diff options
Diffstat (limited to 'sys/amd64/include/atomic.h')
| -rw-r--r-- | sys/amd64/include/atomic.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/amd64/include/atomic.h b/sys/amd64/include/atomic.h index 0edbfff52ff7..d2a3846172d9 100644 --- a/sys/amd64/include/atomic.h +++ b/sys/amd64/include/atomic.h @@ -32,6 +32,10 @@ #error this file needs sys/cdefs.h as a prerequisite #endif +#define mb() __asm__ __volatile__ ("mfence;": : :"memory") +#define wmb() __asm__ __volatile__ ("sfence;": : :"memory") +#define rmb() __asm__ __volatile__ ("lfence;": : :"memory") + /* * Various simple operations on memory, each of which is atomic in the * presence of interrupts and multiple processors. |