Michael S. Tsirkin 234927540e xen/events: use virt_xxx barriers ...

drivers/xen/events/events_fifo.c uses rmb() to communicate with the
other side.

For guests compiled with CONFIG_SMP, smp_rmb would be sufficient, so
rmb() here is only needed if a non-SMP guest runs on an SMP host.

Switch to the virt_rmb barrier which serves this exact purpose.

Pull in asm/barrier.h here to make sure the file is self-contained.

Suggested-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

2016-01-12 20:47:04 +02:00

..

events_2l.c

xen/events: Clear cpu_evtchn_mask before resuming

2015-05-05 18:27:11 +01:00

events_base.c

xen/events: Always allocate legacy interrupts on PV guests

2015-11-26 18:05:01 +00:00

events_fifo.c

xen/events: use virt_xxx barriers

2016-01-12 20:47:04 +02:00

events_internal.h

Revert "xen/events/fifo: Handle linked events when closing a port"

2015-08-11 11:05:42 +01:00

Makefile

xen/events: use the FIFO-based ABI if available

2014-01-06 10:07:57 -05:00