Re: [patch] 2.4.4 alpha semaphores optimization

Richard Henderson
2001-05-04T21:13:52Z

On Thu, May 03, 2001 at 07:47:47PM +0400, Ivan Kokshaysky wrote:
> - removed some mb's for non-SMP

This isn't correct. Either you need atomic updates or you don't.
If you don't, then you shouldn't be using ll/sc at all. If you do
(perhaps to coordinate with devices) then the barriers are required.

> - removed non-inline up()/down_xx() when semaphore/waitqueue debugging
> isn't enabled.

They should still be exported for module compatibility.

r~