2 # Library configuration
8 menu "Library routines"
19 config GENERIC_FIND_FIRST_BIT
22 config GENERIC_FIND_NEXT_BIT
25 config GENERIC_FIND_LAST_BIT
30 tristate "CRC-CCITT functions"
32 This option is provided for the case where no in-kernel-tree
33 modules require CRC-CCITT functions, but a module built outside
34 the kernel tree does. Such modules that use library CRC-CCITT
35 functions require M here.
38 tristate "CRC16 functions"
40 This option is provided for the case where no in-kernel-tree
41 modules require CRC16 functions, but a module built outside
42 the kernel tree does. Such modules that use library CRC16
43 functions require M here.
46 tristate "CRC calculation for the T10 Data Integrity Field"
48 This option is only needed if a module that's not in the
49 kernel tree needs to calculate CRC checks for use with the
50 SCSI data integrity subsystem.
53 tristate "CRC ITU-T V.41 functions"
55 This option is provided for the case where no in-kernel-tree
56 modules require CRC ITU-T V.41 functions, but a module built outside
57 the kernel tree does. Such modules that use library CRC ITU-T V.41
58 functions require M here.
61 tristate "CRC32 functions"
65 This option is provided for the case where no in-kernel-tree
66 modules require CRC32 functions, but a module built outside the
67 kernel tree does. Such modules that use library CRC32 functions
71 tristate "CRC7 functions"
73 This option is provided for the case where no in-kernel-tree
74 modules require CRC7 functions, but a module built outside
75 the kernel tree does. Such modules that use library CRC7
76 functions require M here.
79 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
83 This option is provided for the case where no in-kernel-tree
84 modules require CRC32c functions, but a module built outside the
85 kernel tree does. Such modules that use library CRC32c functions
86 require M here. See Castagnoli93.
87 Module will be libcrc32c.
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
244 # Netlink attribute parsing support is select'ed if needed
250 # Generic 64-bit atomic support is selected if needed
252 config GENERIC_ATOMIC64