[patch] turn on might_sleep() in early bootup code too

[Nick Piggin]

Andrew Morton wrote:
> Ingo Molnar <mingo at elte.hu> wrote:
> 
>> enable might_sleep() checks even in early bootup code (when system_state 
>> != SYSTEM_RUNNING). There's also a new config option to turn this off:
>> CONFIG_DEBUG_SPINLOCK_SLEEP_EARLY_BOOTUP_WORKAROUND
>> while most other architectures.
> 
> 
> I get just the one on ppc64:
> 
> 
> Debug: sleeping function called from invalid context at include/asm/semaphore.h:62
> in_atomic():1, irqs_disabled():1
> Call Trace:
> [C0000000004EFD20] [C00000000000F660] .show_stack+0x5c/0x1cc (unreliable)
> [C0000000004EFDD0] [C000000000053214] .__might_sleep+0xbc/0xe0
> [C0000000004EFE60] [C000000000413D1C] .lock_kernel+0x50/0xb0
> [C0000000004EFEF0] [C0000000004AC574] .start_kernel+0x1c/0x278
> [C0000000004EFF90] [C0000000000085D4] .hmt_init+0x0/0x2c
> 
> 
> Your fault ;)

This lock_kernel should never sleep should it? Maybe it could be changed
to lock_kernel_init_locked() or something?

-- 
SUSE Labs, Novell Inc.
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