config UBIFS_FS tristate "UBIFS file system support" select CRC16 select CRC32 select CRYPTO if UBIFS_FS_ADVANCED_COMPR select CRYPTO if UBIFS_FS_LZO select CRYPTO if UBIFS_FS_ZLIB select CRYPTO_LZO if UBIFS_FS_LZO select CRYPTO_DEFLATE if UBIFS_FS_ZLIB depends on MTD_UBI help UBIFS is a file system for flash devices which works on top of UBI. config UBIFS_FS_ADVANCED_COMPR bool "Advanced compression options" depends on UBIFS_FS help This option allows to explicitly choose which compressions, if any, are enabled in UBIFS. Removing compressors means inability to read existing file systems. If unsure, say 'N'. config UBIFS_FS_LZO bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR depends on UBIFS_FS default y help LZO compressor is generally faster than zlib but compresses worse. Say 'Y' if unsure. config UBIFS_FS_ZLIB bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR depends on UBIFS_FS default y help Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.