rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER

When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.

Convert all rcu_assign_pointer of NULL value.

//smpl
@@ expression P; @@

- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)

// </smpl>

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 364eb45e989d..d4132754cbe1 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -122,7 +122,7 @@ gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
         if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags))
                 return;
         gss_get_ctx(ctx);
-        rcu_assign_pointer(gss_cred->gc_ctx, ctx);
+        RCU_INIT_POINTER(gss_cred->gc_ctx, ctx);
         set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         smp_mb__before_clear_bit();
         clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags);
@@ -970,7 +970,7 @@ gss_destroy_nullcred(struct rpc_cred *cred)
         struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
         struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
 
-        rcu_assign_pointer(gss_cred->gc_ctx, NULL);
+        RCU_INIT_POINTER(gss_cred->gc_ctx, NULL);
         call_rcu(&cred->cr_rcu, gss_free_cred_callback);
         if (ctx)
                 gss_put_ctx(ctx);