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Ideally we want to standardize on storing all timestamps derivied from the
system clock as ktime_t values.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

`struct timeval` has been removed from the kernel interface in 5.0 as
part of fixing the 2038 problem. ktime_t is the preferred kernel time
interface now.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

Older kernels (2.6.32) are unable to do a direct comparison of ktime
values, while kernels post 4.10 have removed the comparison function.
Therefore we need to make our own compatibility interface for comparing
the ktime values.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

Use the new ktime_t based interface for dahdi_dummy as well. dahdi_dummy
is still useful to keep around for testing purposes.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

It looked like the recent change to add support for timer_setup was not
completely implemented / tested with dahdi_dummy. I was using it to
check some changes to the timekeeping API when I noticed this.

This does not really affect anyone since, by default, dahdi_dummy is no
longer built and even if it was built, it would not use the standard
timer interface by default on newer kernels.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

Since this is only used internally, and ktime is the basis for
timekeeping in the kernel, this allows this interface to be validated,
before converting the other internal timekeeping to it.

This is part of the changes necessary to remove the use of 'struct
timeval' from the driver suite for compatibility with Linux 5.0, which
is updating the internal timekeeping interfaces to fix the 2038 problem.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

The timeval structure is removed in Linux kernel 5.0 since it is not
year 2038 safe. Standardize on the ktime values.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

This function will return the number of milliseconds between two ktime
values, but it was only introduced in kernel version 4.0
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

The SUBDIRS environment variable is scheduled to be removed in version
5.0 of the Linux Kernel.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

All supported kernel versions use the same signature for device_create /
device_destroy so we no longer need these macros.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

ENABLE_WORKQUEUE was only defined for kernels that were older than the
currently supported kernels. Instead of forward porting support for
workqueues in the wct4xxp driver, I think it better just to remove
support for them since they are not longer used.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

All supported kernel variations support the same signature for
registering a PCI module, so we can eliminate the macro.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

All supported kernels now use the same signature for the IRQ handler.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

There are not any major distributions that are still supporting kernels
older than 2.6.27 so we can remove many typedefs. The primary motivator
for this change is that kernel 5.0 is dropping support for timeval and
it would be ideal if the in-kernel time representation can
standardize on ktime_t, but 2.6.18 did not support the ktime
interface that was needed.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

Since Red Hat Linux backported the new timer_setup definition in 7.6, we
need to make sure to not define it ourselves when building against this
kernel.
Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

add them back.
This reverts commit a36d2662.

Author: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Bug: https://issues.asterisk.org/jira/browse/DAHLIN-364

Upstream kernel 4.14, in commit (686fef928bba6b "timer: Prepare to change timer
callback argument type") [1], introduced the timer_setup interface to replace
the init_timer/setup_timer interfaces. The primary change is that the timer
callback functions now follow the standard kernel pattern where the structure
the callback sits in is passed to the callback instead of storing a pointer to
an unassociated data type.

The setup_timer functions were removed in upstream kernel v4.15, and therefore
this change is needed in order to compile DAHDI for kernels >= 4.15.

This change follows the same strategy that was done in the kernel to while the
existing users of setup_timer were migrated to the new interface.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=686fef928bba6b

GCC 7.3.0 complained about the potential to overflow the fixed size span and
channel names and descriptions. It also flagged potential truncations of the
strings.

The sprintf calls are now changed to snprintf to prevent the potential
overflows, but the warning about truncations are now disabled globally.

Quiets the following (valid) warning from gcc 7.3.0:

drivers/dahdi/voicebus/GpakApi.c:1648:22: warning: ‘MsgBuffer[1]’ may be used
   uninitialized in this function [-Wmaybe-uninitialized]
         MsgBuffer[1] |= DTMF_UPDATE_MASK;

This quiets the following warning from gcc 7.3.0:

  drivers/dahdi/xpp/card_fxs.c:1344:17: warning: increment of a boolean
  	expression [-Wbool-operation]

This fixes an error and quiets the following warning pointed out by gcc 7.3.0:

  warning: ‘memset’ used with length equal to number of elements without
    multiplication by element size [-Wmemset-elt-size] memset(chan->conflast, 0,
    DAHDI_MAX_CHUNKSIZE);

Previously only the first half of the conference buffers were cleared out.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

* The variable eeprom_release_201 was added in the initialization
  script of the FXS module to add a case where it is different from
  101 mains.
* However, it tests for "201" and it should apply for any 20x.
* Remove the variable from the init script of module type 6 (new FXS)
  as it was not used.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

Debian packaging uses quilt to manage patches. Book-keeping for them is
done using quilt (either directly, or in a compatible format), and
tracked in the directory .pc .
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

dev_attrs was removed from struct bus_type on kernel 4.13, need to
convert to dev_groups, see
http://lkml.iu.edu/hypermail/linux/kernel/1706.0/04578.html

.

DAHLIN-356 #close
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>