## Library configuration# config BINARY_PRINTF	def_bool n menu "Library routines" config RAID6_PQ	tristate config BITREVERSE	tristate config RATIONAL	boolean config GENERIC_STRNCPY_FROM_USER	bool config GENERIC_STRNLEN_USER	bool config GENERIC_NET_UTILS	bool config GENERIC_FIND_FIRST_BIT	bool config NO_GENERIC_PCI_IOPORT_MAP	bool config GENERIC_PCI_IOMAP	bool config GENERIC_IOMAP	bool	select GENERIC_PCI_IOMAP config GENERIC_IO	boolean	default n config STMP_DEVICE	bool config PERCPU_RWSEM	boolean config ARCH_USE_CMPXCHG_LOCKREF	bool config CRC_CCITT	tristate "CRC-CCITT functions"	help	  This option is provided for the case where no in-kernel-tree	  modules require CRC-CCITT functions, but a module built outside	  the kernel tree does. Such modules that use library CRC-CCITT	  functions require M here. config CRC16	tristate "CRC16 functions"	help	  This option is provided for the case where no in-kernel-tree	  modules require CRC16 functions, but a module built outside	  the kernel tree does. Such modules that use library CRC16	  functions require M here. config CRC_T10DIF	tristate "CRC calculation for the T10 Data Integrity Field"	select CRYPTO	select CRYPTO_CRCT10DIF	help	  This option is only needed if a module that's not in the	  kernel tree needs to calculate CRC checks for use with the	  SCSI data integrity subsystem. config CRC_ITU_T	tristate "CRC ITU-T V.41 functions"	help	  This option is provided for the case where no in-kernel-tree	  modules require CRC ITU-T V.41 functions, but a module built outside	  the kernel tree does. Such modules that use library CRC ITU-T V.41	  functions require M here. config CRC32	tristate "CRC32/CRC32c functions"	default y	select BITREVERSE	help	  This option is provided for the case where no in-kernel-tree	  modules require CRC32/CRC32c functions, but a module built outside	  the kernel tree does. Such modules that use library CRC32/CRC32c	  functions require M here. config CRC32_SELFTEST	bool "CRC32 perform self test on init"	default n	depends on CRC32	help	  This option enables the CRC32 library functions to perform a	  self test on initialization. The self test computes crc32_le	  and crc32_be over byte strings with random alignment and length	  and computes the total elapsed time and number of bytes processed. choice	prompt "CRC32 implementation"	depends on CRC32	default CRC32_SLICEBY8	help	  This option allows a kernel builder to override the default choice	  of CRC32 algorithm.  Choose the default ("slice by 8") unless you	  know that you need one of the others. config CRC32_SLICEBY8	bool "Slice by 8 bytes"	help	  Calculate checksum 8 bytes at a time with a clever slicing algorithm.	  This is the fastest algorithm, but comes with a 8KiB lookup table.	  Most modern processors have enough cache to hold this table without	  thrashing the cache. 	  This is the default implementation choice.  Choose this one unless	  you have a good reason not to. config CRC32_SLICEBY4	bool "Slice by 4 bytes"	help	  Calculate checksum 4 bytes at a time with a clever slicing algorithm.	  This is a bit slower than slice by 8, but has a smaller 4KiB lookup	  table. 	  Only choose this option if you know what you are doing. config CRC32_SARWATE	bool "Sarwate's Algorithm (one byte at a time)"	help	  Calculate checksum a byte at a time using Sarwate's algorithm.  This	  is not particularly fast, but has a small 256 byte lookup table. 	  Only choose this option if you know what you are doing. config CRC32_BIT	bool "Classic Algorithm (one bit at a time)"	help	  Calculate checksum one bit at a time.  This is VERY slow, but has	  no lookup table.  This is provided as a debugging option. 	  Only choose this option if you are debugging crc32. endchoice config CRC7	tristate "CRC7 functions"	help	  This option is provided for the case where no in-kernel-tree	  modules require CRC7 functions, but a module built outside	  the kernel tree does. Such modules that use library CRC7	  functions require M here. config LIBCRC32C	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"	select CRYPTO	select CRYPTO_CRC32C	help	  This option is provided for the case where no in-kernel-tree	  modules require CRC32c functions, but a module built outside the	  kernel tree does. Such modules that use library CRC32c functions	  require M here.  See Castagnoli93.	  