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    Subject[PATCH 22/22 take 3] UBI: Linux build integration
    diff -auNrp tmp-from/drivers/mtd/Kconfig tmp-to/drivers/mtd/Kconfig
    --- tmp-from/drivers/mtd/Kconfig 2007-03-14 17:15:49.000000000 +0200
    +++ tmp-to/drivers/mtd/Kconfig 2007-03-14 17:15:49.000000000 +0200
    @@ -292,5 +292,7 @@ source "drivers/mtd/nand/Kconfig"

    source "drivers/mtd/onenand/Kconfig"

    +source "drivers/mtd/ubi/Kconfig"
    +
    endmenu

    diff -auNrp tmp-from/drivers/mtd/Makefile tmp-to/drivers/mtd/Makefile
    --- tmp-from/drivers/mtd/Makefile 2007-03-14 17:15:49.000000000 +0200
    +++ tmp-to/drivers/mtd/Makefile 2007-03-14 17:15:49.000000000 +0200
    @@ -28,3 +28,5 @@ nftl-objs := nftlcore.o nftlmount.o
    inftl-objs := inftlcore.o inftlmount.o

    obj-y += chips/ maps/ devices/ nand/ onenand/
    +
    +obj-$(CONFIG_MTD_UBI) += ubi/
    diff -auNrp tmp-from/drivers/mtd/ubi/Kconfig tmp-to/drivers/mtd/ubi/Kconfig
    --- tmp-from/drivers/mtd/ubi/Kconfig 1970-01-01 02:00:00.000000000 +0200
    +++ tmp-to/drivers/mtd/ubi/Kconfig 2007-03-14 17:15:49.000000000 +0200
    @@ -0,0 +1,60 @@
    +# drivers/mtd/ubi/Kconfig
    +
    +menu "UBI - Unsorted block images"
    + depends on MTD
    +
    +config MTD_UBI
    + tristate "Enable UBI"
    + depends on MTD
    + select CRC32
    + help
    + UBI is a software layer above MTD layer which admits of LVM-like
    + logical volumes on top of MTD devices, hides some complexities of
    + flash chips like wear and bad blocks and provides some other useful
    + capabilities. Please, consult the MTD web site for more details
    + (www.linux-mtd.infradead.org).
    +
    +config MTD_UBI_WL_THRESHOLD
    + int "UBI wear-leveling threshold"
    + default 4096
    + range 2 65536
    + depends on MTD_UBI
    + help
    + This parameter defines the maximum difference between the highest
    + erase counter value and the lowest erase counter value of eraseblocks
    + of UBI devices. When this threshold is exceeded, UBI starts performing
    + wear leveling by means of moving data from eraseblock with low erase
    + counter to eraseblocks with high erase counter. Leave the default
    + value if unsure.
    +
    +config MTD_UBI_BEB_RESERVE
    + int "Percentage of reserved eraseblocks for bad eraseblocks handling"
    + default 1
    + range 0 25
    + depends on MTD_UBI
    + help
    + If the MTD device admits of bad eraseblocks (e.g. NAND flash), UBI
    + reserves some amount of physical eraseblocks to handle new bad
    + eraseblocks. For example, if a flash physical eraseblock becomes bad,
    + UBI uses these reserved physical eraseblocks to relocate the bad one.
    + This option specifies how many physical eraseblocks will be reserved
    + for bad eraseblock handling (percents of total number of good flash
    + eraseblocks). If the underlying flash does not admit of bad
    + eraseblocks (e.g. NOR flash), this value is ignored and nothing is
    + reserved. Leave the default value if unsure.
    +
    +config MTD_UBI_GLUEBI
    + bool "Emulate MTD devices"
    + default n
    + depends on MTD_UBI
    + help
    + This option enables MTD devices emulation on top of UBI volumes: for
    + each UBI volumes an MTD device is created, and all I/O to this MTD
    + device is redirected to the UBI volume. This is handy to make
    + MTD-oriented software (like JFFS2) work on top of UBI. Do not enable
    + this if no legacy software will be used.
    +
    +# There are a lot of debugging options, so they are moved to a distinct file
    +source "drivers/mtd/ubi/Kconfig.debug"
    +
    +endmenu
    diff -auNrp tmp-from/drivers/mtd/ubi/Kconfig.debug tmp-to/drivers/mtd/ubi/Kconfig.debug
    --- tmp-from/drivers/mtd/ubi/Kconfig.debug 1970-01-01 02:00:00.000000000 +0200
    +++ tmp-to/drivers/mtd/ubi/Kconfig.debug 2007-03-14 17:15:49.000000000 +0200
    @@ -0,0 +1,153 @@
    +# UBI debugging configuration options, part of drivers/mtd/ubi/Kconfig
    +
    +comment "UBI debugging options"
    + depends on MTD_UBI
    +
    +config MTD_UBI_DEBUG
    + bool "UBI debugging"
    + depends on SYSFS
    + depends on MTD_UBI
    + select DEBUG_FS
    + select KALLSYMS_ALL
    + help
    + This enables UBI debugging support: enables various assertions in the
    + code, verbose debugging messages and allows to switch many other
    + debugging features on. UBI exposes its debugging stuff via the Linux
    + debugfs virtual file-system under the "ubi" directory. Mount debugfs
    + to access this stuff: mount -t debugfs none <mount_point>
    +
    +config MTD_UBI_DEBUG_DISABLE_BGT
    + bool "Do not enable the UBI background thread"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option switches the background thread off by default. The thread
    + may be also be enabled/disabled via UBI sysfs.
    +
