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>
---
 scripts/Makefile.lib | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'scripts/Makefile.lib')

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index f97869f1f09b..6031e2380638 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -311,6 +311,11 @@ cmd_lzo = (cat $(filter-out FORCE,$^) | \
 	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)
 
+quiet_cmd_lz4 = LZ4     $@
+cmd_lz4 = (cat $(filter-out FORCE,$^) | \
+	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
+	(rm -f $@ ; false)
+
 # U-Boot mkimage
 # ---------------------------------------------------------------------------
 
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