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Commit 0d69a65e authored by Rusty Russell's avatar Rusty Russell
Browse files

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: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 8fd9a636

tools/lguest/lguest.c

+2 −2
Original line number Diff line number Diff line
@@ -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)