initramfs: make initramfs compression choice non-optional

Currently, the choice of the initramfs compression mode is too complex
because users are allowed to not specify the compression mode at all.

I think it makes more sense to require users to choose the compression
mode explicitly, and delete the fallback defaults of INITRAMFS_COMPRESSION.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/usr/Kconfig b/usr/Kconfig
index 43934c1..ab61e81 100644 (file)
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -102,7 +102,6 @@ config RD_LZ4
 
 choice
        prompt "Built-in initramfs compression mode"
-       optional
        help
          This option allows you to decide by which algorithm the builtin
          initramfs will be compressed.  Several compression algorithms are
@@ -218,10 +217,3 @@ config INITRAMFS_COMPRESSION
        default ".xz"   if INITRAMFS_COMPRESSION_XZ
        default ".lzo"  if INITRAMFS_COMPRESSION_LZO
        default ".lz4"  if INITRAMFS_COMPRESSION_LZ4
-       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 ""