#
  # Library configuration
  #
  
  config BINARY_PRINTF
  	def_bool n
  
  menu "Library routines"
  
  config RAID6_PQ
  	tristate
  
  config BITREVERSE
  	tristate
  
  config HAVE_ARCH_BITREVERSE
  	bool
  	default n
  	depends on BITREVERSE
  	help
  	  This option enables the use of hardware bit-reversal instructions on
  	  architectures which support such operations.
  
  config RATIONAL
  	bool
  
  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
  	bool
  	default n
  
  config STMP_DEVICE
  	bool
  
  config ARCH_USE_CMPXCHG_LOCKREF
  	bool
  
  config ARCH_HAS_FAST_MULTIPLIER
  	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
  	tristate "CRC32 perform self test on init"
  	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 CRC4
  	tristate "CRC4 functions"
  	help
  	  This option is provided for the case where no in-kernel-tree
  	  modules require CRC4 functions, but a module built outside
  	  the kernel tree does. Such modules that use library CRC4
  	  functions require M here.
  
  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 XXHASH
  	tristate
  
  config AUDIT_GENERIC
  	bool
  	depends on AUDIT && !AUDIT_ARCH
  	default y
  
  config AUDIT_ARCH_COMPAT_GENERIC
  	bool
  	default n
  
  config AUDIT_COMPAT_GENERIC
  	bool
  	depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
  	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 842_COMPRESS
  	select CRC32
  	tristate
  
  config 842_DECOMPRESS
  	select CRC32
  	tristate
  
  config ZLIB_INFLATE
  	tristate
  
  config ZLIB_DEFLATE
  	tristate
  	select BITREVERSE
  
  config LZO_COMPRESS
  	tristate
  
  config LZO_DECOMPRESS
  	tristate
  
  config LZ4_COMPRESS
  	tristate
  
  config LZ4HC_COMPRESS
  	tristate
  
  config LZ4_DECOMPRESS
  	tristate
  
  config ZSTD_COMPRESS
  	select XXHASH
  	tristate
  
  config ZSTD_DECOMPRESS
  	select XXHASH
  	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
  	bool
  
  #
  # reed solomon support is select'ed if needed
  #
  config REED_SOLOMON
  	tristate
  	
  config REED_SOLOMON_ENC8
  	bool
  
  config REED_SOLOMON_DEC8
  	bool
  
  config REED_SOLOMON_ENC16
  	bool
  
  config REED_SOLOMON_DEC16
  	bool
  
  #
  # BCH support is selected if needed
  #
  config BCH
  	tristate
  
  config BCH_CONST_PARAMS
  	bool
  	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
  	bool
  
  config TEXTSEARCH_KMP
  	tristate
  
  config TEXTSEARCH_BM
  	tristate
  
  config TEXTSEARCH_FSM
  	tristate
  
  config BTREE
  	bool
  
  config INTERVAL_TREE
  	bool
  	help
  	  Simple, embeddable, interval-tree. Can find the start of an
  	  overlapping range in log(n) time and then iterate over all
  	  overlapping nodes. The algorithm is implemented as an
  	  augmented rbtree.
  
  	  See:
  
  		Documentation/rbtree.txt
  
  	  for more information.
  
  config RADIX_TREE_MULTIORDER
  	bool
  
  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
  	bool
  	depends on !NO_IOMEM
  	select GENERIC_IO
  	default y
  
  config HAS_IOPORT_MAP
  	bool
  	depends on HAS_IOMEM && !NO_IOPORT_MAP
  	default y
  
  config HAS_DMA
  	bool
  	depends on !NO_DMA
  	default y
  
  config DMA_NOOP_OPS
  	bool
  	depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
  	default n
  
  config DMA_VIRT_OPS
  	bool
  	depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
  	default n
  
  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 CPU_RMAP
  	bool
  	depends on SMP
  
  config DQL
  	bool
  
  config GLOB
  	bool
  #	This actually supports modular compilation, but the module overhead
  #	is ridiculous for the amount of code involved.	Until an out-of-tree
  #	driver asks for it, we'll just link it directly it into the kernel
  #	when required.  Since we're ignoring out-of-tree users,	there's also
  #	no need bother prompting for a manual decision:
  #	prompt "glob_match() function"
  	help
  	  This option provides a glob_match function for performing
  	  simple text pattern matching.  It originated in the ATA code
  	  to blacklist particular drive models, but other device drivers
  	  may need similar functionality.
  
  	  All drivers in the Linux kernel tree that require this function
  	  should automatically select this option.  Say N unless you
  	  are compiling an out-of tree driver which tells you that it
  	  depends on this.
  
  config GLOB_SELFTEST
  	tristate "glob self-test on init"
  	depends on GLOB
  	help
  	  This option enables a simple self-test of the glob_match
  	  function on startup.	It is primarily useful for people
  	  working on the code to ensure they haven't introduced any
  	  regressions.
  
  	  It only adds a little bit of code and slows kernel boot (or
  	  module load) by a small amount, so you're welcome to play with
  	  it, but you probably don't need it.
  
  #
  # 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 LRU_CACHE
  	tristate
  
  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 IRQ_POLL
  	bool "IRQ polling library"
  	help
  	  Helper library to poll interrupt mitigation using polling.
  
  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
  	select 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"
  
  config SG_SPLIT
  	def_bool n
  	help
  	 Provides a helper to split scatterlists into chunks, each chunk being
  	 a scatterlist. This should be selected by a driver or an API which
  	 whishes to split a scatterlist amongst multiple DMA channels.
  
  config SG_POOL
  	def_bool n
  	help
  	 Provides a helper to allocate chained scatterlists. This should be
  	 selected by a driver or an API which whishes to allocate chained
  	 scatterlist.
  
  #
  # sg chaining option
  #
  
  config ARCH_HAS_SG_CHAIN
  	def_bool n
  
  config ARCH_HAS_PMEM_API
  	bool
  
  config ARCH_HAS_UACCESS_FLUSHCACHE
  	bool
  
  config STACKDEPOT
  	bool
  	select STACKTRACE
  
  config SBITMAP
  	bool
  
  config PARMAN
  	tristate "parman" if COMPILE_TEST
  
  config PRIME_NUMBERS
  	tristate
  
  config STRING_SELFTEST
  	bool "Test string functions"
  
  endmenu