diff options
| -rw-r--r-- | include/qemu/atomic.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h index c493f89059..c4f6950fcb 100644 --- a/include/qemu/atomic.h +++ b/include/qemu/atomic.h @@ -92,6 +92,12 @@ /* Weak atomic operations prevent the compiler moving other * loads/stores past the atomic operation load/store. However there is * no explicit memory barrier for the processor. + * + * The C11 memory model says that variables that are accessed from + * different threads should at least be done with __ATOMIC_RELAXED + * primitives or the result is undefined. Generally this has little to + * no effect on the generated code but not using the atomic primitives + * will get flagged by sanitizers as a violation. */ #define atomic_read(ptr) \ ({ \ |