[Devel] [PATCH -mm 2/3] lockdep: mark rwsem_acquire_read as recursive

[Peter Zijlstra]

On Sun, Apr 06, 2014 at 07:33:51PM +0400, Vladimir Davydov wrote:
> rw_semaphore implementation allows recursing calls to down_read, but
> lockdep thinks that it doesn't. As a result, it will complain
> false-positively, e.g. if we do not observe some predefined locking
> order when taking an rw semaphore for reading and a mutex.
> 
> This patch makes lockdep think rw semaphore is read-recursive, just like
> rw spin lock.

Uhm no rwsem isn't read recursive.