diff options
Diffstat (limited to 'lib/Kconfig')
| -rw-r--r-- | lib/Kconfig | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 0ee67e08ad3..9c10e38fc60 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -22,6 +22,9 @@ config GENERIC_FIND_FIRST_BIT config GENERIC_FIND_NEXT_BIT bool +config GENERIC_FIND_BIT_LE + bool + config GENERIC_FIND_LAST_BIT bool default y @@ -155,6 +158,45 @@ 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 @@ -201,6 +243,10 @@ config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS depends on EXPERIMENTAL && BROKEN +config CPU_RMAP + bool + depends on SMP + # # Netlink attribute parsing support is select'ed if needed # @@ -217,6 +263,13 @@ config LRU_CACHE tristate config AVERAGE - bool + 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. endmenu |