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| author | Rusty Russell <rusty@rustcorp.com.au> | 2013-07-02 15:35:14 +0930 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-07-02 15:42:05 +0930 |
| commit | 0d69a65e97fc8090ee83c8639137b4b5c8ece237 (patch) | |
| tree | 93e2bc0c120bf31c6ed70a95ad95317417df5e3e | |
| 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>
| -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; * in precise order. */ #define wmb() __asm__ __volatile__("" : : : "memory") -#define rmb() __asm__ __volatile__("" : : : "memory") -#define mb() __asm__ __volatile__("" : : : "memory") +#define rmb() __asm__ __volatile__("lock; addl $0,0(%%esp)" : : : "memory") +#define mb() __asm__ __volatile__("lock; addl $0,0(%%esp)" : : : "memory") /* Wrapper for the last available index. Makes it easier to change. */ #define lg_last_avail(vq) ((vq)->last_avail_idx) |