diff options
Diffstat (limited to 'hw/virtio/vhost.c')
| -rw-r--r-- | hw/virtio/vhost.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 96ab62517a..8f6ab130ee 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -16,6 +16,7 @@ #include <sys/ioctl.h> #include "hw/virtio/vhost.h" #include "hw/hw.h" +#include "qemu/atomic.h" #include "qemu/range.h" #include <linux/vhost.h> #include "exec/address-spaces.h" @@ -47,11 +48,9 @@ static void vhost_dev_sync_region(struct vhost_dev *dev, addr += VHOST_LOG_CHUNK; continue; } - /* Data must be read atomically. We don't really - * need the barrier semantics of __sync - * builtins, but it's easier to use them than - * roll our own. */ - log = __sync_fetch_and_and(from, 0); + /* Data must be read atomically. We don't really need barrier semantics + * but it's easier to use atomic_* than roll our own. */ + log = atomic_xchg(from, 0); while ((bit = sizeof(log) > sizeof(int) ? ffsll(log) : ffs(log))) { hwaddr page_addr; |