[ARM] Kernel boot decompressor updates

- use 'Image' target for kernel image to be compressed rather than
  duplicating its generation.
- use .incbin-based generation of ELF objects from binary data rather
  than 'ld'-based generation.

arch/arm/boot/Makefile

@@ -75,6 +75,9 @@ $(obj)/Image: vmlinux FORCE
 	$(call if_changed,objcopy)
 	@echo '  Kernel: $@ is ready'
 
+$(obj)/compressed/vmlinux: $(obj)/Image FORCE
+	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
+
 $(obj)/zImage:	$(obj)/compressed/vmlinux FORCE
 	$(call if_changed,objcopy)
 	@echo '  Kernel: $@ is ready'
@@ -88,17 +91,15 @@ $(obj)/uImage:	$(obj)/zImage FORCE
 	$(call if_changed,uimage)
 	@echo '  Image $@ is ready'
 
+$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
+	$(Q)$(MAKE) $(build)=$(obj)/bootp $@
+	@:
+
 $(obj)/bootpImage: $(obj)/bootp/bootp FORCE
 	$(call if_changed,objcopy)
 	@echo '  Kernel: $@ is ready'
 
-$(obj)/compressed/vmlinux: vmlinux FORCE
-	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
-
-$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
-	$(Q)$(MAKE) $(build)=$(obj)/bootp $@
-
-.PHONY: initrd
+.PHONY: initrd FORCE
 initrd:
 	@test "$(INITRD_PHYS)" != "" || \
 	(echo This machine does not support INITRD; exit -1)

arch/arm/boot/compressed/Makefile

@@ -66,8 +66,8 @@ endif
 
 SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
 
-targets       := vmlinux vmlinux.lds piggy piggy.gz piggy.o \
-                 font.o head.o $(OBJS)
+targets       := vmlinux vmlinux.lds piggy.gz piggy.o font.o \
+		 head.o misc.o $(OBJS)
 EXTRA_CFLAGS  := -fpic
 EXTRA_AFLAGS  :=
 
@@ -89,16 +89,10 @@ $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
 	$(call if_changed,ld)
 	@:
 
-
-$(obj)/piggy: vmlinux FORCE
-	$(call if_changed,objcopy)
-
-$(obj)/piggy.gz: $(obj)/piggy FORCE
+$(obj)/piggy.gz: $(obj)/../Image FORCE
 	$(call if_changed,gzip)
 
-LDFLAGS_piggy.o := -r -b binary
 $(obj)/piggy.o:  $(obj)/piggy.gz FORCE
-	$(call if_changed,ld)
 
 CFLAGS_font.o := -Dstatic=
 $(obj)/font.o: $(FONTC)

arch/arm/boot/compressed/piggy.S

+	.section .piggydata,#alloc
+	.globl	input_data
+input_data:
+	.incbin	"arch/arm/boot/compressed/piggy.gz"
+	.globl	input_data_end
+input_data_end:

arch/arm/boot/compressed/vmlinux.lds.in

@@ -24,9 +24,7 @@ SECTIONS
     *(.rodata.*)
     *(.glue_7)
     *(.glue_7t)
-    input_data = .;
-    arch/arm/boot/compressed/piggy.o
-    input_data_end = .;
+    *(.piggydata)
     . = ALIGN(4);
   }