Kconfig revision 98ccf14909ba02a41c5925b0b2c92aeeef23d3b9 
1#
2# MMC/SD card drivers
3#
4
5comment "MMC/SD Card Drivers"
6
7config MMC_BLOCK
8	tristate "MMC block device driver"
9	depends on BLOCK
10	default y
11	help
12	  Say Y here to enable the MMC block device driver support.
13	  This provides a block device driver, which you can use to
14	  mount the filesystem. Almost everyone wishing MMC support
15	  should say Y or M here.
16
17config MMC_BLOCK_BOUNCE
18	bool "Use bounce buffer for simple hosts"
19	depends on MMC_BLOCK
20	default y
21	help
22	  SD/MMC is a high latency protocol where it is crucial to
23	  send large requests in order to get high performance. Many
24	  controllers, however, are restricted to continuous memory
25	  (i.e. they can't do scatter-gather), something the kernel
26	  rarely can provide.
27
28	  Say Y here to help these restricted hosts by bouncing
29	  requests back and forth from a large buffer. You will get
30	  a big performance gain at the cost of up to 64 KiB of
31	  physical memory.
32
33	  If unsure, say Y here.
34
35