dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

bzip2/lzma: make config machinery an arch configurable 

Impact: Bug fix (we should not show this menu on irrelevant architectures)

Make the config machinery to drive the gzip/bzip2/lzma selection
dependent on the architecture advertising HAVE_KERNEL_* so that we
don't display this for architectures where it doesn't matter.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2009-01-04 15:41:25 -08:00
parent 0f5e2d2484
commit 2e9f3bddcb
2 changed files with 34 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/Kconfig
View File

@ -39,6 +39,9 @@ config X86
select HAVE_GENERIC_DMA_COHERENT if X86_32
select HAVE_EFFICIENT_UNALIGNED_ACCESS
select USER_STACKTRACE_SUPPORT
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA
config ARCH_DEFCONFIG
string

52
init/Kconfig
View File

@ -101,10 +101,20 @@ config LOCALVERSION_AUTO
which is done within the script "scripts/setlocalversion".)
config HAVE_KERNEL_GZIP
bool
config HAVE_KERNEL_BZIP2
bool
config HAVE_KERNEL_LZMA
bool
choice
prompt "Kernel compression mode"
default KERNEL_GZIP
help
prompt "Kernel compression mode"
default KERNEL_GZIP
depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA
help
The linux kernel is a kind of self-extracting executable.
Several compression algorithms are available, which differ
in efficiency, compression and decompression speed.
@ -123,34 +133,34 @@ choice
If in doubt, select 'gzip'
config KERNEL_GZIP
bool "Gzip"
help
The old and tried gzip compression. Its compression ratio is
the poorest among the 3 choices; however its speed (both
compression and decompression) is the fastest.
bool "Gzip"
depends on HAVE_KERNEL_GZIP
help
The old and tried gzip compression. Its compression ratio is
the poorest among the 3 choices; however its speed (both
compression and decompression) is the fastest.
config KERNEL_BZIP2
bool "Bzip2"
depends on HAVE_KERNEL_BZIP2
help
Its compression ratio and speed is intermediate.
Decompression speed is slowest among the 3.
The kernel size is about 10 per cent smaller with bzip2,
in comparison to gzip.
Bzip2 uses a large amount of memory. For modern kernels
you will need at least 8MB RAM or more for booting.
Decompression speed is slowest among the three. The kernel
size is about 10% smaller with bzip2, in comparison to gzip.
Bzip2 uses a large amount of memory. For modern kernels you
will need at least 8MB RAM or more for booting.
config KERNEL_LZMA
bool "LZMA"
help
The most recent compression algorithm.
Its ratio is best, decompression speed is between the other
2. Compression is slowest.
The kernel size is about 33 per cent smaller with lzma,
in comparison to gzip.
bool "LZMA"
depends on HAVE_KERNEL_LZMA
help
The most recent compression algorithm.
Its ratio is best, decompression speed is between the other
two. Compression is slowest. The kernel size is about 33%
smaller with LZMA in comparison to gzip.
endchoice
config SWAP
bool "Support for paging of anonymous memory (swap)"
depends on MMU && BLOCK