In bfe9c928c1 the default kernel has been
updated to version 4.14 and the declarations for allow_signal() and
signal_pending() are no longer exposed via kthread.h, so let's actually
use the right header files.
I've added a condition for kernel 4.10 and upwards to include the
linux/sched/signal.h header file, because that got introduced in version
4.10. Even if the declaration would still reside in kthread.h (I haven't
checked) for version 4.10 it won't hurt and the compilation will still
succeed.
Tested against kernel 4.9 and 4.14 and the build now succeeds.
Signed-off-by: aszlig <aszlig@nix.build>
Since 97bfc2fac9, runCommand doesn't
include a compiler anymore. So let's switch to the new runCommandCC,
which resembles the old state.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
This ensures that most "trivial" derivations used to build NixOS
configurations no longer depend on GCC. For commands that do invoke
gcc, there is runCommandCC.
As @edolstra pointed out that the kernel module might be painful to
maintain. I strongly disagree because it's only a small module and it's
good to have such a canary in the tests no matter how the bootup process
looks like, so I'm going the masochistic route and try to maintain it.
If it *really* becomes too much maintenance burden, we can still drop or
disable kcanary.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
We already have a small regression test for #15226 within the swraid
installer test. Unfortunately, we only check there whether the md
kthread got signalled but not whether other rampaging processes are
still alive that *should* have been killed.
So in order to do this we provide multiple canary processes which are
checked after the system has booted up:
* canary1: It's a simple forking daemon which just sleeps until it's
going to be killed. Of course we expect this process to not
be alive anymore after boot up.
* canary2: Similar to canary1, but tries to mimick a kthread to make
sure that it's going to be properly killed at the end of
stage 1.
* canary3: Like canary2, but this time using a @ in front of its
command name to actually prevent it from being killed.
* kcanary: This one is a real kthread and it runs until killed, which
shouldn't be the case.
Tested with and without 67223ee and everything works as expected, at
least on my machine.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
