5 comment "MMC/SD Card Drivers"
8 tristate "MMC block device driver"
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.
17 config MMC_BLOCK_BOUNCE
18 bool "Use bounce buffer for simple hosts"
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
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
33 If unsure, say Y here.