Since kernel commit 7ce2e76a0420801fb4b53b9e6850940e6b326433, ASPM
definitions have moved from linux/pci-aspm.h to linux/pci.h

In kernel commit d56c0d45f0e27f814e87a1676b6bdccccbc252e9, procfs
switched from 'struct file_operations' to 'struct proc_ops'; we need
to change DAHDI to build with those more recent kernels.

In linux kernel commit 4d659fcb20d3d3302b429c889a73a92ff2804b9a
in May 2016, netdev->trans_start was removed and write accesses
are replaced with this helper: netif_trans_update(dev)

This makes dahdi-base.c compile against kernels >= 4.7
when CONFIG_DAHDI_NET is enabled.

Signed-off-by: Harald Welte <laforge@osmocom.org>

With 5.9 the macros HAVE_UNLOCKED_IOCTL and HAVE_COMPAT_IOCTL are gone.
I didn't figured out when they were added because it predates git (2.6.12).

I don't know if there are any user or if the current dahdi driver even builds with such an old
linux kernel version.

…ulation

The HDLC encapsulation module can add its own headers and trailers to
the packet. For correct operation in this case, it is necessary to send
a packet from DAHDI to the appropriate HDLC handler. The HDLC handler,
in turn, should call the device driver procedure to transfer the packet.

Thus, for correct processing of outgoing packets, we should use function
hdlc_start_xmit from Linux HDLC stack as a ndo_start_xmit procedure.

(Note that if the protocol handler does not provide a xmit procedure,
then function hdlc_start_xmit will call the hardware driver directly.)

In the case of DAHDI, the packet transfer procedure (device driver xmit
procedure) is set in function dahdi_ioctl_chanconfig to dahdi_xmit:

    dev_to_hdlc(chan->hdlcnetdev->netdev)->xmit = dahdi_xmit;

Asterisk-Issue: DAHLIN-381

Ever since commit ad7eab2ab014748b062507b7ac69f8e856057717
"net: split out ndo_siowandev ioctl" has been merged in 5.15-rc1,
DAHDI failed to compile with DAHDI_NET enabled due to slight differences
in handling the HDLC/WAN device related ioctl.

Signed-off-by: Harald Welte <laforge@gnumonks.org>