Re: [RFC PATCH 4/4] lockdep: fix race condition in__lock_set_class()

[Peter Zijlstra]

On Fri, 2011-11-04 at 17:26 +0800, Yong Zhang wrote:
> When someone call lock_set_class() with valid key, nothing
> protect the initializing of 'lockdep_map'; thus could lead
> to flase positive warning from lockdep (such as "key not in
> .data!"). This patch cure that potential issue.

How? that warning is triggered of the lock_class_key * passed into
lockdep_init_map and is unrelated to the actual content of the
lockdep_map.


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