pi@pi ~ $ uname -a
Linux pi 3.12.36+ #737 PREEMPT Wed Jan 14 19:40:07 GMT 2015 armv6l GNU/Linux

Feb 27 19:33:22 pi kernel: [169472.321768] Modules linked in: snd_bcm2835 snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer snd pl2303 usbserial leds_gpio led_class spi_bcm2708
Feb 27 19:33:22 pi kernel: [169472.339986] CPU: 0 PID: 2472 Comm: node Not tainted 3.12.36+ #737
Feb 27 19:33:22 pi kernel: [169472.347687] task: d6178c80 ti: d61ee000 task.ti: d61ee000
Feb 27 19:33:22 pi kernel: [169472.354723] PC is at vfp_save_state+0x0/0x28
Feb 27 19:33:22 pi kernel: [169472.360637] LR is at vfp_sync_hwstate+0x70/0x7c
Feb 27 19:33:22 pi kernel: [169472.366797] pc : [<c00099c4>]    lr : [<c0009588>]    psr: 60000013
Feb 27 19:33:22 pi kernel: [169472.366797] sp : d61efeb0  ip : 00000018  fp : beb11de0
Feb 27 19:33:22 pi kernel: [169472.381537] r10: 01771044  r9 : d6179028  r8 : 00000000
Feb 27 19:33:22 pi kernel: [169472.388375] r7 : d61effb0  r6 : beb11cd0  r5 : 80000780  r4 : d61ee030
Feb 27 19:33:22 pi kernel: [169472.396549] r3 : d61ee0f8  r2 : c062ce60  r1 : c0000780  r0 : d61ee0f8
Feb 27 19:33:22 pi kernel: [169472.404701] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Feb 27 19:33:22 pi kernel: [169472.414917] Control: 00c5387d  Table: 16140008  DAC: 00000015
Feb 27 19:33:22 pi kernel: [169472.563714] [<c00099c4>] (vfp_save_state+0x0/0x28) from [<c0009588>] (vfp_sync_hwstate+0x70/0x7c)
Feb 27 19:33:22 pi kernel: [169472.576493] [<c0009588>] (vfp_sync_hwstate+0x70/0x7c) from [<c0009794>] (vfp_preserve_user_clear_hwstate+0x20/0x8c)
Feb 27 19:33:22 pi kernel: [169472.590885] [<c0009794>] (vfp_preserve_user_clear_hwstate+0x20/0x8c) from [<c0010a8c>] (setup_sigframe+0x190/0x1a0)
Feb 27 19:33:22 pi kernel: [169472.605262] [<c0010a8c>] (setup_sigframe+0x190/0x1a0) from [<c0010ee8>] (do_signal+0x2e8/0x440)
Feb 27 19:33:22 pi kernel: [169472.617874] [<c0010ee8>] (do_signal+0x2e8/0x440) from [<c00111d8>] (do_work_pending+0xa4/0xb4)
Feb 27 19:33:22 pi kernel: [169472.630384] [<c00111d8>] (do_work_pending+0xa4/0xb4) from [<c000df00>] (work_pending+0xc/0x20)
Feb 27 19:33:23 pi kernel: [169472.661933] ---[ end trace ca4423d502cf7049 ]---
Feb 27 19:33:23 pi kernel: [169472.675291] note: node[2472] exited with preempt_count 2
Feb 27 19:33:23 pi kernel: [169472.705002] Modules linked in: snd_bcm2835 snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer snd pl2303 usbserial leds_gpio led_class spi_bcm2708
Feb 27 19:33:23 pi kernel: [169472.748913] CPU: 0 PID: 2472 Comm: node Tainted: G      D      3.12.36+ #737
Feb 27 19:33:23 pi kernel: [169472.776293] [<c00143d4>] (unwind_backtrace+0x0/0xec) from [<c00116b8>] (show_stack+0x10/0x14)
Feb 27 19:33:23 pi kernel: [169472.805157] [<c00116b8>] (show_stack+0x10/0x14) from [<c04459b8>] (__schedule_bug+0x48/0x64)
Feb 27 19:33:23 pi kernel: [169472.833943] [<c04459b8>] (__schedule_bug+0x48/0x64) from [<c044aebc>] (__schedule+0x518/0x5ac)
