Messages in this thread | | | Date | Thu, 23 Jan 2014 09:52:25 -0800 | Subject | Re: [PATCH v10 1/4] qrwlock: A queue read/write lock implementation | From | Linus Torvalds <> |
| |
On Thu, Jan 23, 2014 at 9:47 AM, Waiman Long <waiman.long@hp.com> wrote: > > Thank for the info. I am less familiar with that kind of issues on other > architecture. I will add a smp_mb__after_atomic_dec() & send out a new > patch.
SInce it's the unlock path,. you need to use the "mb__*before*" versions, since presumably you want to protect what is inside the lock from leaking out, not some random thing after the lock from leaking in..
Linus
| |