scatterlist: move the NEED_SG_DMA_LENGTH config symbol to lib/Kconfig
This way we have one central definition of it, and user can select it as
needed.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 3ff735a..8e6a67e 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -10,6 +10,7 @@
select HAVE_OPROFILE
select HAVE_PCSPKR_PLATFORM
select HAVE_PERF_EVENTS
+ select NEED_SG_DMA_LENGTH
select VIRT_TO_BUS
select GENERIC_IRQ_PROBE
select AUTO_IRQ_AFFINITY if SMP
@@ -70,9 +71,6 @@
config NEED_DMA_MAP_STATE
def_bool y
-config NEED_SG_DMA_LENGTH
- def_bool y
-
config GENERIC_ISA_DMA
bool
default y
