initramfs: select builtin initram compression algorithm on KConfig instead of Makefile
Move the current builtin initram compression algorithm selection from
the Makefile into the INITRAMFS_COMPRESSION variable. This makes
deciding algorithm precedence easier and would allow for overrides if
new algorithms want to be tested.
Link: http://lkml.kernel.org/r/57EAD769.1090401@klondike.es
Signed-off-by: Francisco Blas Izquierdo Riera (klondike) <klondike@klondike.es>
Cc: P J P <ppandit@redhat.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/usr/Kconfig b/usr/Kconfig
index 572dcf7..bf8e8f1 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -98,3 +98,13 @@
help
Support loading of a LZ4 encoded initial ramdisk or cpio buffer
If unsure, say N.
+
+config INITRAMFS_COMPRESSION
+ string
+ default ".gz" if RD_GZIP
+ default ".lz4" if RD_LZ4
+ default ".lzo" if RD_LZO
+ default ".xz" if RD_XZ
+ default ".lzma" if RD_LZMA
+ default ".bz2" if RD_BZIP2
+ default ""