linux-kernel - linux-next: build failure after merge of the kbuild tree

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Message-ID: <20220907223452.7f781217@canb.auug.org.au>
Date:   Wed, 7 Sep 2022 22:34:52 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the kbuild tree

Hi all,

After merging the kbuild tree, today's linux-next build (powerpc
ppc44x_defconfig) failed like this:

/home/sfr/next/next/scripts/mkuboot.sh: line 23: 153700 Bus error               ${MKIMAGE} "$@"

Caused by commit

  c4a7f46f7105 ("kbuild: build init/built-in.a just once")

Reverting that commit (and the following ones) fixes the problem. It
looks like UIMAGE_NAME gets corrupted in scripts/Makefile.lib as the
arguments to mkuboot.sh change from

A ppc -O linux -T kernel -C gzip -a 0x00700000 -e 0x007015a4 -n Linux-6.0.0-rc4 -d arch/powerpc/boot/cuImage.sam440ep.gz arch/powerpc/boot/cuImage.sam440ep

to

-A ppc -O linux -T kernel -C gzip -a 0x00700000 -e 0x007015a4 -n Linux-6.0.0-rc4 6.0.0-rc4 -d arch/powerpc/boot/cuImage.sam440ep.gz arch/powerpc/boot/cuImage.sam440ep

(note the extra "6.0.0-rc4") when the above commit is present.

So I have reverted commit c4a7f46f7105 and all the following commits in
the kbuild tree for today.

I had to do the above build with -j40 to make it consistently fail.

-- 
Cheers,
Stephen Rothwell

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