new_dma_reserve 2209 include/linux/mm.h extern void set_dma_reserve(unsigned long new_dma_reserve); new_dma_reserve 7599 mm/page_alloc.c void __init set_dma_reserve(unsigned long new_dma_reserve) new_dma_reserve 7601 mm/page_alloc.c dma_reserve = new_dma_reserve;