9p: Fix comment on smp_wmb

The previous comment misled me into thinking the barrier wasn't needed
at all.

Link: http://lkml.kernel.org/r/20180711210225.19730-2-willy@infradead.org
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>

diff --git a/net/9p/client.c b/net/9p/client.c
index dd461c7..cae1fb4 100644 (file)
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -448,7 +448,7 @@ void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status)
 
        /*
         * 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.
+        * the status change is visible to another thread
         */
        smp_wmb();
        req->status = status;