kpatch-dkms fails to build a module for the latest kernel in stable.

For more context on this change in the kernel, please see the
corresponding bug in iptables-netflow-dkms:
https://bugs.debian.org/990123

DKMS make.log for kpatch-0.6.0 for kernel 4.19.0-17-amd64 (x86_64)
Mon Jul 12 17:13:04 UTC 2021
make: Entering directory '/var/lib/dkms/kpatch/0.6.0/build/kmod'
make -C core clean
make[1]: Entering directory '/var/lib/dkms/kpatch/0.6.0/build/kmod/core'
rm -f -Rf .*.o.cmd .*.ko.cmd .tmp_versions *.o *.ko *.mod.c \
Module.symvers
make[1]: Leaving directory '/var/lib/dkms/kpatch/0.6.0/build/kmod/core'
make -C core
make[1]: Entering directory '/var/lib/dkms/kpatch/0.6.0/build/kmod/core'
make -C /lib/modules/4.19.0-17-amd64/build M=/var/lib/dkms/kpatch/0.6.0/build/kmod/core kpatch.ko
make[2]: Entering directory '/var/lib/dkms/kpatch/0.6.0/build/kmod/core'
make[2]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.
  CC [M]  /var/lib/dkms/kpatch/0.6.0/build/kmod/core/core.o
/var/lib/dkms/kpatch/0.6.0/build/kmod/core/core.c: In function 'kpatch_find_external_symbol':
/var/lib/dkms/kpatch/0.6.0/build/kmod/core/core.c:661:8: error: implicit declaration of function 'find_symbol'; did you mean 'sprint_symbol'? [-Werror=implicit-function-declaration]
  sym = find_symbol(name, NULL, NULL, true, true);
        ^~~~~~~~~~~
        sprint_symbol
/var/lib/dkms/kpatch/0.6.0/build/kmod/core/core.c:661:6: warning: assignment to 'const struct kernel_symbol *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
  sym = find_symbol(name, NULL, NULL, true, true);
      ^
cc1: some warnings being treated as errors
make[5]: *** [/usr/src/linux-headers-4.19.0-17-common/scripts/Makefile.build:309: /var/lib/dkms/kpatch/0.6.0/build/kmod/core/core.o] Error 1
make[4]: *** [/usr/src/linux-headers-4.19.0-17-common/Makefile:1738: kpatch.ko] Error 2
make[3]: *** [Makefile:146: sub-make] Error 2
make[2]: *** [Makefile:8: all] Error 2
make[2]: Leaving directory '/usr/src/linux-headers-4.19.0-17-amd64'
make[1]: *** [Makefile:13: kpatch.ko] Error 2
make[1]: Leaving directory '/var/lib/dkms/kpatch/0.6.0/build/kmod/core'
make: *** [Makefile:7: all] Error 2
make: Leaving directory '/var/lib/dkms/kpatch/0.6.0/build/kmod'

Andreas

Dear submitter,

as the package kpatch has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1072932

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Scott Kitterman (the ftpmaster behind the curtain)

Control: severity -1 important

kpatch 0.9.9 (currently in the delayed queue) is able to build patches
for linux 6.1. I haven't tested linux 4.19, but given 4.19 is no longer
included in any active debian release, I am reducing the severity of
this issue. However, I think it can be safely closed, and will do so in
some time (unless there is any objection).

Cheers,