X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=urcu-qsbr-static.h;h=22a93b2fd7a823d21c76cbbd1ad5c6bf3b0495e4;hb=47d2f29ead2c92123069ebf7b84c6e48cf91612a;hp=57f0c50a8b899b2db0fc77084b052beb534d9d5e;hpb=a669219f71cabe41a5832bdda98c94e4ad63e529;p=urcu.git

diff --git a/urcu-qsbr-static.h b/urcu-qsbr-static.h
index 57f0c50..22a93b2 100644
--- a/urcu-qsbr-static.h
+++ b/urcu-qsbr-static.h
@@ -173,6 +173,17 @@ extern unsigned long urcu_gp_ctr;
 
 extern unsigned long __thread rcu_reader_qs_gp;
 
+#if (BITS_PER_LONG < 64)
+static inline int rcu_gp_ongoing(unsigned long *value)
+{
+	unsigned long reader_gp;
+
+	if (value == NULL)
+		return 0;
+	reader_gp = LOAD_SHARED(*value);
+	return reader_gp && ((reader_gp ^ urcu_gp_ctr) & RCU_GP_CTR);
+}
+#else /* !(BITS_PER_LONG < 64) */
 static inline int rcu_gp_ongoing(unsigned long *value)
 {
 	unsigned long reader_gp;
@@ -182,6 +193,7 @@ static inline int rcu_gp_ongoing(unsigned long *value)
 	reader_gp = LOAD_SHARED(*value);
 	return reader_gp && (reader_gp - urcu_gp_ctr > ULONG_MAX / 2);
 }
+#endif  /* !(BITS_PER_LONG < 64) */
 
 static inline void _rcu_read_lock(void)
 {