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SubjectLinux 4.16-rc1: regression bisected, Debian kernel package tool make-kpkg stalls indefinitely during kernel build due to commit "kconfig: remove check_stdin()"
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L.S.,

The Debian kernel-package tool make-kpkg for easy building of upstream kernels on Debian fails with linux 4.16-rc1.

The tool (perl script) while invoked with:
make-kpkg --initrd --append_to_version -20180212 kernel_image

On a git tree with a .config from the previous kernel release, so new KConfig questions have to be asked on new or changed options.

The script stalls indefinitely while it seems to be excuting:
exec make kpkg_version=13.018+nmu1 -f /usr/share/kernel-package/ruleset/minimal.mk debian APPEND_TO_VERSION=-t440s-20180212 INITRD=YES

After using ctrl-c to break out it, i get:
^CFailed to create a ./debian directory: No such file or directory at /usr/bin/make-kpkg line 970.


Bisection turned up as culprit:
commit d2a04648a5dbc3d1d043b35257364f0197d4d868
kconfig: remove check_stdin()

Except silentoldconfig, valid_stdin is 1, so check_stdin() is no-op.

oldconfig and silentoldconfig work almost in the same way except that
the latter generates additional files under include/. Both ask users
for input for new symbols.

I do not know why only silentoldconfig requires stdio be tty.

$ rm -f .config; touch .config
$ yes "" | make oldconfig > stdout
$ rm -f .config; touch .config
$ yes "" | make silentoldconfig > stdout
make[1]: *** [silentoldconfig] Error 1
make: *** [silentoldconfig] Error 2
$ tail -n 4 stdout
Console input/output is redirected. Run 'make oldconfig' to update configuration.

scripts/kconfig/Makefile:40: recipe for target 'silentoldconfig' failed
Makefile:507: recipe for target 'silentoldconfig' failed

Redirection is useful, for example, for testing where we want to give
particular key inputs from a test file, then check the result.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>

Reverting this specific commit makes make-kpkg work again as usual.

Version of the kernel-package used:
ii kernel-package 13.018+nmu1


I also cc'ed the Debian developer who maintains the kernel-package package: Manoj Srivastava

--
Sander

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