diff options
| author | Richard Weinberger <richard@nod.at> | 2012-09-26 17:51:50 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2013-02-22 09:51:34 +0200 |
| commit | 128140fa8ec1ab5178594cc7a3a82f2addc2af54 (patch) | |
| tree | 61293dd12bedd6d6a0394bb7963336fdcbeb8599 | |
| parent | bdacb13da4adb91f2b732def5bac15804b92ea3c (diff) | |
UBI: Wire-up fastmap
Make fastmap known to Kconfig, UBI Makefile and MAINTAINERS.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
| -rw-r--r-- | MAINTAINERS | 6 | ||||
| -rw-r--r-- | drivers/mtd/ubi/Kconfig | 21 | ||||
| -rw-r--r-- | drivers/mtd/ubi/Makefile | 1 |
3 files changed, 28 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 6185d0513584..57b9b9cf7e31 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6630,6 +6630,12 @@ F: drivers/mtd/ubi/ F: include/linux/mtd/ubi.h F: include/mtd/ubi-user.h +UNSORTED BLOCK IMAGES (UBI) Fastmap +M: Richard Weinberger <richard@nod.at> +L: linux-mtd@lists.infradead.org +S: Maintained +F: drivers/mtd/ubi/fastmap.c + USB ACM DRIVER M: Oliver Neukum <oliver@neukum.name> L: linux-usb@vger.kernel.org diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig index 271a842f8c39..36663af56d89 100644 --- a/drivers/mtd/ubi/Kconfig +++ b/drivers/mtd/ubi/Kconfig @@ -56,6 +56,27 @@ config MTD_UBI_BEB_LIMIT Leave the default value if unsure. +config MTD_UBI_FASTMAP + bool "UBI Fastmap (Experimental feature)" + default n + help + Important: this feature is experimental so far and the on-flash + format for fastmap may change in the next kernel versions + + Fastmap is a mechanism which allows attaching an UBI device + in nearly constant time. Instead of scanning the whole MTD device it + only has to locate a checkpoint (called fastmap) on the device. + The on-flash fastmap contains all information needed to attach + the device. Using fastmap makes only sense on large devices where + attaching by scanning takes long. UBI will not automatically install + a fastmap on old images, but you can set the UBI module parameter + fm_autoconvert to 1 if you want so. Please note that fastmap-enabled + images are still usable with UBI implementations without + fastmap support. On typical flash devices the whole fastmap fits + into one PEB. UBI will reserve PEBs to hold two fastmaps. + + If in doubt, say "N". + config MTD_UBI_GLUEBI tristate "MTD devices emulation driver (gluebi)" help diff --git a/drivers/mtd/ubi/Makefile b/drivers/mtd/ubi/Makefile index a0803ac74712..b46b0c978581 100644 --- a/drivers/mtd/ubi/Makefile +++ b/drivers/mtd/ubi/Makefile @@ -2,5 +2,6 @@ obj-$(CONFIG_MTD_UBI) += ubi.o ubi-y += vtbl.o vmt.o upd.o build.o cdev.o kapi.o eba.o io.o wl.o attach.o ubi-y += misc.o debug.o +ubi-$(CONFIG_MTD_UBI_FASTMAP) += fastmap.o obj-$(CONFIG_MTD_UBI_GLUEBI) += gluebi.o |