Hi all,
yesterday I committed the first implementation of the driver layer changes for TDMA-V2 I recently proposed. I hope I didn't break anything, but so far it works (tested with eepro100-rt and 8139too-rt).
Besides the xmit_stamp feature which is already used now by TDMA-V1, I also modified the locking scheme for the transmission routines: As TDMA and other disciplines already coordinate the transmission access on the device, there is no need for additional locks we used to have over the hard_xmit routines. We only need them now when A) the driver requests it (feature flag in the rtnet_device structure) and B) no RTmac discipline is active. We should gain a few microseconds (i.e. less CPU load) in the transmission path, but I didn't quantified it precisely.
The modifications are applied to all adapters except the infamous 3c59x-rt and the PPC drivers (maybe Wolfgang has some time besides his new tasks... ;) ). The new porting steps are documented in README.drvporting.
Jan
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