linux-next: boot failure in next-20120705 and 20120706

[Stephen Rothwell]

Hi all,

Boot testing next-20120705 and 20120706 one of my PowerPC machines get this BUG:

(this one just after the console login prompt appeared.)

kernel BUG at arch/powerpc/kernel/irq.c:188!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=32 NUMA pSeries
Modules linked in: binfmt_misc dm_mirror dm_region_hash dm_log ibmveth
NIP: c00000000000f7d4 LR: c00000000000f838 CTR: c0000000007222a0
REGS: c000000000d17a30 TRAP: 0700   Not tainted  (3.5.0-rc5-autokern1)
MSR: 8000000000021032 <SF,ME,IR,DR,RI>  CR: 24000048  XER: 00000000
SOFTE: 0
TASK = c000000000c41a10[0] 'swapper/0' THREAD: c000000000d14000 CPU: 0
GPR00: 0000000000000001 c000000000d17cb0 c000000000d12d10 0000000000000500 
GPR04: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR08: 001752557ab9dd5b c000000007ffb000 0000000000000000 c000000000bf5200 
GPR12: 0000000000000000 c000000007ffb000 0000000002b00000 00000000009d7000 
GPR16: 0000000000d454f0 00000000027dc6f0 0000000001b5f994 0000000000000060 
GPR20: 0000000000000000 ffffffffffffffff ffffffffffffffff 8000000000009032 
GPR24: c000000000d14000 c000000000d30290 c000000000d30178 c000000000d30290 
GPR28: c0000000008a6180 0000000000000008 c000000000c7e130 0000000000000001 
NIP [c00000000000f7d4] .__check_irq_replay+0xc4/0xf0
LR [c00000000000f838] .arch_local_irq_restore+0x38/0x90
Call Trace:
[c000000000d17cb0] [c000000000d17d30] init_thread_union+0x3d30/0x4000 (unreliable)
[c000000000d17d40] [c00000000000f838] .arch_local_irq_restore+0x38/0x90
[c000000000d17db0] [c000000000015c60] .cpu_idle+0x230/0x2b0
[c000000000d17e70] [c00000000000b3f8] .rest_init+0x88/0xa0
[c000000000d17ef0] [c000000000b86c0c] .start_kernel+0x478/0x498
[c000000000d17f90] [c0000000000096f8] .start_here_common+0x20/0x28
Instruction dump:
4e800020 7da96b78 7beaf7e3 880901f3 38600500 5400e87e 5400183e 980901f3 
4082ffcc 880d01f3 7c0000d0 78000fe0 <0b000000> 38600000 4bffffb4 38610070 

This is:
	BUG_ON(local_paca->irq_happened != 0);
in __check_irq_replay().

This only happens on my Power5+ machine.
-- 
Cheers,
Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx

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