Commit a3215902 authored by Jarkko Lavinen's avatar Jarkko Lavinen Committed by David Woodhouse
Browse files

mtd: Add mtdswap block driver 



Add a driver for allowing an mtd device to be used as a block device for
swapping. The block device is volatile, and the mapping of swapped pages
is not stored on flash.

Signed-off-by: default avatarJarkko Lavinen <jarkko.lavinen@nokia.com>
Tested-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 115ee88c

drivers/mtd/Kconfig

+18 −0
Original line number Diff line number Diff line
@@ -325,6 +325,24 @@ config MTD_OOPS 
	  To use, add console=ttyMTDx to the kernel command line,

	  where x is the MTD device number to use.



config MTD_SWAP

	tristate "Swap on MTD device support"

	depends on MTD && SWAP

	select MTD_BLKDEVS

	help

	  Provides volatile block device driver on top of mtd partition

          suitable for swapping.  The mapping of written blocks is not saved.

	  The driver provides wear leveling by storing erase counter into the

	  OOB.



config MTD_SWAP_STRICT

       bool "Strict erase error handling"

       depends on MTD_SWAP

       help

	 Enables strict tolerance on failed erasures, marking erase blocks bad

	 right after the first failed operation. With non-strict mode the

	 erase operation is retried.



source "drivers/mtd/chips/Kconfig"



source "drivers/mtd/maps/Kconfig"

drivers/mtd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ obj-$(CONFIG_RFD_FTL) += rfd_ftl.o 
obj-$(CONFIG_SSFDC)		+= ssfdc.o

obj-$(CONFIG_SM_FTL)		+= sm_ftl.o

obj-$(CONFIG_MTD_OOPS)		+= mtdoops.o

obj-$(CONFIG_MTD_SWAP)		+= mtdswap.o



nftl-objs		:= nftlcore.o nftlmount.o

inftl-objs		:= inftlcore.o inftlmount.o

drivers/mtd/mtdswap.c

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+1593 −0

File added.

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