase CMA_ALIGNMENT upper limit to 12



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>

parent 18ab4d4c

drivers/base/Kconfig

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -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

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