NFS: Add a ->migratepage() aop for NFS
Make NFS a bit more friendly to NUMA and memory hot removal...
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 7dd90a6..e2ccb4a 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -248,6 +248,12 @@
/* write.c */
extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
+#ifdef CONFIG_MIGRATION
+extern int nfs_migrate_page(struct address_space *,
+ struct page *, struct page *);
+#else
+#define nfs_migrate_page NULL
+#endif
/* nfs4proc.c */
extern int _nfs4_call_sync(struct nfs_server *server,
