- bump __FreeBSD version to reflect added buf_ring, memory barriers,

  and ifnet functions

- add memory barriers to <machine/atomic.h>
- update drivers to only conditionally define their own

- add lockless producer / consumer ring buffer
- remove ring buffer implementation from cxgb and update its callers

- add if_transmit(struct ifnet *ifp, struct mbuf *m) to ifnet to
  allow drivers to efficiently manage multiple hardware queues
  (i.e. not serialize all packets through one ifq)
- expose if_qflush to allow drivers to flush any driver managed queues

This work was supported by Bitgravity Inc. and Chelsio Inc.

1 files changed, 0 insertions, 9 deletions

diff --git a/sys/i386/include/xen/xen-os.h b/sys/i386/include/xen/xen-os.h
index 98341b6..dac071a 100644
--- a/sys/i386/include/xen/xen-os.h
+++ b/sys/i386/include/xen/xen-os.h
@@ -165,15 +165,6 @@ do {                                                                    \
 #define spin_unlock_irqrestore mtx_unlock_irqrestore
 
 
-#ifndef mb
-#define mb() __asm__ __volatile__("lock; addl $0, 0(%%esp)": : :"memory")
-#endif
-#ifndef rmb
-#define rmb() mb()
-#endif
-#ifndef wmb
-#define wmb() barrier()
-#endif
 #ifdef SMP
 #define smp_mb() mb() 
 #define smp_rmb() rmb()