jffs2: use generic posix ACL infrastructure

Also don't bother to set up a .get_acl method for symlinks as we do not
support access control (ACLs or even mode bits) for symlinks in Linux.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 09b3ed4..a69e426 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -190,15 +190,16 @@
 
 int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
 {
+	struct inode *inode = dentry->d_inode;
 	int rc;
 
-	rc = inode_change_ok(dentry->d_inode, iattr);
+	rc = inode_change_ok(inode, iattr);
 	if (rc)
 		return rc;
 
-	rc = jffs2_do_setattr(dentry->d_inode, iattr);
+	rc = jffs2_do_setattr(inode, iattr);
 	if (!rc && (iattr->ia_valid & ATTR_MODE))
-		rc = jffs2_acl_chmod(dentry->d_inode);
+		rc = posix_acl_chmod(inode, inode->i_mode);
 
 	return rc;
 }