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[JFFS2] Use a single config option for write buffer support

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This patch replaces the current CONFIG_JFFS2_FS_NAND, CONFIG_JFFS2_FS_NOR_ECC
and CONFIG_JFFS2_FS_DATAFLASH with a single configuration option -
CONFIG_JFFS2_FS_WRITEBUFFER.

The only functional change of this patch is that the slower div/mod
calculations for SECTOR_ADDR(), PAGE_DIV() and PAGE_MOD() are now always
used when CONFIG_JFFS2_FS_WRITEBUFFER is enabled.

Signed-off-by: Andrew Victor <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Andrew Victor 2005-02-09 09:24:26 +00:00 • committed by Thomas Gleixner
commit 2f82ce1eb6
9 changed files with 35 additions and 70 deletions
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33
fs/Kconfig
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@ -1063,33 +1063,18 @@ config JFFS2_FS_DEBUG
If reporting bugs, please try to have available a full dump of the
messages at debug level 1 while the misbehaviour was occurring.
config JFFS2_FS_NAND
bool "JFFS2 support for NAND flash"
config JFFS2_FS_WRITEBUFFER
bool "JFFS2 write-buffering support"
depends on JFFS2_FS
default n
default y
help
This enables the support for NAND flash in JFFS2. NAND is a newer
type of flash chip design than the traditional NOR flash, with
higher density but a handful of characteristics which make it more
interesting for the file system to use.
This enables the write-buffering support in JFFS2.
Say 'N' unless you have NAND flash.
config JFFS2_FS_NOR_ECC
bool "JFFS2 support for ECC'd NOR flash (EXPERIMENTAL)"
depends on JFFS2_FS && EXPERIMENTAL
default n
help
This enables the experimental support for NOR flash with transparent
ECC for JFFS2. This type of flash chip is not common, however it is
available from ST Microelectronics.
config JFFS2_FS_DATAFLASH
bool "JFFS2 support for DataFlash (EXPERIMENTAL)"
depends on JFFS2_FS && EXPERIMENTAL
default n
help
This enables the experimental support for JFFS2 on DataFlash devices.
This functionality is required to support JFFS2 on the following
types of flash devices:
- NAND flash
- NOR flash with transparent ECC
- DataFlash
config JFFS2_COMPRESSION_OPTIONS
bool "Advanced compression options for JFFS2"