Use struct path in fs_struct

* Use struct path in fs_struct.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 15 insertions, 19 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index 44f6cf23b70e..66aaf52199e9 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1849,8 +1849,7 @@ char * d_path(struct dentry *dentry, struct vfsmount *vfsmnt,
                                 char *buf, int buflen)
 {
         char *res;
-        struct vfsmount *rootmnt;
-        struct dentry *root;
+        struct path root;
 
         /*
          * We have various synthetic filesystems that never get mounted.  On
@@ -1863,14 +1862,13 @@ char * d_path(struct dentry *dentry, struct vfsmount *vfsmnt,
                 return dentry->d_op->d_dname(dentry, buf, buflen);
 
         read_lock(&current->fs->lock);
-        rootmnt = mntget(current->fs->rootmnt);
-        root = dget(current->fs->root);
+        root = current->fs->root;
+        path_get(&current->fs->root);
         read_unlock(&current->fs->lock);
         spin_lock(&dcache_lock);
-        res = __d_path(dentry, vfsmnt, root, rootmnt, buf, buflen);
+        res = __d_path(dentry, vfsmnt, root.dentry, root.mnt, buf, buflen);
         spin_unlock(&dcache_lock);
-        dput(root);
-        mntput(rootmnt);
+        path_put(&root);
         return res;
 }
 
@@ -1916,28 +1914,28 @@ char *dynamic_dname(struct dentry *dentry, char *buffer, int buflen,
 asmlinkage long sys_getcwd(char __user *buf, unsigned long size)
 {
         int error;
-        struct vfsmount *pwdmnt, *rootmnt;
-        struct dentry *pwd, *root;
+        struct path pwd, root;
         char *page = (char *) __get_free_page(GFP_USER);
 
         if (!page)
                 return -ENOMEM;
 
         read_lock(&current->fs->lock);
-        pwdmnt = mntget(current->fs->pwdmnt);
-        pwd = dget(current->fs->pwd);
-        rootmnt = mntget(current->fs->rootmnt);
-        root = dget(current->fs->root);
+        pwd = current->fs->pwd;
+        path_get(&current->fs->pwd);
+        root = current->fs->root;
+        path_get(&current->fs->root);
         read_unlock(&current->fs->lock);
 
         error = -ENOENT;
         /* Has the current directory has been unlinked? */
         spin_lock(&dcache_lock);
-        if (pwd->d_parent == pwd || !d_unhashed(pwd)) {
+        if (pwd.dentry->d_parent == pwd.dentry || !d_unhashed(pwd.dentry)) {
                 unsigned long len;
                 char * cwd;
 
-                cwd = __d_path(pwd, pwdmnt, root, rootmnt, page, PAGE_SIZE);
+                cwd = __d_path(pwd.dentry, pwd.mnt, root.dentry, root.mnt,
+                               page, PAGE_SIZE);
                 spin_unlock(&dcache_lock);
 
                 error = PTR_ERR(cwd);
@@ -1955,10 +1953,8 @@ asmlinkage long sys_getcwd(char __user *buf, unsigned long size)
                 spin_unlock(&dcache_lock);
 
 out:
-        dput(pwd);
-        mntput(pwdmnt);
-        dput(root);
-        mntput(rootmnt);
+        path_put(&pwd);
+        path_put(&root);
         free_page((unsigned long) page);
         return error;
 }