Re: Fix for genalloc locking

From: Randy Dunlap
Date: Tue Oct 21 2008 - 11:40:46 EST

On Fri, 17 Oct 2008 16:43:12 +1000 Iwo Mergler wrote:

> Hi,
> I hit a little problem while using genalloc with a mix
> of interrupt/non-interrupt context. I believe the correct
> fix is to replace the locking calls with the _irqsave/_irqrestore
> variants. Patch follows.
> Is this correct?
> BTW, is there any documentation on the Lockdep warnings?
> What exactly is the meaning of {--+.} in
> (&pool->lock){--+.}, at: [<c0125d1c>] gen_pool_free+0x34/0x120

Did you read Documentation/lockdep-design.txt ?

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