summaryrefslogtreecommitdiff
path: root/include/net/9p
diff options
context:
space:
mode:
authorDominique Martinet <dominique.martinet@cea.fr>2014-01-17 18:31:00 +0100
committerEric Van Hensbergen <ericvh@gmail.com>2014-03-25 16:37:59 -0500
commit2b6e72ed747f68a038df616efd86744b3644d694 (patch)
treed781427484432608a74ccc44fd4a7a3296751f23 /include/net/9p
parent38dbfb59d1175ef458d006556061adeaa8751b72 (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>
Diffstat (limited to 'include/net/9p')
-rw-r--r--include/net/9p/client.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index c38a005bd0cf..115aeac401b1 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -261,7 +261,7 @@ int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status);
int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl);
struct p9_req_t *p9_tag_lookup(struct p9_client *, u16);
-void p9_client_cb(struct p9_client *c, struct p9_req_t *req);
+void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status);
int p9_parse_header(struct p9_fcall *, int32_t *, int8_t *, int16_t *, int);
int p9stat_read(struct p9_client *, char *, int, struct p9_wstat *);