Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  pcnet32: remove private net_device_stats structure
  vortex_up should initialize "err"
  pcnet32: remove compile warnings in non-napi mode
  pcnet32: fix non-napi packet reception
  fix EMAC driver for proper napi_synchronize API
  sky2: shutdown cleanup
  napi_synchronize: waiting for NAPI
  forcedeth msi bugfix
  gianfar: fix obviously wrong #ifdef CONFIG_GFAR_NAPI placement
  fs_enet: Update for API changes
  gianfar: remove orphan struct.
  forcedeth: fix rx-work condition in nv_rx_process_optimized() too

1 files changed, 18 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 452c88d971ad..6f85db3535e2 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -407,6 +407,24 @@ static inline void napi_enable(struct napi_struct *n)
 	clear_bit(NAPI_STATE_SCHED, &n->state);
 }
 
+#ifdef CONFIG_SMP
+/**
+ *	napi_synchronize - wait until NAPI is not running
+ *	@n: napi context
+ *
+ * Wait until NAPI is done being scheduled on this context.
+ * Waits till any outstanding processing completes but
+ * does not disable future activations.
+ */
+static inline void napi_synchronize(const struct napi_struct *n)
+{
+	while (test_bit(NAPI_STATE_SCHED, &n->state))
+		msleep(1);
+}
+#else
+# define napi_synchronize(n)	barrier()
+#endif
+
 /*
  *	The DEVICE structure.
  *	Actually, this whole structure is a big mistake.  It mixes I/O