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

From: Peter Zijlstra
Date: Mon Apr 07 2014 - 04:14:01 EST

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.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at