panic: mutex Giant owned at /usr/src/sys/kern/kern_synch.c:400
cpuid = 8
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe10463674f0
vpanic() at vpanic+0x182/frame 0xfffffe1046367570
panic() at panic+0x43/frame 0xfffffe10463675d0
__mtx_assert() at __mtx_assert+0xd3/frame 0xfffffe10463675e0
mi_switch() at mi_switch+0x7b/frame 0xfffffe1046367610
sleepq_switch() at sleepq_switch+0xe7/frame 0xfffffe1046367650
sleepq_wait() at sleepq_wait+0x43/frame 0xfffffe1046367680
linux_wait_for_common() at linux_wait_for_common+0x95/frame 0xfffffe10463676b0
cma_remove_one() at cma_remove_one+0x2cd/frame 0xfffffe1046367770
ib_unregister_device() at ib_unregister_device+0x57/frame 0xfffffe10463677a0
c4iw_unregister_device() at c4iw_unregister_device+0xe/frame 0xfffffe10463677c0
c4iw_deactivate() at c4iw_deactivate+0x5d/frame 0xfffffe10463677f0
t4_deactivate_uld() at t4_deactivate_uld+0xa4/frame 0xfffffe1046367820
c4iw_deactivate_all() at c4iw_deactivate_all+0x45/frame 0xfffffe1046367840
t4_iterate() at t4_iterate+0x49/frame 0xfffffe1046367870
c4iw_modevent() at c4iw_modevent+0x31/frame 0xfffffe1046367890
module_unload() at module_unload+0x32/frame 0xfffffe10463678b0
linker_file_unload() at linker_file_unload+0x24b/frame 0xfffffe1046367900
kern_kldunload() at kern_kldunload+0xbc/frame 0xfffffe1046367930
amd64_syscall() at amd64_syscall+0x314/frame 0xfffffe1046367ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe1046367ab0
--- syscall (444, FreeBSD ELF64, sys_kldunloadf), rip = 0x80086d10a, rsp = 0x7fffffffe328, rbp = 0x7fffffffeb90 ---
KDB: enter: panic