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 

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 
      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.masah...@socionext.com>
    Reviewed-by: Ulf Magnusson <ulfali...@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


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