1config UBIFS_FS 2 tristate "UBIFS file system support" 3 select CRC16 4 select CRC32 5 select CRYPTO if UBIFS_FS_ADVANCED_COMPR 6 select CRYPTO if UBIFS_FS_LZO 7 select CRYPTO if UBIFS_FS_ZLIB 8 select CRYPTO_LZO if UBIFS_FS_LZO 9 select CRYPTO_DEFLATE if UBIFS_FS_ZLIB 10 depends on MTD_UBI 11 help 12 UBIFS is a file system for flash devices which works on top of UBI. 13 14config UBIFS_FS_XATTR 15 bool "Extended attributes support" 16 depends on UBIFS_FS 17 help 18 This option enables support of extended attributes. 19 20config UBIFS_FS_ADVANCED_COMPR 21 bool "Advanced compression options" 22 depends on UBIFS_FS 23 help 24 This option allows to explicitly choose which compressions, if any, 25 are enabled in UBIFS. Removing compressors means inability to read 26 existing file systems. 27 28 If unsure, say 'N'. 29 30config UBIFS_FS_LZO 31 bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR 32 depends on UBIFS_FS 33 default y 34 help 35 LZO compressor is generally faster than zlib but compresses worse. 36 Say 'Y' if unsure. 37 38config UBIFS_FS_ZLIB 39 bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR 40 depends on UBIFS_FS 41 default y 42 help 43 Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. 44 45# Debugging-related stuff 46config UBIFS_FS_DEBUG 47 bool "Enable debugging support" 48 depends on UBIFS_FS 49 select DEBUG_FS 50 select KALLSYMS 51 help 52 This option enables UBIFS debugging support. It makes sure various 53 assertions, self-checks, debugging messages and test modes are compiled 54 in (this all is compiled out otherwise). Assertions are light-weight 55 and this option also enables them. Self-checks, debugging messages and 56 test modes are switched off by default. Thus, it is safe and actually 57 recommended to have debugging support enabled, and it should not slow 58 down UBIFS. You can then further enable / disable individual debugging 59 features using UBIFS module parameters and the corresponding sysfs 60 interfaces. 61