Commit 491847f3 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by David S. Miller
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tools/virtio: fix smp_mb on x86

Offset 128 overlaps the last word of the redzone.
Use 132 which is always beyond that.
Signed-off-by: default avatarMichael S. Tsirkin <>
Signed-off-by: default avatarDavid S. Miller <>
parent b4eab7de
......@@ -111,7 +111,7 @@ static inline void busy_wait(void)
#if defined(__x86_64__) || defined(__i386__)
#define smp_mb() asm volatile("lock; addl $0,-128(%%rsp)" ::: "memory", "cc")
#define smp_mb() asm volatile("lock; addl $0,-132(%%rsp)" ::: "memory", "cc")
* Not using __ATOMIC_SEQ_CST since gcc docs say they are only synchronized
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