mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 03:21:32 +00:00
3ebe12439b
This implements the API defined in <linux/decompress/generic.h> which is used for kernel, initramfs, and initrd decompression. This patch together with the first patch is enough for XZ-compressed initramfs and initrd; XZ-compressed kernel will need arch-specific changes. The buffering requirements described in decompress_unxz.c are stricter than with gzip, so the relevant changes should be done to the arch-specific code when adding support for XZ-compressed kernel. Similarly, the heap size in arch-specific pre-boot code may need to be increased (30 KiB is enough). The XZ decompressor needs memmove(), memeq() (memcmp() == 0), and memzero() (memset(ptr, 0, size)), which aren't available in all arch-specific pre-boot environments. I'm including simple versions in decompress_unxz.c, but a cleaner solution would naturally be nicer. Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Alain Knaff <alain@knaff.lu> Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com> Cc: Phillip Lougher <phillip@lougher.demon.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
223 lines
4.2 KiB
Plaintext
223 lines
4.2 KiB
Plaintext
#
|
|
# Library configuration
|
|
#
|
|
|
|
config BINARY_PRINTF
|
|
def_bool n
|
|
|
|
menu "Library routines"
|
|
|
|
config RAID6_PQ
|
|
tristate
|
|
|
|
config BITREVERSE
|
|
tristate
|
|
|
|
config RATIONAL
|
|
boolean
|
|
|
|
config GENERIC_FIND_FIRST_BIT
|
|
bool
|
|
|
|
config GENERIC_FIND_NEXT_BIT
|
|
bool
|
|
|
|
config GENERIC_FIND_LAST_BIT
|
|
bool
|
|
default y
|
|
|
|
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"
|
|
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 functions"
|
|
default y
|
|
select BITREVERSE
|
|
help
|
|
This option is provided for the case where no in-kernel-tree
|
|
modules require CRC32 functions, but a module built outside the
|
|
kernel tree does. Such modules that use library CRC32 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 AUDIT_GENERIC
|
|
bool
|
|
depends on AUDIT && !AUDIT_ARCH
|
|
default y
|
|
|
|
#
|
|
# compression support is select'ed if needed
|
|
#
|
|
config ZLIB_INFLATE
|
|
tristate
|
|
|
|
config ZLIB_DEFLATE
|
|
tristate
|
|
|
|
config LZO_COMPRESS
|
|
tristate
|
|
|
|
config LZO_DECOMPRESS
|
|
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
|
|
|
|
#
|
|
# Generic allocator support is selected if needed
|
|
#
|
|
config GENERIC_ALLOCATOR
|
|
boolean
|
|
|
|
#
|
|
# 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
|
|
|
|
#
|
|
# Textsearch support is select'ed if needed
|
|
#
|
|
config TEXTSEARCH
|
|
boolean
|
|
|
|
config TEXTSEARCH_KMP
|
|
tristate
|
|
|
|
config TEXTSEARCH_BM
|
|
tristate
|
|
|
|
config TEXTSEARCH_FSM
|
|
tristate
|
|
|
|
config BTREE
|
|
boolean
|
|
|
|
config HAS_IOMEM
|
|
boolean
|
|
depends on !NO_IOMEM
|
|
default y
|
|
|
|
config HAS_IOPORT
|
|
boolean
|
|
depends on HAS_IOMEM && !NO_IOPORT
|
|
default y
|
|
|
|
config HAS_DMA
|
|
boolean
|
|
depends on !NO_DMA
|
|
default y
|
|
|
|
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 DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
|
|
bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
|
|
depends on EXPERIMENTAL && BROKEN
|
|
|
|
#
|
|
# 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 AVERAGE
|
|
bool
|
|
|
|
endmenu
|