Resolve "review vaibhav patches"

Closes #1

See merge request be-cem-edl/fec/hardware-modules/zio!1

The makefile inside 'tools' directory already has a default value of
'M'.
Reported-by: Federico Vaga <federico.vaga@cern.ch>
Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Linux being an object orientd code, reuses the code wherever possible.
Thus, there are cases where two completely independent and different
structures might have a member which has same structure template.

For example, in objects.c, in function "__ti_create",
	- trig->head.name, and
	- cset->zdev->head.name

are of same type, but belong to different structures. And when the code
tries to copy/ write one into another, we get truncation warning.

And in this case we cannot even increase the size of only one, because
both the members are created from same structure.

Thus, one good solution is to not to treat those warnings as errors.
Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Variable name 'LINUX' is very ambiguous for its purpose in the makefile.
Also, this project builds as a part of COHT project which uses another
variable name 'KERNELSRC' for the same purpose. Hence, this change makes
this project uniform with others.
Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

`struct timespec` is no longer available from headers after kernel 5.6.
It is now required to use `struct timespec64`, which uses a 64bit
integer for seconds instead of the former 32bit.

The function `timespec_to_ktime` becomes `timespec64_to_ktime`

The function `getnstimeofday` becomes `ktime_get_real_ts64`
Signed-off-by: Gwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: Mathis MARION <mathis.marion@grenoble-inp.org>

At some point I renamed doc into Documentation but there are projects
out there who test the presence of doc/ to build 'zio'.

We should fix the Makefile in all these projects but right now it is not
that easy and this is the easiest fix to make the CERN COHT building mechanism
working again.
Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Like this other modules can use it when they depends on ZIO
Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Because version tag format changed
Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

It makes the code compiling and running on modern kernels

zio: drivers: zio-vmk8055: use timer_setup instead of setup_timer with kernel > 4.15, add dedicated callback

Since 4.15 timer callback take a struct timer_list argument instead of
unsigned long.
This patch split zvmk80xx_send_urb (timer callback) to a common function
(__zvmk80xx_send_urb) with a struct zvmk80xx_cset parameter and two
dedicated function according to kernel version. Since the signature of the
common function has changed, call in zvmk80xx_generic_raw_io is updated too
to suppress cast zvmk80xx_cset -> unsigned long.
Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> (CERN)

zio:triggers:zio-trig-timer: use timer_setup instead of setup_timer with kernel > 4.15, adapt callback
Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> (CERN)