diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2013-07-02 02:05:14 -0400 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-07-02 02:12:05 -0400 |
| commit | 0d69a65e97fc8090ee83c8639137b4b5c8ece237 (patch) | |
| tree | 93e2bc0c120bf31c6ed70a95ad95317417df5e3e /tools/lguest | |
| parent | 8fd9a6365eb8a79a2d8f0e0baa01f4db6345e8dd (diff) | |
tools/lguest: real barriers.
Lguest guests are UP, but the host is probably SMP, so real barriers are
required in case the device thread and the guest are on different CPUs.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'tools/lguest')
| -rw-r--r-- | tools/lguest/lguest.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/lguest/lguest.c b/tools/lguest/lguest.c index 49ed25b5bbb9..a64f5cb0c15b 100644 --- a/tools/lguest/lguest.c +++ b/tools/lguest/lguest.c | |||
| @@ -177,8 +177,8 @@ static struct termios orig_term; | |||
| 177 | * in precise order. | 177 | * in precise order. |
| 178 | */ | 178 | */ |
| 179 | #define wmb() __asm__ __volatile__("" : : : "memory") | 179 | #define wmb() __asm__ __volatile__("" : : : "memory") |
| 180 | #define rmb() __asm__ __volatile__("" : : : "memory") | 180 | #define rmb() __asm__ __volatile__("lock; addl $0,0(%%esp)" : : : "memory") |
| 181 | #define mb() __asm__ __volatile__("" : : : "memory") | 181 | #define mb() __asm__ __volatile__("lock; addl $0,0(%%esp)" : : : "memory") |
| 182 | 182 | ||
| 183 | /* Wrapper for the last available index. Makes it easier to change. */ | 183 | /* Wrapper for the last available index. Makes it easier to change. */ |
| 184 | #define lg_last_avail(vq) ((vq)->last_avail_idx) | 184 | #define lg_last_avail(vq) ((vq)->last_avail_idx) |