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lib/Kconfig
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1da177e4c Linux-2.6.12-rc2 |
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# # Library configuration # |
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config BINARY_PRINTF def_bool n |
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menu "Library routines" |
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config RAID6_PQ tristate |
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config BITREVERSE tristate |
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config RATIONAL boolean |
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config GENERIC_STRNCPY_FROM_USER bool |
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config GENERIC_STRNLEN_USER bool |
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config GENERIC_FIND_FIRST_BIT |
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bool |
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config NO_GENERIC_PCI_IOPORT_MAP bool |
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config GENERIC_PCI_IOMAP bool |
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config GENERIC_IOMAP bool |
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select GENERIC_PCI_IOMAP |
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config GENERIC_IO boolean default n |
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config STMP_DEVICE bool |
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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. |
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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. |
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config CRC_T10DIF tristate "CRC calculation for the T10 Data Integrity Field" 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. |
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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. |
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config CRC32 |
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tristate "CRC32/CRC32c functions" |
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default y |
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select BITREVERSE |
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help This option is provided for the case where no in-kernel-tree |
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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. |
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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. |
5cde7656d crc32: select an ... |
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choice prompt "CRC32 implementation" depends on CRC32 default CRC32_SLICEBY8 |
82edb4baa crc32: add help t... |
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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. |
5cde7656d crc32: select an ... |
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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 |
ad241528c CRC7 support |
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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. |
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config LIBCRC32C tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" |
93027354d libcrc32c: Select... |
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select CRYPTO |
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select CRYPTO_CRC32C |
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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. |
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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. |
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config AUDIT_GENERIC bool depends on AUDIT && !AUDIT_ARCH default y |
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# # compression support is select'ed if needed # config ZLIB_INFLATE tristate config ZLIB_DEFLATE tristate |
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config LZO_COMPRESS tristate config LZO_DECOMPRESS tristate |
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source "lib/xz/Kconfig" |
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# |
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# These all provide a common interface (hence the apparent duplication with # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) # config DECOMPRESS_GZIP |
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select ZLIB_INFLATE |
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tristate config DECOMPRESS_BZIP2 tristate config DECOMPRESS_LZMA tristate |
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config DECOMPRESS_XZ select XZ_DEC tristate |
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config DECOMPRESS_LZO select LZO_DECOMPRESS tristate |
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# |
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# Generic allocator support is selected if needed # config GENERIC_ALLOCATOR boolean # |
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# 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 |
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# |
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# 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. # |
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# Textsearch support is select'ed if needed # |
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config TEXTSEARCH |
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boolean |
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config TEXTSEARCH_KMP |
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tristate |
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config TEXTSEARCH_BM |
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tristate |
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config TEXTSEARCH_FSM |
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tristate |
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config BTREE boolean |
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config HAS_IOMEM |
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boolean |
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depends on !NO_IOMEM |
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select GENERIC_IO |
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default y config HAS_IOPORT boolean depends on HAS_IOMEM && !NO_IOPORT |
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default y |
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config HAS_DMA boolean depends on !NO_DMA default y |
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config CHECK_SIGNATURE bool |
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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. |
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config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS depends on EXPERIMENTAL && BROKEN |
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config CPU_RMAP bool depends on SMP |
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config DQL bool |
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# # Netlink attribute parsing support is select'ed if needed # config NLATTR bool |
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# # Generic 64-bit atomic support is selected if needed # config GENERIC_ATOMIC64 bool |
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config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE def_bool y if GENERIC_ATOMIC64 |
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config LRU_CACHE tristate |
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config AVERAGE |
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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. |
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config CLZ_TAB bool |
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config CORDIC |
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tristate "CORDIC algorithm" |
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help |
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This option provides an implementation of the CORDIC algorithm; calculations are in fixed point. Module will be called cordic. |
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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. |
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config MPILIB |
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tristate |
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select CLZ_TAB |
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help Multiprecision maths library from GnuPG. It is used to implement RSA digital signature verification, which is used by IMA/EVM digital signature extension. |
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config SIGNATURE |
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tristate |
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depends on KEYS && CRYPTO select CRYPTO_SHA1 |
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select MPILIB help Digital signature verification. Currently only RSA is supported. Implementation is done using GnuPG MPI library |
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# # libfdt files, only selected if needed. # config LIBFDT bool |
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endmenu |