GRU Driver V3: fixes to resolve code review comments

Fixes problems identified in a code review:
	- add comment with high level dscription of the GRU
	- prepend "gru_" to all global names
	- delete unused function
	- couple of trivial bug fixes

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-gru/grukservices.c

@@ -638,11 +638,11 @@ int gru_kservices_init(struct gru_state *gru)
 	cpus_possible = uv_blade_nr_possible_cpus(gru->gs_blade_id);
 
 	num = GRU_NUM_KERNEL_CBR * cpus_possible;
-	cbr_map = reserve_gru_cb_resources(gru, GRU_CB_COUNT_TO_AU(num), NULL);
+	cbr_map = gru_reserve_cb_resources(gru, GRU_CB_COUNT_TO_AU(num), NULL);
 	gru->gs_reserved_cbrs += num;
 
 	num = GRU_NUM_KERNEL_DSR_BYTES * cpus_possible;
-	dsr_map = reserve_gru_ds_resources(gru, GRU_DS_BYTES_TO_AU(num), NULL);
+	dsr_map = gru_reserve_ds_resources(gru, GRU_DS_BYTES_TO_AU(num), NULL);
 	gru->gs_reserved_dsr_bytes += num;
 
 	gru->gs_active_contexts++;
@@ -673,7 +673,7 @@ int gru_kservices_init(struct gru_state *gru)
 	}
 	unlock_cch_handle(cch);
 
-	if (options & GRU_QUICKLOOK)
+	if (gru_options & GRU_QUICKLOOK)
 		quicktest(gru);
 	return 0;
 }