--- a/arch/arm/Kconfig

+++ b/arch/arm/Kconfig

@@ -20,6 +20,7 @@ config ARM

select HAVE_KERNEL_GZIP

select HAVE_KERNEL_LZO

select HAVE_KERNEL_LZMA

+ select HAVE_KERNEL_XZ

select HAVE_IRQ_WORK

select HAVE_PERF_EVENTS

select PERF_USE_VMALLOC

--- a/arch/arm/boot/compressed/decompress.c

+++ b/arch/arm/boot/compressed/decompress.c

@@ -44,6 +44,13 @@ extern void error(char *);

#include "../../../../lib/decompress_unlzma.c"

#endif

+#ifdef CONFIG_KERNEL_XZ

+#define memmove memmove

+#define memcpy memcpy

+#include "../../../../lib/decompress_unxz.c"

+#endif

+

+

int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))

{

return decompress(input, len, NULL, NULL, output, NULL, error);

--- /dev/null

+++ b/arch/arm/boot/compressed/piggy.xzkern.S

@@ -0,0 +1,6 @@

+ .section .piggydata,#alloc

+ .globl input_data

+input_data:

+ .incbin "arch/arm/boot/compressed/piggy.xzkern"

+ .globl input_data_end

+input_data_end:

--- a/lib/xz/xz_dec_stream.c

+++ b/lib/xz/xz_dec_stream.c

@@ -9,6 +9,7 @@

#include "xz_private.h"

#include "xz_stream.h"

+#include <linux/kernel.h>

/* Hash used to validate the Index field */

struct xz_dec_hash {