Re: [PATCH 1/2] locking/rwsem: Add CONFIG_RWSEM_SPIN_ON_OWNER

Jason Low
2014-06-06T17:13:12Z

On Fri, 2014-06-06 at 08:55 -0700, Davidlohr Bueso wrote:
> Just like with mutexes (CONFIG_MUTEX_SPIN_ON_OWNER),
> encapsulate the dependencies for rwsem optimistic spinning.
> No logical changes here as it continues to depend on both
> SMP and the XADD algorithm variant.
>
> Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
> ---
> include/linux/rwsem.h | 4 ++--
> kernel/Kconfig.locks | 4 ++++
> kernel/locking/rwsem.c | 2 +-
> 3 files changed, 7 insertions(+), 3 deletions(-)

Do we also want to add an #ifdef CONFIG_RWSEM_SPIN_ON_OWNER in
__init_rwsem() and in the optimistic spinning functions for rwsem-xadd?

Besides that:

Acked-by: Jason Low <jason.low2@hp.com>