Move the symbol SYS_JFFS2_SORT_FRAGMENTS to Kconfig and use the only remaining part of doc/README.JFFS2 that is still relevant and useful to the help for this option.
Signed-off-by: Tom Rini trini@konsulko.com --- doc/README.JFFS2 | 30 ------------------------------ fs/jffs2/Kconfig | 12 ++++++++++++ 2 files changed, 12 insertions(+), 30 deletions(-) delete mode 100644 doc/README.JFFS2
diff --git a/doc/README.JFFS2 b/doc/README.JFFS2 deleted file mode 100644 index fddefb174690..000000000000 --- a/doc/README.JFFS2 +++ /dev/null @@ -1,30 +0,0 @@ -JFFS2 options and usage. ------------------------ - -JFFS2 in U-Boot is a read only implementation of the file system in -Linux with the same name. To use JFFS2 define CONFIG_CMD_JFFS2. - -The module adds three new commands. -fsload - load binary file from a file system image -fsinfo - print information about file systems -ls - list files in a directory -chpart - change active partition - -If you do now need the commands, you can enable the filesystem separately -with CONFIG_FS_JFFS2 and call the jffs2 functions yourself. - -If you boot from a partition which is mounted writable, and you -update your boot environment by replacing single files on that -partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. Scanning -the JFFS2 filesystem takes *much* longer with this feature, though. -Sorting is done while inserting into the fragment list, which is -more or less a bubble sort. That algorithm is known to be O(n^2), -thus you should really consider if you can avoid it! - ---- - -TODO. - - Remove the assumption that JFFS can dereference a pointer - into the disk. The current code do not work with memory holes - or hardware with a sliding window (PCMCIA). diff --git a/fs/jffs2/Kconfig b/fs/jffs2/Kconfig index 0e79c3409062..3bf01cd03137 100644 --- a/fs/jffs2/Kconfig +++ b/fs/jffs2/Kconfig @@ -17,3 +17,15 @@ config JFFS2_NAND depends on FS_JFFS2 help Enable support for NAND flash as the backing store for JFFS2. + +config SYS_JFFS2_SORT_FRAGMENTS + bool "Enable JFFS2 sorting of filesystem fragments (SLOW!)" + depends on FS_JFFS2 + help + If you boot from a partition which is mounted writable, and you + update your boot environment by replacing single files on that + partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. + Scanning the JFFS2 filesystem takes *much* longer with this feature, + though. Sorting is done while inserting into the fragment list, + which is more or less a bubble sort. That algorithm is known to be + O(n^2), thus you should really consider if you can avoid it!