Introduce path_put()

* Add path_put() functions for releasing a reference to the dentry and
  vfsmount of a struct path in the right order

* Switch from path_release(nd) to path_put(&nd->path)

* Rename dput_path() to path_put_conditional()

[akpm@linux-foundation.org: fix cifs]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 10 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index 5d9fd4c6d1f5..c77eedd2ac66 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1007,7 +1007,7 @@ static noinline int do_loopback(struct nameidata *nd, char *old_name,
 
 out:
         up_write(&namespace_sem);
-        path_release(&old_nd);
+        path_put(&old_nd.path);
         return err;
 }
 
@@ -1126,8 +1126,8 @@ out1:
 out:
         up_write(&namespace_sem);
         if (!err)
-                path_release(&parent_nd);
-        path_release(&old_nd);
+                path_put(&parent_nd.path);
+        path_put(&old_nd.path);
         return err;
 }
 
@@ -1512,7 +1512,7 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
                 retval = do_new_mount(&nd, type_page, flags, mnt_flags,
                                       dev_name, data_page);
 dput_out:
-        path_release(&nd);
+        path_put(&nd.path);
         return retval;
 }
 
@@ -1768,7 +1768,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
 
         error = security_sb_pivotroot(&old_nd, &new_nd);
         if (error) {
-                path_release(&old_nd);
+                path_put(&old_nd.path);
                 goto out1;
         }
 
@@ -1831,15 +1831,15 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
         chroot_fs_refs(&user_nd, &new_nd);
         security_sb_post_pivotroot(&user_nd, &new_nd);
         error = 0;
-        path_release(&root_parent);
-        path_release(&parent_nd);
+        path_put(&root_parent.path);
+        path_put(&parent_nd.path);
 out2:
         mutex_unlock(&old_nd.path.dentry->d_inode->i_mutex);
         up_write(&namespace_sem);
-        path_release(&user_nd);
-        path_release(&old_nd);
+        path_put(&user_nd.path);
+        path_put(&old_nd.path);
 out1:
-        path_release(&new_nd);
+        path_put(&new_nd.path);
 out0:
         unlock_kernel();
         return error;