gru: allow users to specify gru chiplet 3

This patch builds on the infrastructure introduced in the patches that
allow user specification of GRU blades & chiplets for context allocation.

This patch simplifies the algorithms for migrating GRU contexts between
blades.

No new functionality is introduced.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 321ad80..9470303 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -362,7 +362,7 @@
 
 	if (!(gts->ts_sizeavail & GRU_SIZEAVAIL(pageshift))) {
 		gts->ts_sizeavail |= GRU_SIZEAVAIL(pageshift);
-		if (atomic || !gru_update_cch(gts, 0)) {
+		if (atomic || !gru_update_cch(gts)) {
 			gts->ts_force_cch_reload = 1;
 			goto failupm;
 		}
@@ -553,14 +553,12 @@
 	 */
 	if (gts->ts_gru && gts->ts_force_cch_reload) {
 		gts->ts_force_cch_reload = 0;
-		gru_update_cch(gts, 0);
+		gru_update_cch(gts);
 	}
 
 	ret = -EAGAIN;
 	cbrnum = thread_cbr_number(gts, ucbnum);
-	if (gts->ts_force_unload) {
-		gru_unload_context(gts, 1);
-	} else if (gts->ts_gru) {
+	if (gts->ts_gru) {
 		tfh = get_tfh_by_index(gts->ts_gru, cbrnum);
 		cbk = get_gseg_base_address_cb(gts->ts_gru->gs_gru_base_vaddr,
 				gts->ts_ctxnum, ucbnum);