[PATCH 49/62] rxrpc: Remove IDR preloading

[Matthew Wilcox]

From: Matthew Wilcox <mawil...@microsoft.com>

The IDR now handles its own locking, so if we remove the locking in
rxrpc, we can also remove the memory preloading.

Signed-off-by: Matthew Wilcox <mawil...@microsoft.com>
---
 net/rxrpc/conn_client.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c
index 7e8bf10fec86..d61fbd359bfa 100644
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -91,7 +91,6 @@ __read_mostly unsigned int rxrpc_conn_idle_client_fast_expiry 
= 2 * HZ;
 /*
  * We use machine-unique IDs for our client connections.
  */
-static DEFINE_SPINLOCK(rxrpc_conn_id_lock);
 int rxrpc_client_conn_cursor;
 DEFINE_IDR(rxrpc_client_conn_ids);
 
@@ -111,12 +110,8 @@ static int rxrpc_get_client_connection_id(struct 
rxrpc_connection *conn,
 
        _enter("");
 
-       idr_preload(gfp);
-       spin_lock(&rxrpc_conn_id_lock);
        id = idr_alloc_cyclic(&rxrpc_client_conn_ids, &rxrpc_client_conn_cursor,
-                               conn, 1, 0x40000000, GFP_NOWAIT);
-       spin_unlock(&rxrpc_conn_id_lock);
-       idr_preload_end();
+                               conn, 1, 0x40000000, gfp);
        if (id < 0)
                goto error;
 
@@ -137,10 +132,8 @@ static int rxrpc_get_client_connection_id(struct 
rxrpc_connection *conn,
 static void rxrpc_put_client_connection_id(struct rxrpc_connection *conn)
 {
        if (test_bit(RXRPC_CONN_HAS_IDR, &conn->flags)) {
-               spin_lock(&rxrpc_conn_id_lock);
                idr_remove(&rxrpc_client_conn_ids,
                           conn->proto.cid >> RXRPC_CIDSHIFT);
-               spin_unlock(&rxrpc_conn_id_lock);
        }
 }
 
-- 
2.15.0