Certain platforms contain peripherals which have contiguous memory alignment requirements, necessitating the use of the alignment argument when obtaining CMA memory. The current default maximum CMA_ALIGNMENT of order 9 translates into a 1MB alignment on systems with a 4K page size. To accommodate systems with peripherals with even larger alignment requirements, increase the upper-bound of CMA_ALIGNMENT from order 9 to order 12.
Marc Carino (1): cma: increase CMA_ALIGNMENT upper limit to 12
drivers/base/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)