From e76e1fdfa8f8dc1ea6699923cf5d92b5bee9c936 Mon Sep 17 00:00:00 2001
From: Kyungsik Lee <kyungsik.lee@lge.com>
Date: Mon, 8 Jul 2013 16:01:46 -0700
Subject: 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>
---
 usr/Kconfig | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'usr/Kconfig')

diff --git a/usr/Kconfig b/usr/Kconfig
index 085872bb2bb5..642f503d3e9f 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -90,6 +90,15 @@ config RD_LZO
 	  Support loading of a LZO encoded initial ramdisk or cpio buffer
 	  If unsure, say N.
 
+config RD_LZ4
+	bool "Support initial ramdisks compressed using LZ4" if EXPERT
+	default !EXPERT
+	depends on BLK_DEV_INITRD
+	select DECOMPRESS_LZ4
+	help
+	  Support loading of a LZ4 encoded initial ramdisk or cpio buffer
+	  If unsure, say N.
+
 choice
 	prompt "Built-in initramfs compression mode" if INITRAMFS_SOURCE!=""
 	help
-- 
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