Re: [PATCH 4/4][diskdump] x86-64 support

[Christoph Hellwig]

On Tue, Aug 31, 2004 at 06:10:40PM +0900, Takao Indoh wrote:
> >a spin_trylock would be safe.  hd can't be NULL.
> 
> Could you explain to me why spin_is_locked is not safe?

it's inherently racy.  Also it's always return 0 on UP systems which
makes it totally useless there.

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