struct inode	*inode = req->wb_context->dentry->d_inode; struct rpc_clnt	*clnt = NFS_CLIENT(inode);
struct rpc_clnt	*clnt = NFS_CLIENT(req->wb_context->dentry->d_inode); sigset_t oldmask; int ret = 0;
nfs_wait_on_request(struct nfs_page *req){	struct inode	*inode = req->wb_context->dentry->d_inode;        struct rpc_clnt	*clnt = NFS_CLIENT(inode);	if (!NFS_WBACK_BUSY(req))		return 0;	return nfs_wait_event(clnt, req->wb_context->waitq, !NFS_WBACK_BUSY(req));}