Fix: handle sys_futex() FUTEX_WAIT interrupted by signal

[urcu.git] / urcu / system.h

diff --git a/urcu/system.h b/urcu/system.h
index 6f314595178e98385fd72e9d48c3f82de374081b..faae39055484875b237dd62dd0928e9903725da1 100644 (file)
--- a/urcu/system.h
+++ b/urcu/system.h
@@ -32,6 +32,7 @@
  * Load a data from shared memory, doing a cache flush if required.
  */
 #define CMM_LOAD_SHARED(p)                     \
+       __extension__                   \
        ({                              \
                cmm_smp_rmc();          \
                _CMM_LOAD_SHARED(p);    \
@@ -41,13 +42,14 @@
  * Identify a shared store. A cmm_smp_wmc() or cmm_smp_mc() should
  * follow the store.
  */
-#define _CMM_STORE_SHARED(x, v)        ({ CMM_ACCESS_ONCE(x) = (v); })
+#define _CMM_STORE_SHARED(x, v)        __extension__ ({ CMM_ACCESS_ONCE(x) = (v); })
 
 /*
  * Store v into x, where x is located in shared memory. Performs the
  * required cache flush after writing. Returns v.
  */
 #define CMM_STORE_SHARED(x, v)                                         \
+       __extension__                                                   \
        ({                                                              \
                __typeof__(x) _v = _CMM_STORE_SHARED(x, v);             \
                cmm_smp_wmc();                                          \