[PATCH 4.17 063/324] arm64: dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag

4.17-stable review patch. If anyone has any objections, please let me know. -- From: Marek Szyprowski [ Upstream commit dd65a941f6ba473a5cb9d013d57fa43b48450a04 ] dma_alloc_*() buffers might be exposed to userspace via mmap() call, so they should be cleared on allocation. In

[PATCH 4.17 063/324] arm64: dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag

4.17-stable review patch. If anyone has any objections, please let me know. -- From: Marek Szyprowski [ Upstream commit dd65a941f6ba473a5cb9d013d57fa43b48450a04 ] dma_alloc_*() buffers might be exposed to userspace via mmap() call, so they should be cleared on allocation. In