linux-kernel - [PATCH 5/6] Add support for LZO-compressed kernels on x86

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Date:	Mon,  3 Aug 2009 16:58:20 +0200
From:	Albin Tonnerre <albin.tonnerre@...e-electrons.com>
To:	sam@...nborg.org
Cc:	hpa@...or.com, linux@....linux.org.uk, alain@...ff.lu,
	linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	akpm@...ux-foundation.org,
	Albin Tonnerre <albin.tonnerre@...e-electrons.com>
Subject: [PATCH 5/6] Add support for LZO-compressed kernels on x86

This is the third and last part of the patch, which contains the
necessary changes to the x86 Kconfig and boot/compressed to allow the
use of this new compression method

Signed-off-by: Albin Tonnerre <albin.tonnerre@...e-electrons.com>
---
 arch/x86/Kconfig                  |    1 +
 arch/x86/boot/compressed/Makefile |    5 ++++-
 arch/x86/boot/compressed/misc.c   |    4 ++++
 3 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 738bdc6..49974d3 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -48,6 +48,7 @@ config X86
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_BZIP2
 	select HAVE_KERNEL_LZMA
+	select HAVE_KERNEL_LZO
 	select HAVE_ARCH_KMEMCHECK
 
 config OUTPUT_FORMAT
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index e2ff504..95bfe0e 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -4,7 +4,7 @@
 # create a compressed vmlinux image from the original vmlinux
 #
 
-targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
+targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma vmlinux.bin.lzo head_$(BITS).o misc.o piggy.o
 
 KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
 KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
@@ -48,10 +48,13 @@ $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,bzip2)
 $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,lzma)
+$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
+	$(call if_changed,lzo)
 
 suffix-$(CONFIG_KERNEL_GZIP)	:= gz
 suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
 suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
+suffix-$(CONFIG_KERNEL_LZO) 	:= lzo
 
 quiet_cmd_mkpiggy = MKPIGGY $@
       cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 842b2a3..3b22fe8 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -162,6 +162,10 @@ static int lines, cols;
 #include "../../../../lib/decompress_unlzma.c"
 #endif
 
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
 static void scroll(void)
 {
 	int i;
-- 
1.6.3.3

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