init/Kconfig: add option to disable kernel compression

Some ARC users say they can boot faster with without kernel compression.
This probably depends on things like the FLASH chip they use etc.

Until now, kernel compression can only be disabled by removing "select
HAVE_<compression>" lines from the architecture Kconfig.  So add the
Kconfig logic to permit disabling of kernel compression.

Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/init/Kconfig b/init/Kconfig
index bc8911fab28e..5496f307988e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -118,7 +118,6 @@ config HAVE_KERNEL_LZ4
 choice
         prompt "Kernel compression mode"
         default KERNEL_GZIP
-        depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4
         help
           The linux kernel is a kind of self-extracting executable.
           Several compression algorithms are available, which differ
@@ -137,6 +136,13 @@ choice
 
           If in doubt, select 'gzip'
 
+config KERNEL_UNCOMPRESSED
+        bool "No compression"
+        help
+          No compression at all. The kernel is huge but the compression and
+          decompression times are zero.
+          This is usually not what you want.
+
 config KERNEL_GZIP
         bool "Gzip"
         depends on HAVE_KERNEL_GZIP