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/dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 9f2c134..995d080 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2014,10 +2014,7 @@
 	if (path->dentry->d_op && path->dentry->d_op->d_dname)
 		return path->dentry->d_op->d_dname(path->dentry, buf, buflen);
 
-	read_lock(&current->fs->lock);
-	root = current->fs->root;
-	path_get(&root);
-	read_unlock(&current->fs->lock);
+	get_fs_root(current->fs, &root);
 	spin_lock(&dcache_lock);
 	tmp = root;
 	res = __d_path(path, &tmp, buf, buflen);
@@ -2129,12 +2126,7 @@
 	if (!page)
 		return -ENOMEM;
 
-	read_lock(&current->fs->lock);
-	pwd = current->fs->pwd;
-	path_get(&pwd);
-	root = current->fs->root;
-	path_get(&root);
-	read_unlock(&current->fs->lock);
+	get_fs_root_and_pwd(current->fs, &root, &pwd);
 
 	error = -ENOENT;
 	spin_lock(&dcache_lock);