[PowerPC][next-20170324][kselftest] kernel Oops when running tm/tm-signal-context-chk-vsx

[Denis Kirjanov]

[  283.516559] Kernel BUG at c00000000191c160 [verbose debug info unavailable]
[  283.516573] Unexpected TM Bad Thing exception at c00000000191c160
(msr 0x2a03030)
cpu 0x19: Vector: 700 (Program Check) at [c0000007d1a37920]
    pc: c00000000191c160: fast_exception_return+0xac/0xb4
    lr: c000000001925ed4: .arch_local_irq_restore.part.10+0x74/0xa0
    sp: c0000007d1a37ba0
   msr: 9000000302a03030
  current = 0xc0000007d094c000
  paca    = 0xc00000000fffd980	 softe: 0	 irq_happened: 0x01
    pid   = 7804, comm = tm-signal-conte
Linux version 4.12.0-rc2 (root at power.oil.ru) (gcc version 4.8.3
20140911 (Red Hat 4.8.3-9) (GCC) ) #31 SMP PREEMPT Thu May 25 07:22:54
EDT 2017
WARNING: exception is not recoverable, can't continue
enter ? for help
[link register   ] c000000001925ed4 .arch_local_irq_restore.part.10+0x74/0xa0
[c0000007d1a37ba0] c000000001925ea0
.arch_local_irq_restore.part.10+0x40/0xa0 (unreliable)
[c0000007d1a37c10] c000000001a565f0 .lock_acquire+0x100/0x340
[c0000007d1a37cf0] c000000001b8fb44 .__might_fault+0x74/0xb0
[c0000007d1a37d60] c00000000193cd60 .sys_rt_sigreturn+0x9e0/0xb70
[c0000007d1a37e30] c00000000191b9ec system_call+0x38/0xfc
--- Exception: c01 (System Call) at 0000000010001c38
SP (7fffddb2dd60) is in userspace

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