Hi,
I want to test the new batman V with throughput based metric, but I could not find out how to compile batman-adv against cfg80211 from linux backports.
At the moment first I am compiling cfg80211 and ath10k from the backports tree. After that I manually copy the created Modules.symvers from backports build dir to the batman-adv folder and running make with KBUILD_EXTRA_SYMBOLS, because otherwise I am getting a warning that the cfg80211_get_station symbol is missing.
Then batman-adv compiles fine. After loading the module I am getting an error with batadv_v_elp_throughput_metric_update :
[ 150.332710] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 150.341079] pgd = 80004000 [ 150.343900] [00000000] *pgd=00000000 [ 150.347735] Internal error: Oops: 80000007 [#1] SMP ARM [ 150.347768] Modules linked in: batman_adv(O) bluetooth 6lowpan_iphc arc4 sky2 ath10k_pci(O) ath10k_core(O) ath(O) mac80211(O) ftdi_sio usbserial cfg80211(O) compat(O) [ 150.347779] CPU: 0 PID: 21 Comm: kworker/u4:1 Tainted: G O 3.14.48+yocto+g36eba1d #1 [ 150.347836] Workqueue: bat_events batadv_v_elp_throughput_metric_update [batman_adv] [ 150.347841] task: 9c0c5f80 ti: 9c1e4000 task.ti: 9c1e4000 [ 150.347848] PC is at 0x0 [ 150.347851] LR is at 0x0 [ 150.347857] pc : [<00000000>] lr : [<00000000>] psr: 20070013 [ 150.347857] sp : 9c1e5f08 ip : 0000001e fp : 9c004400 [ 150.347861] r10: 9c1e4008 r9 : 00000000 r8 : 9c004400 [ 150.347865] r7 : 00000000 r6 : 9de20500 r5 : 00000002 r4 : 9c1bc980 [ 150.347868] r3 : 96a0ee38 r2 : 00000001 r1 : 00000000 r0 : 96a0ee00 [ 150.347874] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 150.347878] Control: 10c53c7d Table: 2697804a DAC: 00000015 [ 150.347882] Process kworker/u4:1 (pid: 21, stack limit = 0x9c1e4238) [ 150.347886] Stack: (0x9c1e5f08 to 0x9c1e6000)
Regards Hannes