2 # Library configuration
8 menu "Library routines"
19 config GENERIC_FIND_FIRST_BIT
23 tristate "CRC-CCITT functions"
25 This option is provided for the case where no in-kernel-tree
26 modules require CRC-CCITT functions, but a module built outside
27 the kernel tree does. Such modules that use library CRC-CCITT
28 functions require M here.
31 tristate "CRC16 functions"
33 This option is provided for the case where no in-kernel-tree
34 modules require CRC16 functions, but a module built outside
35 the kernel tree does. Such modules that use library CRC16
36 functions require M here.
39 tristate "CRC calculation for the T10 Data Integrity Field"
41 This option is only needed if a module that's not in the
42 kernel tree needs to calculate CRC checks for use with the
43 SCSI data integrity subsystem.
46 tristate "CRC ITU-T V.41 functions"
48 This option is provided for the case where no in-kernel-tree
49 modules require CRC ITU-T V.41 functions, but a module built outside
50 the kernel tree does. Such modules that use library CRC ITU-T V.41
51 functions require M here.
54 tristate "CRC32 functions"
58 This option is provided for the case where no in-kernel-tree
59 modules require CRC32 functions, but a module built outside the
60 kernel tree does. Such modules that use library CRC32 functions
64 tristate "CRC7 functions"
66 This option is provided for the case where no in-kernel-tree
67 modules require CRC7 functions, but a module built outside
68 the kernel tree does. Such modules that use library CRC7
69 functions require M here.
72 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
76 This option is provided for the case where no in-kernel-tree
77 modules require CRC32c functions, but a module built outside the
78 kernel tree does. Such modules that use library CRC32c functions
79 require M here. See Castagnoli93.
80 Module will be libcrc32c.
83 tristate "CRC8 function"
85 This option provides CRC8 function. Drivers may select this
86 when they need to do cyclic redundancy check according CRC8
87 algorithm. Module will be called crc8.
91 depends on AUDIT && !AUDIT_ARCH
95 # compression support is select'ed if needed
106 config LZO_DECOMPRESS
109 source "lib/xz/Kconfig"
112 # These all provide a common interface (hence the apparent duplication with
113 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
115 config DECOMPRESS_GZIP
119 config DECOMPRESS_BZIP2
122 config DECOMPRESS_LZMA
129 config DECOMPRESS_LZO
130 select LZO_DECOMPRESS
134 # Generic allocator support is selected if needed
136 config GENERIC_ALLOCATOR
140 # reed solomon support is select'ed if needed
145 config REED_SOLOMON_ENC8
148 config REED_SOLOMON_DEC8
151 config REED_SOLOMON_ENC16
154 config REED_SOLOMON_DEC16
158 # BCH support is selected if needed
163 config BCH_CONST_PARAMS
166 Drivers may select this option to force specific constant
167 values for parameters 'm' (Galois field order) and 't'
168 (error correction capability). Those specific values must
169 be set by declaring default values for symbols BCH_CONST_M
171 Doing so will enable extra compiler optimizations,
172 improving encoding and decoding performance up to 2x for
173 usual (m,t) values (typically such that m*t < 200).
174 When this option is selected, the BCH library supports
175 only a single (m,t) configuration. This is mainly useful
176 for NAND flash board drivers requiring known, fixed BCH
183 Constant value for Galois field order 'm'. If 'k' is the
184 number of data bits to protect, 'm' should be chosen such
185 that (k + m*t) <= 2**m - 1.
186 Drivers should declare a default value for this symbol if
187 they select option BCH_CONST_PARAMS.
192 Constant value for error correction capability in bits 't'.
193 Drivers should declare a default value for this symbol if
194 they select option BCH_CONST_PARAMS.
197 # Textsearch support is select'ed if needed
202 config TEXTSEARCH_KMP
208 config TEXTSEARCH_FSM
221 depends on HAS_IOMEM && !NO_IOPORT
229 config CHECK_SIGNATURE
232 config CPUMASK_OFFSTACK
233 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
235 Use dynamic allocation for cpumask_var_t, instead of putting
236 them on the stack. This is a bit more expensive, but avoids
239 config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
240 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
241 depends on EXPERIMENTAL && BROKEN
248 # Netlink attribute parsing support is select'ed if needed
254 # Generic 64-bit atomic support is selected if needed
256 config GENERIC_ATOMIC64
263 bool "Averaging functions"
265 This option is provided for the case where no in-kernel-tree
266 modules require averaging functions, but a module built outside
267 the kernel tree does. Such modules that use library averaging
268 functions require Y here.
276 tristate "Cordic function"
278 The option provides arithmetic function using cordic algorithm
279 so its calculations are in fixed point. Modules can select this
280 when they require this function. Module will be called cordic.