[PATCH 1/2] ARM: remove bzImage target

bzImage has been just an alias for zImage for more than a decade.
It would not hurt to delete it.

Signed-off-by: Masahiro Yamada <redacted>
---

 arch/arm/Makefile | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 46fb1ca..d6d453f 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile

@@ -312,13 +312,10 @@ boot := arch/arm/boot
 archprepare:
 	$(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h
 
-# Convert bzImage to zImage
-bzImage: zImage
-
 BOOT_TARGETS	= zImage Image xipImage bootpImage uImage
 INSTALL_TARGETS	= zinstall uinstall install
 
-PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
+PHONY += $(BOOT_TARGETS) $(INSTALL_TARGETS)
 
 bootpImage uImage: zImage
 zImage: Image

-- 
1.9.1

Commit 3939f3345050 ("ARM: 8418/1: add boot image dependencies to not
generate invalid images") fixed bad images generation in the parallel
building, but it is not efficient to descend into arch/arm/boot over
and over again.  It is also clumsy to display the same log message
"Kernel: arch/arm/boot/Image is ready" a couple of times.

  $ make ARCH=arm UIMAGE_LOADADDR=0x80208000 all uImage
      [snip]
    Kernel: arch/arm/boot/Image is ready
    Kernel: arch/arm/boot/Image is ready
    Kernel: arch/arm/boot/zImage is ready
    Building modules, stage 2.
    MODPOST 279 modules
    Kernel: arch/arm/boot/Image is ready
    Kernel: arch/arm/boot/zImage is ready
    UIMAGE  arch/arm/boot/uImage
  Image Name:   Linux-4.5.0-rc3
  Created:      Mon Feb  8 13:22:53 2016
  Image Type:   ARM Linux Kernel Image (uncompressed)
  Data Size:    6768768 Bytes = 6610.12 kB = 6.46 MB
  Load Address: 80208000
  Entry Point:  80208000
    Image arch/arm/boot/uImage is ready

This commit allows arch/arm/boot/Makefile to build boot images at once
instead of generating them one by one.  Of course, it works correctly
also in parallel building.

Signed-off-by: Masahiro Yamada <redacted>
---

 arch/arm/Makefile | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index d6d453f..6db669e 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile

@@ -315,13 +315,17 @@ archprepare:
 BOOT_TARGETS	= zImage Image xipImage bootpImage uImage
 INSTALL_TARGETS	= zinstall uinstall install
 
-PHONY += $(BOOT_TARGETS) $(INSTALL_TARGETS)
+PHONY += $(BOOT_TARGETS) $(INSTALL_TARGETS) __build_images
 
-bootpImage uImage: zImage
-zImage: Image
+$(BOOT_TARGETS): __build_images
+	@:
 
-$(BOOT_TARGETS): vmlinux
-	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+__build_images: vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) \
+	$(addprefix $(boot)/,
+		$(sort $(filter $(BOOT_TARGETS),$(MAKECMDGOALS)) \
+			$(if $(filter all,$(MAKECMDGOALS)), $(KBUILD_IMAGE)) \
+			$(if $(MAKECMDGOALS),,$(KBUILD_IMAGE))))
 
 $(INSTALL_TARGETS):
 	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@

-- 
1.9.1

On Mon, Feb 08, 2016 at 02:04:58PM +0900, Masahiro Yamada wrote:

bzImage has been just an alias for zImage for more than a decade.
It would not hurt to delete it.

NAK.  bzImage exists for compatibility with build scripts, removing it
is likely to break people's scripts.  It does no harm to keep it.

-- 
RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.