Merge git://git.linux-nfs.org/pub/linux/nfs-2.6

* git://git.linux-nfs.org/pub/linux/nfs-2.6:
  SUNRPC: Replace flush_workqueue() with cancel_work_sync() and friends
  NFS: Replace flush_scheduled_work with cancel_work_sync() and friends
  SUNRPC: Don't call gss_delete_sec_context() from an rcu context
  NFSv4: Don't call put_rpccred() from an rcu callback
  NFS: Fix NFSv4 open stateid regressions
  NFSv4: Fix a locking regression in nfs4_set_mode_locked()
  NFS: Fix put_nfs_open_context
  SUNRPC: Fix a race in rpciod_down()

1 files changed, 8 insertions, 16 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index bca6cdcb9f0d..71a49c3acabd 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -468,7 +468,7 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
                 ctx->lockowner = current->files;
                 ctx->error = 0;
                 ctx->dir_cookie = 0;
-                kref_init(&ctx->kref);
+                atomic_set(&ctx->count, 1);
         }
         return ctx;
 }
@@ -476,21 +476,18 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
 {
         if (ctx != NULL)
-                kref_get(&ctx->kref);
+                atomic_inc(&ctx->count);
         return ctx;
 }
 
-static void nfs_free_open_context(struct kref *kref)
+void put_nfs_open_context(struct nfs_open_context *ctx)
 {
-        struct nfs_open_context *ctx = container_of(kref,
-                        struct nfs_open_context, kref);
+        struct inode *inode = ctx->path.dentry->d_inode;
 
-        if (!list_empty(&ctx->list)) {
-                struct inode *inode = ctx->path.dentry->d_inode;
-                spin_lock(&inode->i_lock);
-                list_del(&ctx->list);
-                spin_unlock(&inode->i_lock);
-        }
+        if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
+                return;
+        list_del(&ctx->list);
+        spin_unlock(&inode->i_lock);
         if (ctx->state != NULL)
                 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
         if (ctx->cred != NULL)
@@ -500,11 +497,6 @@ static void nfs_free_open_context(struct kref *kref)
         kfree(ctx);
 }
 
-void put_nfs_open_context(struct nfs_open_context *ctx)
-{
-        kref_put(&ctx->kref, nfs_free_open_context);
-}
-
 /*
  * Ensure that mmap has a recent RPC credential for use when writing out
  * shared pages