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-rw-r--r--drivers/block/Kconfig13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 014a1cfc41c5..1b8094d4d7af 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -393,14 +393,15 @@ config BLK_DEV_RAM_SIZE
The default value is 4096 kilobytes. Only change this if you know
what you are doing.
-config BLK_DEV_XIP
- bool "Support XIP filesystems on RAM block device"
- depends on BLK_DEV_RAM
+config BLK_DEV_RAM_DAX
+ bool "Support Direct Access (DAX) to RAM block devices"
+ depends on BLK_DEV_RAM && FS_DAX
default n
help
- Support XIP filesystems (such as ext2 with XIP support on) on
- top of block ram device. This will slightly enlarge the kernel, and
- will prevent RAM block device backing store memory from being
+ Support filesystems using DAX to access RAM block devices. This
+ avoids double-buffering data in the page cache before copying it
+ to the block device. Answering Y will slightly enlarge the kernel,
+ and will prevent RAM block device backing store memory from being
allocated from highmem (only a problem for highmem systems).
config CDROM_PKTCDVD