Module will be libcrc32c. config CRC8	tristate "CRC8 function"	help	  This option provides CRC8 function. Drivers may select this	  when they need to do cyclic redundancy check according CRC8	  algorithm. Module will be called crc8. config AUDIT_GENERIC	bool	depends on AUDIT && !AUDIT_ARCH	default y config RANDOM32_SELFTEST	bool "PRNG perform self test on init"	default n	help	  This option enables the 32 bit PRNG library functions to perform a	  self test on initialization. ## compression support is select'ed if needed#config ZLIB_INFLATE	tristate config ZLIB_DEFLATE	tristate config LZO_COMPRESS	tristate config LZO_DECOMPRESS	tristate config LZ4_COMPRESS	tristate config LZ4HC_COMPRESS	tristate config LZ4_DECOMPRESS	tristate source "lib/xz/Kconfig" ## These all provide a common interface (hence the apparent duplication with# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)#config DECOMPRESS_GZIP	select ZLIB_INFLATE	tristate config DECOMPRESS_BZIP2	tristate config DECOMPRESS_LZMA	tristate config DECOMPRESS_XZ	select XZ_DEC	tristate config DECOMPRESS_LZO	select LZO_DECOMPRESS	tristate config DECOMPRESS_LZ4	select LZ4_DECOMPRESS	tristate ## Generic allocator support is selected if needed#config GENERIC_ALLOCATOR	boolean ## reed solomon support is select'ed if needed#config REED_SOLOMON	tristate	config REED_SOLOMON_ENC8	boolean config REED_SOLOMON_DEC8	boolean config REED_SOLOMON_ENC16	boolean config REED_SOLOMON_DEC16	boolean ## BCH support is selected if needed#config BCH	tristate config BCH_CONST_PARAMS	boolean	help	  Drivers may select this option to force specific constant	  values for parameters 'm' (Galois field order) and 't'	  (error correction capability). Those specific values must	  be set by declaring default values for symbols BCH_CONST_M	  and BCH_CONST_T.	  Doing so will enable extra compiler optimizations,	  improving encoding and decoding performance up to 2x for	  usual (m,t) values (typically such that m*t < 200).	  When this option is selected, the BCH library supports	  only a single (m,t) configuration. This is mainly useful	  for NAND flash board drivers requiring known, fixed BCH	  parameters. config BCH_CONST_M	int	range 5 15	help	  Constant value for Galois field order 'm'. If 'k' is the	  number of data bits to protect, 'm' should be chosen such	  that (k + m*t) <= 2**m - 1.	  Drivers should declare a default value for this symbol if	  they select option BCH_CONST_PARAMS. config BCH_CONST_T	int	help	  Constant value for error correction capability in bits 't'.	  Drivers should declare a default value for this symbol if	  they select option BCH_CONST_PARAMS. ## Textsearch support is select'ed if needed#config TEXTSEARCH	boolean config TEXTSEARCH_KMP	tristate config TEXTSEARCH_BM	tristate config TEXTSEARCH_FSM	tristate config BTREE	boolean config ASSOCIATIVE_ARRAY	bool	help	  Generic associative array.  Can be searched and iterated over whilst	  it is being modified.  It is also reasonably quick to search and	  modify.  The algorithms are non-recursive, and the trees are highly	  capacious. 	  See: 		Documentation/assoc_array.txt 	  for more information. config HAS_IOMEM	boolean	depends on !NO_IOMEM	select GENERIC_IO	default y config HAS_IOPORT	boolean	depends on HAS_IOMEM && !NO_IOPORT	default y config HAS_DMA	boolean	depends on !NO_DMA	default y config CHECK_SIGNATURE	bool config CPUMASK_OFFSTACK	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS	help	  Use dynamic allocation for cpumask_var_t, instead of putting	  them on the stack.  This is a bit more expensive, but avoids	  stack overflow. config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS       bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS       depends on BROKEN config CPU_RMAP	bool	depends on SMP config DQL	bool ## Netlink attribute parsing support is select'ed if needed#config NLATTR	bool ## Generic 64-bit atomic support is selected if needed#config GENERIC_ATOMIC64       bool config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE	def_bool y if GENERIC_ATOMIC64 config LRU_CACHE	tristate config AVERAGE	bool "Averaging functions"	help	  This option is provided for the case where no in-kernel-tree	  modules require averaging functions, but a module built outside	  the kernel tree does. Such modules that use library averaging	  functions require Y here. 	  If unsure, say N. config CLZ_TAB	bool config CORDIC	tristate "CORDIC algorithm"	help	  This option provides an implementation of the CORDIC algorithm;	  calculations are in fixed point. Module will be called cordic. config DDR	bool "JEDEC DDR data"	help	  Data from JEDEC specs for DDR SDRAM memories,	  particularly the AC timing parameters and addressing	  information. This data is useful for drivers handling	  DDR SDRAM controllers. config MPILIB	tristate	select CLZ_TAB	help	  Multiprecision maths library from GnuPG.	  It is used to implement RSA digital signature verification,	  which is used by IMA/EVM digital signature extension. config SIGNATURE	tristate	depends on KEYS && CRYPTO	select CRYPTO_SHA1	select MPILIB	help	  Digital signature verification. Currently only RSA is supported.	  Implementation is done using GnuPG MPI library ## libfdt files, only selected if needed.#config LIBFDT	bool config OID_REGISTRY	tristate	help	  Enable fast lookup object identifier registry. config UCS2_STRING        tristate source "lib/fonts/Kconfig" endmenu