[PATCH resend] UBIFS: Add log overlap assertions

[Artem Bityutskiy]

On Wed, 2014-07-30 at 10:37 +0800, hujianyang wrote:
> We use a circle area to record the log nodes in ubifs. This log area
> should not be overlapped. But after researching the code, I found
> some conditions may lead log head wraps log ltail. Although we've
> fixed the problems discovered, there may be some other issues still
> left.
> 
> This patch adds assertions where lhead changes to next leb to make
> sure ltail is not wrapped.

Pushed to linux-ubifs.

-- 
Best Regards,
Artem Bityutskiy