This covers many, but far from all, of the symbols currently not
explicitly set.

Setting EXTRA_WARNINGS to disable perf building with -Werror stopped
working some time ago.  The make variable we should set now is WERROR.

This allows to detect the current flavour (here: "amd64") for an rc kernel
(here: $(uname -r) = 4.19.0-rc4-amd64). Also a bpo release is correctly
detected with this change.

On AMD platforms, some pins are GPIO memory mapped pins and are used to mux some
functionalities by firmware. This fixes a not available Elantech touchpad on
Lenovo IdeaPad 320-15ABR.

cloud-amd64: Enable CONFIG_ENA_ETHERNET

See merge request kernel-team/linux!68

This enables the driver for the Amazon ENA ethernet interface as used in Amazon
EC2.

hv_{kvp,vss}_daemon used to communicate with the corresponding kernel
drivers over netlink, but now they use char devices.  hv_fcopy_daemon
always used a char device.  Rather than checking for Hyper-V
specifically, change all of the init scripts and systemd service
definitions to check for the appropriate device nodes.

Delete the check-hyperv program that we used to check for Hyper-V
in init scripts.

This reverts commit 331fdb5f.

This was renamed for no good reason in 4.19-rc4.

CONFIG_DEBUG_INFO and CONFIG_MODULE_SIG are added in gencontrol.py,
so be consistent with that.

This unfortunately requires some ugly escaping of quotes.

Checksumming the whole of debian/changelog when deciding whether to
run gencontrol.py results in (a) frequent changes to control.md5sum
and (b) the need to invoke various targets twice during development.

I originally made this change to address (a), which would be an
annoyance if and when we start using dgit.  However, fixing (b) is a
nice benefit regardless of whether we do that.

Build a kernel image and udebs for riscv64. (Closes: #908161)

See merge request kernel-team/linux!66

The sfc net driver includes an MTD driver.  Currently this causes
nic-modules to include the MTD core on most architectures!

This was requested on debian-arm@lists.debian.org.

Gencontrol.parse_changelog() makes a list of all Debian versions with
the same upstream version, but doesn't use it.  This is left over from
the old multiple-series patch system which was removed in 2012.