lib: add support for LZ4-compressed kernel

Add support for extracting LZ4-compressed kernel images, as well as
LZ4-compressed ramdisk images in the kernel boot process.

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Yann Collet <yann.collet.73@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index f1ed53c3aa44..e9cdc8ffdcee 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -194,6 +194,9 @@ config LZO_COMPRESS
 config LZO_DECOMPRESS
         tristate
 
+config LZ4_DECOMPRESS
+        tristate
+
 source "lib/xz/Kconfig"
 
 #
@@ -218,6 +221,10 @@ config DECOMPRESS_LZO
         select LZO_DECOMPRESS
         tristate
 
+config DECOMPRESS_LZ4
+        select LZ4_DECOMPRESS
+        tristate
+
 #
 # Generic allocator support is selected if needed
 #