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-rw-r--r--init/Kconfig18
1 files changed, 14 insertions, 4 deletions
diff --git a/init/Kconfig b/init/Kconfig
index e9fa3007a6fc..ed9c19e02f93 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -115,10 +115,13 @@ config HAVE_KERNEL_BZIP2
115config HAVE_KERNEL_LZMA 115config HAVE_KERNEL_LZMA
116 bool 116 bool
117 117
118config HAVE_KERNEL_LZO
119 bool
120
118choice 121choice
119 prompt "Kernel compression mode" 122 prompt "Kernel compression mode"
120 default KERNEL_GZIP 123 default KERNEL_GZIP
121 depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA 124 depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_LZO
122 help 125 help
123 The linux kernel is a kind of self-extracting executable. 126 The linux kernel is a kind of self-extracting executable.
124 Several compression algorithms are available, which differ 127 Several compression algorithms are available, which differ
@@ -141,9 +144,8 @@ config KERNEL_GZIP
141 bool "Gzip" 144 bool "Gzip"
142 depends on HAVE_KERNEL_GZIP 145 depends on HAVE_KERNEL_GZIP
143 help 146 help
144 The old and tried gzip compression. Its compression ratio is 147 The old and tried gzip compression. It provides a good balance
145 the poorest among the 3 choices; however its speed (both 148 between compression ratio and decompression speed.
146 compression and decompression) is the fastest.
147 149
148config KERNEL_BZIP2 150config KERNEL_BZIP2
149 bool "Bzip2" 151 bool "Bzip2"
@@ -164,6 +166,14 @@ config KERNEL_LZMA
164 two. Compression is slowest. The kernel size is about 33% 166 two. Compression is slowest. The kernel size is about 33%
165 smaller with LZMA in comparison to gzip. 167 smaller with LZMA in comparison to gzip.
166 168
169config KERNEL_LZO
170 bool "LZO"
171 depends on HAVE_KERNEL_LZO
172 help
173 Its compression ratio is the poorest among the 4. The kernel
174 size is about about 10% bigger than gzip; however its speed
175 (both compression and decompression) is the fastest.
176
167endchoice 177endchoice
168 178
169config SWAP 179config SWAP