MAX_CMA_AREAS is used by other subsystems (i.e. arch/arm/mm/dma-mapping.c), so we need to provide correct definition even if CMA is disabled. This patch fixes this issue. Reported-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> --- include/linux/cma.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/cma.h b/include/linux/cma.h index 9a18a2b1934c..c077635cad76 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -5,7 +5,11 @@ * There is always at least global CMA area and a few optional * areas configured in kernel .config. */ +#ifdef CONFIG_CMA #define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS) +#else +#define MAX_CMA_AREAS (0) +#endif struct cma; -- 1.9.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>