NFSv4: Remove nfs4_client->cl_sem from close() path

 We no longer need to worry about collisions between close() and the state
 recovery code, since the new close will automatically recheck the
 file state once it is done waiting on its sequence slot.

 Ditto for the nfs4_proc_locku() procedure.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 86c08c165ce7..bb3574361958 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -481,17 +481,15 @@ void nfs4_put_open_state(struct nfs4_state *state)
 }
 
 /*
- * Beware! Caller must be holding no references to clp->cl_sem!
+ * Close the current file.
  */
 void nfs4_close_state(struct nfs4_state *state, mode_t mode)
 {
 	struct inode *inode = state->inode;
 	struct nfs4_state_owner *owner = state->owner;
-	struct nfs4_client *clp = owner->so_client;
 	int newstate;
 
 	atomic_inc(&owner->so_count);
-	down_read(&clp->cl_sem);
 	/* Protect against nfs4_find_state() */
 	spin_lock(&inode->i_lock);
 	if (mode & FMODE_READ)
@@ -523,7 +521,6 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
 out:
 	nfs4_put_open_state(state);
 	nfs4_put_state_owner(owner);
-	up_read(&clp->cl_sem);
 }
 
 /*
@@ -704,8 +701,6 @@ void nfs_free_seqid(struct nfs_seqid *seqid)
 }
 
 /*
- * Called with clp->cl_sem held.
- *
  * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
  * failed with a seqid incrementing error -
  * see comments nfs_fs.h:seqid_mutating_error()
@@ -743,8 +738,6 @@ void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid)
 }
 
 /*
- * Called with clp->cl_sem held.
- *
  * Increment the seqid if the LOCK/LOCKU succeeded, or
  * failed with a seqid incrementing error -
  * see comments nfs_fs.h:seqid_mutating_error()