The patch titled
Subject: arm: add support for LZ4-compressed kernel
has been added to the -mm tree. Its filename is
arm-add-support-for-lz4-compressed-kernel.patch
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------------------------------------------------------
From: Kyungsik Lee <kyungsik.lee@xxxxxxx>
Subject: arm: add support for LZ4-compressed kernel
Integrates the LZ4 decompression code to the arm pre-boot code.
Signed-off-by: Kyungsik Lee <kyungsik.lee@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Florian Fainelli <florian@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/Kconfig | 1 +
arch/arm/boot/compressed/.gitignore | 1 +
arch/arm/boot/compressed/Makefile | 6 +++++-
arch/arm/boot/compressed/decompress.c | 4 ++++
arch/arm/boot/compressed/piggy.lz4.S | 6 ++++++
5 files changed, 17 insertions(+), 1 deletion(-)
diff -puN arch/arm/Kconfig~arm-add-support-for-lz4-compressed-kernel arch/arm/Kconfig
--- a/arch/arm/Kconfig~arm-add-support-for-lz4-compressed-kernel
+++ a/arch/arm/Kconfig
@@ -38,6 +38,7 @@ config ARM
select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
select HAVE_IDE if PCI || ISA || PCMCIA
select HAVE_KERNEL_GZIP
+ select HAVE_KERNEL_LZ4
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
select HAVE_KERNEL_XZ
diff -puN arch/arm/boot/compressed/.gitignore~arm-add-support-for-lz4-compressed-kernel arch/arm/boot/compressed/.gitignore
--- a/arch/arm/boot/compressed/.gitignore~arm-add-support-for-lz4-compressed-kernel
+++ a/arch/arm/boot/compressed/.gitignore
@@ -6,6 +6,7 @@ piggy.gzip
piggy.lzo
piggy.lzma
piggy.xzkern
+piggy.lz4
vmlinux
vmlinux.lds
diff -puN arch/arm/boot/compressed/Makefile~arm-add-support-for-lz4-compressed-kernel arch/arm/boot/compressed/Makefile
--- a/arch/arm/boot/compressed/Makefile~arm-add-support-for-lz4-compressed-kernel
+++ a/arch/arm/boot/compressed/Makefile
@@ -24,6 +24,9 @@ endif
AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
HEAD = head.o
OBJS += misc.o decompress.o
+ifeq ($(CONFIG_KERNEL_LZ4),y)
+CFLAGS_decompress.o := -Os
+endif
FONTC = $(srctree)/drivers/video/console/font_acorn_8x8.c
# string library code (-Os is enforced to keep it much smaller)
@@ -88,6 +91,7 @@ suffix_$(CONFIG_KERNEL_GZIP) = gzip
suffix_$(CONFIG_KERNEL_LZO) = lzo
suffix_$(CONFIG_KERNEL_LZMA) = lzma
suffix_$(CONFIG_KERNEL_XZ) = xzkern
+suffix_$(CONFIG_KERNEL_LZ4) = lz4
# Borrowed libfdt files for the ATAG compatibility mode
@@ -112,7 +116,7 @@ targets := vmlinux vmlinux.lds \
font.o font.c head.o misc.o $(OBJS)
# Make sure files are removed during clean
-extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
+extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \
lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs)
ifeq ($(CONFIG_FUNCTION_TRACER),y)
diff -puN arch/arm/boot/compressed/decompress.c~arm-add-support-for-lz4-compressed-kernel arch/arm/boot/compressed/decompress.c
--- a/arch/arm/boot/compressed/decompress.c~arm-add-support-for-lz4-compressed-kernel
+++ a/arch/arm/boot/compressed/decompress.c
@@ -51,6 +51,10 @@ extern char * strstr(const char * s1, co
#include "../../../../lib/decompress_unxz.c"
#endif
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
{
return decompress(input, len, NULL, NULL, output, NULL, error);
diff -puN /dev/null arch/arm/boot/compressed/piggy.lz4.S
--- /dev/null
+++ a/arch/arm/boot/compressed/piggy.lz4.S
@@ -0,0 +1,6 @@
+ .section .piggydata,#alloc
+ .globl input_data
+input_data:
+ .incbin "arch/arm/boot/compressed/piggy.lz4"
+ .globl input_data_end
+input_data_end:
_
Patches currently in -mm which might be from kyungsik.lee@xxxxxxx are
decompressor-add-lz4-decompressor-module.patch
lib-add-support-for-lz4-compressed-kernel.patch
arm-add-support-for-lz4-compressed-kernel.patch
x86-add-support-for-lz4-compressed-kernel.patch
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