And add a comment about why we don't need it.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
---
net/9p/client.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/net/9p/client.c b/net/9p/client.c
index 602f76de388a..2dce8d8307cc 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -436,13 +436,9 @@ void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status)
{
p9_debug(P9_DEBUG_MUX, " tag %d\n", req->tc->tag);
- /*
- * This barrier is needed to make sure any change made to req before
- * the other thread wakes up will indeed be seen by the waiting side.
- */
- smp_wmb();
req->status = status;
+ /* wake_up is an implicit write memory barrier */
wake_up(&req->wq);
p9_debug(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
}
--
2.18.0
