diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2009-01-04 15:41:25 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-01-04 15:53:35 -0800 |
| commit | 2e9f3bddcbc711bb14d86c6f068a779bf3710247 (patch) | |
| tree | bd59cd7b10f8881d89ee4f39b295520a6f18e217 /init | |
| parent | 0f5e2d2484ccd3062bb1f63083bafa37041bc868 (diff) | |
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>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/init/Kconfig b/init/Kconfig index df84625b137..f9633c03cb1 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -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 |