*lock: Simplify initialization semantics.

Compiler barrier used for backwards compatibility.

include/spinlock/anderson.h

@@ -83,7 +83,7 @@ ck_spinlock_anderson_init(struct ck_spinlock_anderson *lock,
 	else
 		lock->wrap = 0;
 
-	ck_pr_fence_store();
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/cas.h

@@ -49,7 +49,8 @@ CK_CC_INLINE static void
 ck_spinlock_cas_init(struct ck_spinlock_cas *lock)
 {
 
-	ck_pr_store_uint(&lock->value, false);
+	lock->value = false;
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/clh.h

@@ -46,10 +46,10 @@ CK_CC_INLINE static void
 ck_spinlock_clh_init(struct ck_spinlock_clh **lock, struct ck_spinlock_clh *unowned)
 {
 
-	ck_pr_store_ptr(&unowned->previous, NULL);
-	ck_pr_store_uint(&unowned->wait, false);
-	ck_pr_store_ptr(lock, unowned);
-	ck_pr_fence_store();
+	unowned->previous = NULL;
+	unowned->wait = false;
+	*lock = unowned;
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/dec.h

@@ -51,7 +51,8 @@ CK_CC_INLINE static void
 ck_spinlock_dec_init(struct ck_spinlock_dec *lock)
 {
 
-	ck_pr_store_uint(&lock->value, 1);
+	lock->value = 1;
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/fas.h

@@ -47,7 +47,8 @@ CK_CC_INLINE static void
 ck_spinlock_fas_init(struct ck_spinlock_fas *lock)
 {
 
-	ck_pr_store_uint(&lock->value, false);
+	lock->value = false;
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/hclh.h

@@ -49,12 +49,12 @@ ck_spinlock_hclh_init(struct ck_spinlock_hclh **lock,
     int cluster_id)
 {
 
-	ck_pr_store_ptr(&unowned->previous, NULL);
-	ck_pr_store_uint(&unowned->wait, false);
-	ck_pr_store_uint(&unowned->splice, false);
-	ck_pr_store_int(&unowned->cluster_id, cluster_id);
-	ck_pr_store_ptr(lock, unowned);
-	ck_pr_fence_store();
+	unowned->previous = NULL;
+	unowned->wait = false;
+	unowned->splice = false;
+	unowned->cluster_id = cluster_id;
+	*lock = unowned;
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/mcs.h

@@ -48,7 +48,8 @@ CK_CC_INLINE static void
 ck_spinlock_mcs_init(struct ck_spinlock_mcs **queue)
 {
 
-	ck_pr_store_ptr(queue, NULL);
+	*queue = NULL;
+	ck_pr_barrier();
 	return;
 }
 

include/spinlock/ticket.h

@@ -79,7 +79,7 @@ ck_spinlock_ticket_init(struct ck_spinlock_ticket *ticket)
 {
 
 	ticket->value = 0;
-	ck_pr_fence_store();
+	ck_pr_barrier();
 	return;
 }
 
@@ -203,7 +203,7 @@ ck_spinlock_ticket_init(struct ck_spinlock_ticket *ticket)
 
 	ticket->next = 0;
 	ticket->position = 0;
-	ck_pr_fence_store();
+	ck_pr_barrier();
 
 	return;
 }