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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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
403f8af323