sh: support XZ-compressed kernel.

Follow the x86 change and wire up support for the XZ decompressor.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boot/Makefile b/arch/sh/boot/Makefile
index 1ce6362..ba515d8 100644
--- a/arch/sh/boot/Makefile
+++ b/arch/sh/boot/Makefile
@@ -24,12 +24,13 @@
 suffix-$(CONFIG_KERNEL_GZIP)	:= gz
 suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
 suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
+suffix-$(CONFIG_KERNEL_XZ)	:= xz
 suffix-$(CONFIG_KERNEL_LZO)	:= lzo
 
 targets := zImage vmlinux.srec romImage uImage uImage.srec uImage.gz \
-	   uImage.bz2 uImage.lzma uImage.lzo uImage.bin
+	   uImage.bz2 uImage.lzma uImage.xz uImage.lzo uImage.bin
 extra-y += vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
-	   vmlinux.bin.lzo
+	   vmlinux.bin.xz vmlinux.bin.lzo
 subdir- := compressed romimage
 
 $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
@@ -76,6 +77,9 @@
 $(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,lzma)
 
+$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,xzkern)
+
 $(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,lzo)
 
@@ -88,6 +92,9 @@
 $(obj)/uImage.lzma: $(obj)/vmlinux.bin.lzma
 	$(call if_changed,uimage,lzma)
 
+$(obj)/uImage.xz: $(obj)/vmlinux.bin.xz
+	$(call if_changed,uimage,xz)
+
 $(obj)/uImage.lzo: $(obj)/vmlinux.bin.lzo
 	$(call if_changed,uimage,lzo)
 
diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
index cfa5a08..e0b0293 100644
--- a/arch/sh/boot/compressed/Makefile
+++ b/arch/sh/boot/compressed/Makefile
@@ -6,7 +6,7 @@
 
 targets		:= vmlinux vmlinux.bin vmlinux.bin.gz \
 		   vmlinux.bin.bz2 vmlinux.bin.lzma \
-		   vmlinux.bin.lzo \
+		   vmlinux.bin.xz vmlinux.bin.lzo \
 		   head_$(BITS).o misc.o piggy.o
 
 OBJECTS = $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/cache.o
@@ -50,6 +50,8 @@
 	$(call if_changed,bzip2)
 $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,lzma)
+$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
+	$(call if_changed,xzkern)
 $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,lzo)
 
diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc.c
index 27140a6..95470a4 100644
--- a/arch/sh/boot/compressed/misc.c
+++ b/arch/sh/boot/compressed/misc.c
@@ -61,6 +61,10 @@
 #include "../../../../lib/decompress_unlzma.c"
 #endif
 
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
 #ifdef CONFIG_KERNEL_LZO
 #include "../../../../lib/decompress_unlzo.c"
 #endif