[NETPOLL]: rx_flags bugfix

Initialize npinfo->rx_flags.  The way it stands now, this will have random
garbage, and so will incur a locking penalty even when an rx_hook isn't
registered and we are not active in the netpoll polling code.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index c327c9edadc57f23fba034059232fcbab08c4fc8..895f3efc65aac7e5ee2c1dc9425af42d3e71d839 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -639,6 +639,7 @@ int netpoll_setup(struct netpoll *np)
                if (!npinfo)
                        goto release;
 
+               npinfo->rx_flags = 0;
                npinfo->rx_np = NULL;
                npinfo->poll_lock = SPIN_LOCK_UNLOCKED;
                npinfo->poll_owner = -1;