    +config MTD_UBI_DEBUG_USERSPACE_IO
    + bool "Direct user-space write/erase support"
    + default n
    + depends on MTD_UBI
    + help
    + By default, users cannot directly write and erase individual
    + eraseblocks of dynamic volumes, and have to use update operation
    + instead. This option enables this capability - it is very useful for
    + debugging and testing.
    +
    +config MTD_UBI_DEBUG_EMULATE_BITFLIPS
    + bool "Emulate flash bit-flips"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option emulates bit-flips with probability 1/50, which in turn
    + causes scrubbing. Useful for debugging and stressing UBI.
    +
    +config MTD_UBI_DEBUG_EMULATE_WRITE_FAILURES
    + bool "Emulate flash write failures"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option emulates write failures with probability 1/100. Useful for
    + debugging and testing how UBI handlines errors.
    +
    +config MTD_UBI_DEBUG_EMULATE_ERASE_FAILURES
    + bool "Emulate flash erase failures"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option emulates erase failures with probability 1/100. Useful for
    + debugging and testing how UBI handlines errors.
    +
    +menu "UBI debugging messages"
    + depends on MTD_UBI_DEBUG
    +
    +config MTD_UBI_DEBUG_MSG_UIF
    + bool "User interface unit messages"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option enables debugging messages from the UBI user interfaces
    + unit.
    +
    +config MTD_UBI_DEBUG_MSG_VTBL
    + bool "Volume table unit messages"
    + default n
    + depends on MTD_UBI_DEBUG
    + help
    + This option enables debugging messages from the UBI volume table
    + unit.
    +
    +config MTD_UBI_DEBUG_MSG_EBA
    + bool "Eraseblock association unit messages"
    + default n
    + depends on MTD_UBI_DEBUG
    + help
    + This option enables debugging messages from the UBI eraseblock
    + association unit.
    +
    +config MTD_UBI_DEBUG_MSG_WL
    + bool "Wear-leveling unit messages"
    + default n
    + depends on MTD_UBI_DEBUG
    + help
    + This option enables debugging messages from the UBI wear-leveling
    + unit.
    +
    +config MTD_UBI_DEBUG_MSG_IO
    + bool "Input/output unit messages"
    + default n
    + depends on MTD_UBI_DEBUG
    + help
    + This option enables debugging messages from the UBI input/output unit.
    +
    +config MTD_UBI_DEBUG_MSG_BLD
    + bool "UBI build messages"
    + default n
    + depends on MTD_UBI_DEBUG
    + help
    + This option enables UBI build debugging messages
    +
    +endmenu # UBI debugging messages
    +
    +menu "UBI paranoid checks"
    + depends on MTD_UBI_DEBUG
    +
    +config MTD_UBI_DEBUG_PARANOID_VTBL
    + bool "Paranoid checks in the volume table unit"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option enables extra self-checks in the volume table unit.
    +
    +config MTD_UBI_DEBUG_PARANOID_EBA
    + bool "Paranoid checks in the eraseblock association unit"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option enables extra self-checks in the eraseblock association
    + unit.
    +
    +config MTD_UBI_DEBUG_PARANOID_WL
    + bool "Paranoid checks in the wear-leveling unit"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option enables extra self-checks in the wear-leveling unit.
    +
    +config MTD_UBI_DEBUG_PARANOID_IO
    + bool "Paranoid checks in the input/output unit"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option enables extra self-checks in the input/output unit.
    + Warning, this is rather heavy-weight and will slow UBI down.
    +
    +config MTD_UBI_DEBUG_PARANOID_SCAN
    + bool "Paranoid checks in the scanning unit"
    + depends on MTD_UBI_DEBUG
    + default n
    + help
    + This option enables extra self-checks in the scanning unit. Warning,
    + this is rather heavy-weight and will slow UBI down.
    +
    +endmenu # UBI paranoid checks
    diff -auNrp tmp-from/drivers/mtd/ubi/Makefile tmp-to/drivers/mtd/ubi/Makefile
    --- tmp-from/drivers/mtd/ubi/Makefile 1970-01-01 02:00:00.000000000 +0200
    +++ tmp-to/drivers/mtd/ubi/Makefile 2007-03-14 17:15:49.000000000 +0200
    @@ -0,0 +1,7 @@
    +obj-$(CONFIG_MTD_UBI) += ubi.o
    +
    +ubi-y += upd.o sysfs.o cdev.o uif.o vtbl.o vmt.o eba.o io.o wl.o scan.o build.o
    +ubi-y += account.o misc.o
    +
    +ubi-$(CONFIG_MTD_UBI_DEBUG) += debug.o
    +ubi-$(CONFIG_MTD_UBI_GLUEBI) += gluebi.o
    diff -auNrp tmp-from/include/mtd/Kbuild tmp-to/include/mtd/Kbuild
    --- tmp-from/include/mtd/Kbuild 2007-03-14 17:15:49.000000000 +0200
    +++ tmp-to/include/mtd/Kbuild 2007-03-14 17:15:49.000000000 +0200
    @@ -3,3 +3,5 @@ header-y += jffs2-user.h
    header-y += mtd-abi.h
    header-y += mtd-user.h
    header-y += nftl-user.h
    +header-y += ubi-header.h
    +header-y += ubi-user.h
    -
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