Aug  4 10:20:03 Horos kernel: ------------[ cut here ]------------
Aug  4 10:20:03 Horos kernel: WARNING: CPU: 3 PID: 31 at 
net/wireless/reg.c:1806
reg_process_hint+0x286/0x330 [cfg80211]()
Aug  4 10:20:03 Horos kernel: Modules linked in: af_packet snd_pcm_oss 
snd_mixer_oss
nls_iso8859_1 nls_cp850 vfat fat snd_hda_codec_realtek snd_hda_codec_generic 
snd_hda_codec_hdmi
arc4 evdev ath9k ath9k_common ath9k_hw ath psmouse led_class mac80211 k10temp 
cfg80211 rfkill
sr_mod r8169 cdrom mii 8250 serial_core snd_hda_intel snd_hda_controller 
snd_hda_codec radeon
snd_pcm drm_kms_helper button snd_timer ttm processor snd wmi soundcore drm 
i2c_piix4
i2c_algo_bit i2c_core
Aug  4 10:20:03 Horos kernel: CPU: 3 PID: 31 Comm: kworker/3:1 Not tainted 
3.16.0-00115-g19583ca
#58
Aug  4 10:20:03 Horos kernel: Hardware name: System manufacturer System 
Product Name/F2A85-M LE,
BIOS 5012 08/28/2012
Aug  4 10:20:03 Horos kernel: Workqueue: events reg_todo [cfg80211]
Aug  4 10:20:03 Horos kernel:  0000000000000000 ffff880237437d50 ffffffff8134fc09
0000000000000000
Aug  4 10:20:03 Horos kernel:  ffff880237437d88 ffffffff81036e05 ffffffffa032dc4b
ffff880235677500
Aug  4 10:20:03 Horos kernel:  ffff880235ac4240 0000000000000003 ffff88023567751c
ffff880237437d98
Aug  4 10:20:03 Horos kernel: Call Trace:
Aug  4 10:20:03 Horos kernel:  [<ffffffff8134fc09>] dump_stack+0x4d/0x6f
Aug  4 10:20:03 Horos kernel:  [<ffffffff81036e05>] warn_slowpath_common+0x75/0x8e
Aug  4 10:20:03 Horos kernel:  [<ffffffffa032dc4b>] ? reg_process_hint+0x286/0x330 
[cfg80211]
Aug  4 10:20:03 Horos kernel:  [<ffffffff81036ec2>] warn_slowpath_null+0x15/0x17
Aug  4 10:20:03 Horos kernel:  [<ffffffffa032dc4b>] reg_process_hint+0x286/0x330 
[cfg80211]
Aug  4 10:20:03 Horos kernel:  [<ffffffffa032dd70>] reg_todo+0x7b/0x157 [cfg80211]
Aug  4 10:20:03 Horos kernel:  [<ffffffff81048e92>] process_one_work+0x1ba/0x2d6
Aug  4 10:20:03 Horos kernel:  [<ffffffff81049adb>] worker_thread+0x308/0x3f5
Aug  4 10:20:03 Horos kernel:  [<ffffffff810497d3>] ? 
cancel_delayed_work_sync+0x10/0x10
Aug  4 10:20:03 Horos kernel:  [<ffffffff8104e13e>] kthread+0xdf/0xe7
Aug  4 10:20:03 Horos kernel:  [<ffffffff8104e05f>] ? 
kthread_create_on_node+0x17b/0x17b
Aug  4 10:20:03 Horos kernel:  [<ffffffff81353eec>] ret_from_fork+0x7c/0xb0
Aug  4 10:20:03 Horos kernel:  [<ffffffff8104e05f>] ? 
kthread_create_on_node+0x17b/0x17b
Aug  4 10:20:03 Horos kernel: ---[ end trace 389490cbf61b0b3c ]---



compiled using gcc-4.9.1

Motherboard: Asus F2A85-M LE

02:00.0 Network controller: Atheros Communications Inc. AR9300 Wireless LAN 
adaptor (rev 01)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI 
Express Gigabit Ethernet controller (rev 09)


full config file attached

The linux-3.15.8 kernel works