commit f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79
author Miklos Szeredi <mszeredi@suse.cz> Tue Aug 10 11:41:36 2010 +0200
committer Al Viro <viro@zeniv.linux.org.uk> Wed Aug 11 00:28:20 2010 -0400
tree dc9b09188bab35320200f318b5e7b52f24dc43ad
parent 542ce7a9bc6b3838832ae0f4f8de30c667af8ff3

vfs: add helpers to get root and pwd

Add three helpers that retrieve a refcounted copy of the root and cwd
from the supplied fs_struct.

 get_fs_root()
 get_fs_pwd()
 get_fs_root_and_pwd()

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index 66c4f7e..7972e51 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2213,10 +2213,7 @@
 		goto out1;
 	}
 
-	read_lock(&current->fs->lock);
-	root = current->fs->root;
-	path_get(&current->fs->root);
-	read_unlock(&current->fs->lock);
+	get_fs_root(current->fs, &root);
 	down_write(&namespace_sem);
 	mutex_lock(&old.dentry->d_inode->i_mutex);
 	error = -EINVAL;