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 <[email protected]> Cc: Marek Szyprowski <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
jix · Jun 4, 2014 · fe54b1f · fe54b1f
1 parent 18ab4d4
commit fe54b1f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
@@ -258,7 +258,7 @@ endchoice
 
 config CMA_ALIGNMENT
 	int "Maximum PAGE_SIZE order of alignment for contiguous buffers"
-	range 4 9
+	range 4 12
 	default 8
 	help
 	  DMA mapping framework by default aligns all buffers to the smallest