ION need HAS_DMA (e.g. need DMA_SHARED_BUFFER), so it has to depend on HAS_DMA, or can not pass compiling with allmodconfig under score which NO_DMA. And the related error: CC drivers/staging/android/ion/ion_cma_heap.o drivers/staging/android/ion/ion_cma_heap.c: In function 'ion_cma_mmap': drivers/staging/android/ion/ion_cma_heap.c:168:2: error: implicit declaration of function 'dma_mmap_coherent' [-Werror=implicit-function-declaration] return dma_mmap_coherent(dev, vma, info->cpu_addr, info->handle, ^ cc1: some warnings being treated as errors make[4]: *** [drivers/staging/android/ion/ion_cma_heap.o] Error 1 make[3]: *** [drivers/staging/android/ion] Error 2 make[2]: *** [drivers/staging/android] Error 2 make[1]: *** [drivers/staging] Error 2 make: *** [drivers] Error 2 Signed-off-by: Chen Gang <gang.chen.5i5j@xxxxxxxxx> --- drivers/staging/android/ion/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/android/ion/Kconfig b/drivers/staging/android/ion/Kconfig index 0f8fec1..0a6e4d0 100644 --- a/drivers/staging/android/ion/Kconfig +++ b/drivers/staging/android/ion/Kconfig @@ -1,6 +1,6 @@ menuconfig ION bool "Ion Memory Manager" - depends on HAVE_MEMBLOCK + depends on HAVE_MEMBLOCK && HAS_DMA select GENERIC_ALLOCATOR select DMA_SHARED_BUFFER ---help--- -- 1.9.2.459.g68773ac _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel