X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu.c;h=a620b762b4796712bd05efb862de8cb6c53c41fd;hp=4702ba9aea4c1bc55f180b658c28bc56c03dec96;hb=999991c6e4600c410181baea65bda9f406464872;hpb=a77f7d8228bcf1259f8c4121ce02d4763424d45a

diff --git a/urcu.c b/urcu.c
index 4702ba9..a620b76 100644
--- a/urcu.c
+++ b/urcu.c
@@ -37,6 +37,7 @@
 #include <errno.h>
 #include <poll.h>
 
+#include "urcu/arch.h"
 #include "urcu/wfcqueue.h"
 #include "urcu/map/urcu.h"
 #include "urcu/static/urcu.h"
@@ -63,16 +64,9 @@
  */
 #define RCU_QS_ACTIVE_ATTEMPTS 100
 
-/*
- * RCU_MEMBARRIER is only possibly available on Linux.
- */
-#if defined(RCU_MEMBARRIER) && defined(__linux__)
-#include <urcu/syscall-compat.h>
-#endif
-
-/* If the headers do not support SYS_membarrier, fall back on RCU_MB */
-#ifdef SYS_membarrier
-# define membarrier(...)		syscall(SYS_membarrier, __VA_ARGS__)
+/* If the headers do not support membarrier system call, fall back on RCU_MB */
+#ifdef __NR_membarrier
+# define membarrier(...)		syscall(__NR_membarrier, __VA_ARGS__)
 #else
 # define membarrier(...)		-ENOSYS
 #endif
@@ -165,7 +159,7 @@ static void mutex_unlock(pthread_mutex_t *mutex)
 }
 
 #ifdef RCU_MEMBARRIER
-static void smp_mb_master(int group)
+static void smp_mb_master(void)
 {
 	if (caa_likely(rcu_has_sys_membarrier))
 		(void) membarrier(MEMBARRIER_CMD_SHARED, 0);
@@ -175,7 +169,7 @@ static void smp_mb_master(int group)
 #endif
 
 #ifdef RCU_MB
-static void smp_mb_master(int group)
+static void smp_mb_master(void)
 {
 	cmm_smp_mb();
 }
@@ -224,7 +218,7 @@ static void force_mb_all_readers(void)
 	cmm_smp_mb();	/* read ->need_mb before ending the barrier */
 }
 
-static void smp_mb_master(int group)
+static void smp_mb_master(void)
 {
 	force_mb_all_readers();
 }
@@ -236,7 +230,7 @@ static void smp_mb_master(int group)
 static void wait_gp(void)
 {
 	/* Read reader_gp before read futex */
-	smp_mb_master(RCU_MB_GROUP);
+	smp_mb_master();
 	if (uatomic_read(&rcu_gp.futex) != -1)
 		return;
 	while (futex_async(&rcu_gp.futex, FUTEX_WAIT, -1,
@@ -280,7 +274,7 @@ static void wait_for_readers(struct cds_list_head *input_readers,
 		if (wait_loops >= RCU_QS_ACTIVE_ATTEMPTS) {
 			uatomic_dec(&rcu_gp.futex);
 			/* Write futex before read reader_gp */
-			smp_mb_master(RCU_MB_GROUP);
+			smp_mb_master();
 		}
 
 		cds_list_for_each_entry_safe(index, tmp, input_readers, node) {
@@ -310,7 +304,7 @@ static void wait_for_readers(struct cds_list_head *input_readers,
 		if (cds_list_empty(input_readers)) {
 			if (wait_loops >= RCU_QS_ACTIVE_ATTEMPTS) {
 				/* Read reader_gp before write futex */
-				smp_mb_master(RCU_MB_GROUP);
+				smp_mb_master();
 				uatomic_set(&rcu_gp.futex, 0);
 			}
 			break;
@@ -333,13 +327,13 @@ static void wait_for_readers(struct cds_list_head *input_readers,
 		if (cds_list_empty(input_readers)) {
 			if (wait_loops >= RCU_QS_ACTIVE_ATTEMPTS) {
 				/* Read reader_gp before write futex */
-				smp_mb_master(RCU_MB_GROUP);
+				smp_mb_master();
 				uatomic_set(&rcu_gp.futex, 0);
 			}
 			break;
 		} else {
 			if (wait_gp_loops == KICK_READER_LOOPS) {
-				smp_mb_master(RCU_MB_GROUP);
+				smp_mb_master();
 				wait_gp_loops = 0;
 			}
 			/* Temporarily unlock the registry lock. */
@@ -400,7 +394,7 @@ void synchronize_rcu(void)
 	 * because it iterates on reader threads.
 	 */
 	/* Write new ptr before changing the qparity */
-	smp_mb_master(RCU_MB_GROUP);
+	smp_mb_master();
 
 	/*
 	 * Wait for readers to observe original parity or be quiescent.
@@ -461,7 +455,7 @@ void synchronize_rcu(void)
 	 * being freed. Must be done within rcu_registry_lock because it
 	 * iterates on reader threads.
 	 */
-	smp_mb_master(RCU_MB_GROUP);
+	smp_mb_master();
 out:
 	mutex_unlock(&rcu_registry_lock);
 	mutex_unlock(&rcu_gp_lock);