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Groups > linux.kernel > #1550373 > unrolled thread
| Started by | Christian Kujau <lists@nerdbynature.de> |
|---|---|
| First post | 2017-01-04 03:20 +0100 |
| Last post | 2017-01-04 11:20 +0100 |
| Articles | 2 — 2 participants |
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DEBUG_LOCKS_WARN_ON(1) / lockdep.c:3134 lockdep_init_map+0x1e8/0x1f0 Christian Kujau <lists@nerdbynature.de> - 2017-01-04 03:20 +0100
Re: DEBUG_LOCKS_WARN_ON(1) / lockdep.c:3134 lockdep_init_map+0x1e8/0x1f0 Peter Zijlstra <peterz@infradead.org> - 2017-01-04 11:20 +0100
| From | Christian Kujau <lists@nerdbynature.de> |
|---|---|
| Date | 2017-01-04 03:20 +0100 |
| Subject | DEBUG_LOCKS_WARN_ON(1) / lockdep.c:3134 lockdep_init_map+0x1e8/0x1f0 |
| Message-ID | <sVJlf-6Dy-1@gated-at.bofh.it> |
Hi, booting v4.10-rc2 on this PowerPC G4 machine prints the following early on, but then continues to boot and the machine is running fine so far: BUG: key ef0ba7d0 not in .data! DEBUG_LOCKS_WARN_ON(1) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at /usr/local/src/linux-git/kernel/locking/lockdep.c:3134 lockdep_init_map+0x1e8/0x1f0 Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 4.10.0-rc2 #4 task: ef04aa60 task.stack: ef042000 NIP: c005eb78 LR: c005eb78 CTR: 00000000 REGS: ef043d70 TRAP: 0700 Not tainted (4.10.0-rc2) MSR: 02029032 <VEC,EE,ME,IR,DR,RI> CR: 48000022 XER: 20000000 GPR00: c005eb78 ef043e20 ef04aa60 00000016 00000001 c0068b24 00000000 00000001 GPR08: 00000000 00000000 00004ead 000000d6 28000024 00000000 c00047f0 00000000 GPR16: 00000000 00000000 c08b9280 effedfa0 c078d6ac c1070000 c078eddc c078ee14 GPR24: c078ed24 c078ee24 00000002 ef085a00 00000000 c08b0000 ef0ba7d0 ef0ba7b4 NIP [c005eb78] lockdep_init_map+0x1e8/0x1f0 LR [c005eb78] lockdep_init_map+0x1e8/0x1f0 Call Trace: [ef043e20] [c005eb78] lockdep_init_map+0x1e8/0x1f0 (unreliable) [ef043e40] [c083adb4] kw_i2c_add+0xc0/0x134 [ef043e60] [c083b29c] pmac_i2c_init+0x3b8/0x518 [ef043ea0] [c00040c0] do_one_initcall+0x40/0x174 [ef043f00] [c0834064] kernel_init_freeable+0x134/0x1cc [ef043f30] [c0004808] kernel_init+0x18/0x110 [ef043f40] [c0010ad8] ret_from_kernel_thread+0x5c/0x64 Instruction dump: 4837259d 2f830000 41befec0 3d20c08b 812953a0 2f890000 409efeb0 3c60c079 3c80c07b 3884b48c 3863f9e4 4860d52d <0fe00000> 4bfffe94 9421ff70 7c0802a6 ---[ end trace 8a79d8041d87d000 ]--- Full dmesg and .config: http://nerdbynature.de/bits/4.10-rc2/ Thanks for listening, Christian. -- BOFH excuse #409: The vulcan-death-grip ping has been applied.
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| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Date | 2017-01-04 11:20 +0100 |
| Message-ID | <sVQPL-3lt-9@gated-at.bofh.it> |
| In reply to | #1550373 |
On Tue, Jan 03, 2017 at 06:11:20PM -0800, Christian Kujau wrote:
> Hi,
>
> booting v4.10-rc2 on this PowerPC G4 machine prints the following early
> on, but then continues to boot and the machine is running fine so far:
>
>
> BUG: key ef0ba7d0 not in .data!
> DEBUG_LOCKS_WARN_ON(1)
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 1 at
> /usr/local/src/linux-git/kernel/locking/lockdep.c:3134 lockdep_init_map+0x1e8/0x1f0
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper Not tainted 4.10.0-rc2 #4
> task: ef04aa60 task.stack: ef042000
> NIP: c005eb78 LR: c005eb78 CTR: 00000000
> REGS: ef043d70 TRAP: 0700 Not tainted (4.10.0-rc2)
> MSR: 02029032 <VEC,EE,ME,IR,DR,RI>
> CR: 48000022 XER: 20000000
> GPR00: c005eb78 ef043e20 ef04aa60 00000016 00000001 c0068b24 00000000 00000001
> GPR08: 00000000 00000000 00004ead 000000d6 28000024 00000000 c00047f0 00000000
> GPR16: 00000000 00000000 c08b9280 effedfa0 c078d6ac c1070000 c078eddc c078ee14
> GPR24: c078ed24 c078ee24 00000002 ef085a00 00000000 c08b0000 ef0ba7d0 ef0ba7b4
> NIP [c005eb78] lockdep_init_map+0x1e8/0x1f0
> LR [c005eb78] lockdep_init_map+0x1e8/0x1f0
> Call Trace:
> [ef043e20] [c005eb78] lockdep_init_map+0x1e8/0x1f0 (unreliable)
> [ef043e40] [c083adb4] kw_i2c_add+0xc0/0x134
Commit 9e607f72748d ("i2c_powermac: shut up lockdep warning") it utter
crap and should never have been merged.
/me glares at mpe, why do you merge things that state: 'its unclear
why, just make it go-away' wrt to locking?
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