Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next

Pull core locking updates from Ingo Molnar:
 "The main changes in this cycle were:

   - reduced/streamlined smp_mb__*() interface that allows more usecases
     and makes the existing ones less buggy, especially in rarer
     architectures

   - add rwsem implementation comments

   - bump up lockdep limits"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
  rwsem: Add comments to explain the meaning of the rwsem's count field
  lockdep: Increase static allocations
  arch: Mass conversion of smp_mb__*()
  arch,doc: Convert smp_mb__*()
  arch,xtensa: Convert smp_mb__*()
  arch,x86: Convert smp_mb__*()
  arch,tile: Convert smp_mb__*()
  arch,sparc: Convert smp_mb__*()
  arch,sh: Convert smp_mb__*()
  arch,score: Convert smp_mb__*()
  arch,s390: Convert smp_mb__*()
  arch,powerpc: Convert smp_mb__*()
  arch,parisc: Convert smp_mb__*()
  arch,openrisc: Convert smp_mb__*()
  arch,mn10300: Convert smp_mb__*()
  arch,mips: Convert smp_mb__*()
  arch,metag: Convert smp_mb__*()
  arch,m68k: Convert smp_mb__*()
  arch,m32r: Convert smp_mb__*()
  arch,ia64: Convert smp_mb__*()
  ...

4 files changed, 8 insertions, 8 deletions

diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index b7ebe23cdedf..d67de453c35a 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -598,7 +598,7 @@ static void rds_ib_set_ack(struct rds_ib_connection *ic, u64 seq,
 {
 	atomic64_set(&ic->i_ack_next, seq);
 	if (ack_required) {
-		smp_mb__before_clear_bit();
+		smp_mb__before_atomic();
 		set_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);
 	}
 }
@@ -606,7 +606,7 @@ static void rds_ib_set_ack(struct rds_ib_connection *ic, u64 seq,
 static u64 rds_ib_get_ack(struct rds_ib_connection *ic)
 {
 	clear_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);
-	smp_mb__after_clear_bit();
+	smp_mb__after_atomic();
 
 	return atomic64_read(&ic->i_ack_next);
 }
diff --git a/net/rds/iw_recv.c b/net/rds/iw_recv.c
index 45033358358e..aa8bf6786008 100644
--- a/net/rds/iw_recv.c
+++ b/net/rds/iw_recv.c
@@ -429,7 +429,7 @@ static void rds_iw_set_ack(struct rds_iw_connection *ic, u64 seq,
 {
 	atomic64_set(&ic->i_ack_next, seq);
 	if (ack_required) {
-		smp_mb__before_clear_bit();
+		smp_mb__before_atomic();
 		set_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);
 	}
 }
@@ -437,7 +437,7 @@ static void rds_iw_set_ack(struct rds_iw_connection *ic, u64 seq,
 static u64 rds_iw_get_ack(struct rds_iw_connection *ic)
 {
 	clear_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);
-	smp_mb__after_clear_bit();
+	smp_mb__after_atomic();
 
 	return atomic64_read(&ic->i_ack_next);
 }
diff --git a/net/rds/send.c b/net/rds/send.c
index a82fb660ec00..23718160d71e 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -107,7 +107,7 @@ static int acquire_in_xmit(struct rds_connection *conn)
 static void release_in_xmit(struct rds_connection *conn)
 {
 	clear_bit(RDS_IN_XMIT, &conn->c_flags);
-	smp_mb__after_clear_bit();
+	smp_mb__after_atomic();
 	/*
 	 * We don't use wait_on_bit()/wake_up_bit() because our waking is in a
 	 * hot path and finding waiters is very rare.  We don't want to walk
@@ -661,7 +661,7 @@ void rds_send_drop_acked(struct rds_connection *conn, u64 ack,
 
 	/* order flag updates with spin locks */
 	if (!list_empty(&list))
-		smp_mb__after_clear_bit();
+		smp_mb__after_atomic();
 
 	spin_unlock_irqrestore(&conn->c_lock, flags);
 
@@ -691,7 +691,7 @@ void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest)
 	}
 
 	/* order flag updates with the rs lock */
-	smp_mb__after_clear_bit();
+	smp_mb__after_atomic();
 
 	spin_unlock_irqrestore(&rs->rs_lock, flags);
 
diff --git a/net/rds/tcp_send.c b/net/rds/tcp_send.c
index 81cf5a4c5e40..53b17ca0dff5 100644
--- a/net/rds/tcp_send.c
+++ b/net/rds/tcp_send.c
@@ -93,7 +93,7 @@ int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
 		rm->m_ack_seq = tc->t_last_sent_nxt +
 				sizeof(struct rds_header) +
 				be32_to_cpu(rm->m_inc.i_hdr.h_len) - 1;
-		smp_mb__before_clear_bit();
+		smp_mb__before_atomic();
 		set_bit(RDS_MSG_HAS_ACK_SEQ, &rm->m_flags);
 		tc->t_last_expected_una = rm->m_ack_seq + 1;