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

[Yong Zhang]

On Mon, Nov 07, 2011 at 01:30:54PM +0100, Peter Zijlstra wrote:
> 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.

Oh, my fault, the false positive warning could be "non-static key".

But seems we should find the right direction for this bug :)
Some comments in replies to patch#1.

Thanks,
Yong
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/