Move dmapool.c to mm/ directory

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index b39ea3f..ed0a722 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -5,7 +5,7 @@
 			   cpu.o firmware.o init.o map.o devres.o \
 			   attribute_container.o transport_class.o
 obj-y			+= power/
-obj-$(CONFIG_HAS_DMA)	+= dma-mapping.o dmapool.o
+obj-$(CONFIG_HAS_DMA)	+= dma-mapping.o
 obj-$(CONFIG_ISA)	+= isa.o
 obj-$(CONFIG_FW_LOADER)	+= firmware_class.o
 obj-$(CONFIG_NUMA)	+= node.o
diff --git a/mm/Makefile b/mm/Makefile
index 5c0b0ea..e222cc5 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -15,6 +15,7 @@
 
 obj-$(CONFIG_BOUNCE)	+= bounce.o
 obj-$(CONFIG_SWAP)	+= page_io.o swap_state.o swapfile.o thrash.o
+obj-$(CONFIG_HAS_DMA)	+= dmapool.o
 obj-$(CONFIG_HUGETLBFS)	+= hugetlb.o
 obj-$(CONFIG_NUMA) 	+= mempolicy.o
 obj-$(CONFIG_SPARSEMEM)	+= sparse.o
diff --git a/drivers/base/dmapool.c b/mm/dmapool.c
similarity index 100%
rename from drivers/base/dmapool.c
rename to mm/dmapool.c