gru: change context load and unload

Remove "static" from the functions for loading/unloading GRU contexts.
These functions will be called from other GRU files.  Fix bug in unlocking
gru context.

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>

drivers/misc/sgi-gru/grufault.c

@@ -558,8 +558,8 @@ int gru_handle_user_call_os(unsigned long cb)
 	 * CCH may contain stale data if ts_force_cch_reload is set.
 	 */
 	if (gts->ts_gru && gts->ts_force_cch_reload) {
-		gru_update_cch(gts, 0);
 		gts->ts_force_cch_reload = 0;
+		gru_update_cch(gts, 0);
 	}
 
 	ret = -EAGAIN;
@@ -644,7 +644,7 @@ static int gru_unload_all_contexts(void)
 			if (gts && mutex_trylock(&gts->ts_ctxlock)) {
 				spin_unlock(&gru->gs_lock);
 				gru_unload_context(gts, 1);
-				gru_unlock_gts(gts);
+				mutex_unlock(&gts->ts_ctxlock);
 				spin_lock(&gru->gs_lock);
 			}
 		}

drivers/misc/sgi-gru/grumain.c

@@ -533,7 +533,7 @@ void gru_unload_context(struct gru_thread_state *gts, int savestate)
  * Load a GRU context by copying it from the thread data structure in memory
  * to the GRU.
  */
-static void gru_load_context(struct gru_thread_state *gts)
+void gru_load_context(struct gru_thread_state *gts)
 {
 	struct gru_state *gru = gts->ts_gru;
 	struct gru_context_configuration_handle *cch;
@@ -600,8 +600,8 @@ int gru_update_cch(struct gru_thread_state *gts, int force_unload)
 			gts->ts_tlb_int_select = gru_cpu_fault_map_id();
 			cch->tlb_int_select = gru_cpu_fault_map_id();
 			cch->tfm_fault_bit_enable =
-	    		    (gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
-	     		    || gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
+				(gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
+				|| gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
 		} else {
 			for (i = 0; i < 8; i++)
 				cch->asid[i] = 0;
@@ -645,7 +645,7 @@ static int gru_retarget_intr(struct gru_thread_state *gts)
 #define next_gru(b, g)	(((g) < &(b)->bs_grus[GRU_CHIPLETS_PER_BLADE - 1]) ?  \
 				 ((g)+1) : &(b)->bs_grus[0])
 
-static void gru_steal_context(struct gru_thread_state *gts, int blade_id)
+void gru_steal_context(struct gru_thread_state *gts, int blade_id)
 {
 	struct gru_blade_state *blade;
 	struct gru_state *gru, *gru0;
@@ -711,7 +711,7 @@ static void gru_steal_context(struct gru_thread_state *gts, int blade_id)
 /*
  * Scan the GRUs on the local blade & assign a GRU context.
  */
-static struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts,
+struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts,
 						int blade)
 {
 	struct gru_state *gru, *grux;

drivers/misc/sgi-gru/grutables.h

@@ -611,6 +611,10 @@ extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
 				*vma, int tsid);
 extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
 				*vma, int tsid);
+extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts,
+		int blade);
+extern void gru_load_context(struct gru_thread_state *gts);
+extern void gru_steal_context(struct gru_thread_state *gts, int blade_id);
 extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
 extern int gru_update_cch(struct gru_thread_state *gts, int force_unload);
 extern void gts_drop(struct gru_thread_state *gts);