Merge branch 'nfs-for-2.6.36' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6

* 'nfs-for-2.6.36' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (42 commits)
  NFS: NFSv4.1 is no longer a "developer only" feature
  NFS: NFS_V4 is no longer an EXPERIMENTAL feature
  NFS: Fix /proc/mount for legacy binary interface
  NFS: Fix the locking in nfs4_callback_getattr
  SUNRPC: Defer deleting the security context until gss_do_free_ctx()
  SUNRPC: prevent task_cleanup running on freed xprt
  SUNRPC: Reduce asynchronous RPC task stack usage
  SUNRPC: Move the bound cred to struct rpc_rqst
  SUNRPC: Clean up of rpc_bindcred()
  SUNRPC: Move remaining RPC client related task initialisation into clnt.c
  SUNRPC: Ensure that rpc_exit() always wakes up a sleeping task
  SUNRPC: Make the credential cache hashtable size configurable
  SUNRPC: Store the hashtable size in struct rpc_cred_cache
  NFS: Ensure the AUTH_UNIX credcache is allocated dynamically
  NFS: Fix the NFS users of rpc_restart_call()
  SUNRPC: The function rpc_restart_call() should return success/failure
  NFSv4: Get rid of the bogus RPC_ASSASSINATED(task) checks
  NFSv4: Clean up the process of renewing the NFSv4 lease
  NFSv4.1: Handle NFS4ERR_DELAY on SEQUENCE correctly
  NFS: nfs_rename() should not have to flush out writebacks
  ...

1 files changed, 4 insertions, 15 deletions

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index a08770a7e857..930d10fecdaf 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -37,8 +37,8 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *
         if (inode == NULL)
                 goto out_putclient;
         nfsi = NFS_I(inode);
-        down_read(&nfsi->rwsem);
-        delegation = nfsi->delegation;
+        rcu_read_lock();
+        delegation = rcu_dereference(nfsi->delegation);
         if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
                 goto out_iput;
         res->size = i_size_read(inode);
@@ -53,7 +53,7 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *
                 args->bitmap[1];
         res->status = 0;
 out_iput:
-        up_read(&nfsi->rwsem);
+        rcu_read_unlock();
         iput(inode);
 out_putclient:
         nfs_put_client(clp);
@@ -62,16 +62,6 @@ out:
         return res->status;
 }
 
-static int (*nfs_validate_delegation_stateid(struct nfs_client *clp))(struct nfs_delegation *, const nfs4_stateid *)
-{
-#if defined(CONFIG_NFS_V4_1)
-        if (clp->cl_minorversion > 0)
-                return nfs41_validate_delegation_stateid;
-#endif
-        return nfs4_validate_delegation_stateid;
-}
-
-
 __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
 {
         struct nfs_client *clp;
@@ -92,8 +82,7 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
                 inode = nfs_delegation_find_inode(clp, &args->fh);
                 if (inode != NULL) {
                         /* Set up a helper thread to actually return the delegation */
-                        switch (nfs_async_inode_return_delegation(inode, &args->stateid,
-                                                                  nfs_validate_delegation_stateid(clp))) {
+                        switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
                                 case 0:
                                         res = 0;
                                         break;