Add spin_delay impl to postgresql11 for arm

geoffreyblake · Nov 1, 2021 · b2633e3 · b2633e3
1 parent 5dd0674
commit b2633e3
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
@@ -337,6 +337,18 @@ tas(volatile slock_t *lock)
 
 #define S_UNLOCK(lock) __sync_lock_release(lock)
 
+#define SPIN_DELAY() spin_delay()
+
+static __inline__ void
+spin_delay(void)
+{
+	/*
+	 * Test using an ISB instruction here instead of a NOP
+	 */
+	__asm__ __volatile__(
+		" isb;			\n");
+}
+
 #endif	 /* HAVE_GCC__SYNC_INT32_TAS */
 #endif	 /* __arm__ || __arm || __aarch64__ || __aarch64 */