| commit | 2b6e72ed747f68a038df616efd86744b3644d694 | [log] [tgz] |
|---|---|---|
| author | Dominique Martinet <dominique.martinet@cea.fr> | Fri Jan 17 18:31:00 2014 +0100 |
| committer | Eric Van Hensbergen <ericvh@gmail.com> | Tue Mar 25 16:37:59 2014 -0500 |
| tree | d781427484432608a74ccc44fd4a7a3296751f23 | |
| parent | 38dbfb59d1175ef458d006556061adeaa8751b72 [diff] |
9P: Add memory barriers to protect request fields over cb/rpc threads handoff We need barriers to guarantee this pattern works as intended: [w] req->rc, 1 [r] req->status, 1 wmb rmb [w] req->status, 1 [r] req->rc Where the wmb ensures that rc gets written before status, and the rmb ensures that if you observe status == 1, rc is the new value. Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>