linux-kernel - Re: [PATCH v2] powerpc: Avoid circular dependency with zImage.%

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Date:	Thu, 12 Jun 2014 10:07:04 +0800
From:	Mike Qiu <qiudayu@...ux.vnet.ibm.com>
To:	Michal Marek <mmarek@...e.cz>
CC:	linuxppc-dev@...ts.ozlabs.org, Sam Ravnborg <sam@...nborg.org>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] powerpc: Avoid circular dependency with zImage.%

This v2 patch is good,

Tested-by: Mike Qiu <qiudayu@...ux.vnet.ibm.com>

On 06/11/2014 11:40 PM, Michal Marek wrote:
> The rule to create the final images uses a zImage.% pattern.
> Unfortunately, this also matches the names of the zImage.*.lds linker
> scripts, which appear as a dependency of the final images. This somehow
> worked when $(srctree) used to be an absolute path, but now the pattern
> matches too much. List only the images from $(image-y) as the target of
> the rule, to avoid the circular dependency.
>
> Signed-off-by: Michal Marek <mmarek@...e.cz>
> ---
> v2:
>    - Filter out duplicates in the target list
>    - fix the platform argument to cmd_wrap
>
>   arch/powerpc/boot/Makefile | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
> index 426dce7..ccc25ed 100644
> --- a/arch/powerpc/boot/Makefile
> +++ b/arch/powerpc/boot/Makefile
> @@ -333,8 +333,8 @@ $(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz
>   $(obj)/zImage.initrd.%: vmlinux $(wrapperbits)
>   	$(call if_changed,wrap,$*,,,$(obj)/ramdisk.image.gz)
>
> -$(obj)/zImage.%: vmlinux $(wrapperbits)
> -	$(call if_changed,wrap,$*)
> +$(addprefix $(obj)/, $(sort $(filter zImage.%, $(image-y)))): vmlinux $(wrapperbits)
> +	$(call if_changed,wrap,$(subst $(obj)/zImage.,,$@))
>
>   # dtbImage% - a dtbImage is a zImage with an embedded device tree blob
>   $(obj)/dtbImage.initrd.%: vmlinux $(wrapperbits) $(obj)/%.dtb

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