Feb 27 19:33:23 pi kernel: [169472.862904] [<c044aebc>] (__schedule+0x518/0x5ac) from [<c0045758>] (__cond_resched+0x24/0x34)
Feb 27 19:33:23 pi kernel: [169472.891872] [<c0045758>] (__cond_resched+0x24/0x34) from [<c044b6c4>] (_cond_resched+0x3c/0x44)
Feb 27 19:33:23 pi kernel: [169472.920995] [<c044b6c4>] (_cond_resched+0x3c/0x44) from [<c00c3004>] (__get_user_pages.part.91+0xa0/0x408)
Feb 27 19:33:23 pi kernel: [169472.950871] [<c00c3004>] (__get_user_pages.part.91+0xa0/0x408) from [<c00b8214>] (get_user_pages_fast+0x60/0x78)
Feb 27 19:33:23 pi kernel: [169472.981397] [<c00b8214>] (get_user_pages_fast+0x60/0x78) from [<c0065af8>] (get_futex_key+0xec/0x244)
Feb 27 19:33:23 pi kernel: [169473.010922] [<c0065af8>] (get_futex_key+0xec/0x244) from [<c0065d00>] (futex_wake+0x30/0x160)
Feb 27 19:33:23 pi kernel: [169473.039707] [<c0065d00>] (futex_wake+0x30/0x160) from [<c0067e0c>] (do_futex+0x120/0xb78)
Feb 27 19:33:23 pi kernel: [169473.068342] [<c0067e0c>] (do_futex+0x120/0xb78) from [<c00688e4>] (SyS_futex+0x80/0x160)
Feb 27 19:33:23 pi kernel: [169473.097280] [<c00688e4>] (SyS_futex+0x80/0x160) from [<c001d328>] (mm_release+0xfc/0x138)
Feb 27 19:33:23 pi kernel: [169473.126477] [<c001d328>] (mm_release+0xfc/0x138) from [<c0021774>] (do_exit+0x110/0x970)
Feb 27 19:33:23 pi kernel: [169473.155673] [<c0021774>] (do_exit+0x110/0x970) from [<c00119f0>] (die+0x334/0x390)
Feb 27 19:33:23 pi kernel: [169473.184507] [<c00119f0>] (die+0x334/0x390) from [<c0008334>] (do_undefinstr+0x1b0/0x1dc)
Feb 27 19:33:23 pi kernel: [169473.213890] [<c0008334>] (do_undefinstr+0x1b0/0x1dc) from [<c044d0ec>] (__und_svc_finish+0x0/0x34)
Feb 27 19:33:23 pi kernel: [169473.244100] Exception stack(0xd61efe28 to 0xd61efe70)
Feb 27 19:33:23 pi kernel: [169473.259851] fe20:                   d61ee0f8 c0000780 c062ce60 d61ee0f8 d61ee030 80000780
Feb 27 19:33:23 pi kernel: [169473.288918] fe40: beb11cd0 d61effb0 00000000 d6179028 01771044 beb11de0 00000018 d61efeb0
Feb 27 19:33:23 pi kernel: [169473.317875] fe60: c0009588 c00099c4 60000013 ffffffff
Feb 27 19:33:23 pi kernel: [169473.333576] [<c044d0ec>] (__und_svc_finish+0x0/0x34) from [<c00099c4>] (vfp_save_state+0x0/0x28)
Feb 27 19:33:23 pi kernel: [169473.363003] [<c00099c4>] (vfp_save_state+0x0/0x28) from [<c0009588>] (vfp_sync_hwstate+0x70/0x7c)
Feb 27 19:33:23 pi kernel: [169473.392348] [<c0009588>] (vfp_sync_hwstate+0x70/0x7c) from [<c0009794>] (vfp_preserve_user_clear_hwstate+0x20/0x8c)
Feb 27 19:33:23 pi kernel: [169473.423359] [<c0009794>] (vfp_preserve_user_clear_hwstate+0x20/0x8c) from [<c0010a8c>] (setup_sigframe+0x190/0x1a0)
Feb 27 19:33:23 pi kernel: [169473.454368] [<c0010a8c>] (setup_sigframe+0x190/0x1a0) from [<c0010ee8>] (do_signal+0x2e8/0x440)
Feb 27 19:33:23 pi kernel: [169473.483620] [<c0010ee8>] (do_signal+0x2e8/0x440) from [<c00111d8>] (do_work_pending+0xa4/0xb4)
Feb 27 19:33:23 pi kernel: [169473.512866] [<c00111d8>] (do_work_pending+0xa4/0xb4) from [<c000df00>] (work_pending+0xc/0x20)