5 files changed, 8 insertions, 22 deletions

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index e45cfa8..87eb07f 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -160,13 +160,6 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
 
 	pr_debug("%s\n", __FUNCTION__);
 
-	if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
-		/* SLBs are pre-loaded for context switch, so
-		 * we should never get here!
-		 */
-		printk("%s: invalid access during switch!\n", __func__);
-		return 1;
-	}
 	slb.esid = (ea & ESID_MASK) | SLB_ESID_V;
 
 	switch(REGION_ID(ea)) {
@@ -226,11 +219,6 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
 		return 0;
 	}
 
-	if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
-		printk("%s: invalid access during switch!\n", __func__);
-		return 1;
-	}
-
 	spu->class_0_pending = 0;
 	spu->dar = ea;
 	spu->dsisr = dsisr;
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index fca22e1..6221968 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -234,6 +234,7 @@ static int spu_run_fini(struct spu_context *ctx, u32 *npc,
 	*npc = ctx->ops->npc_read(ctx);
 
 	spuctx_switch_state(ctx, SPU_UTIL_IDLE_LOADED);
+	ctx->policy = SCHED_IDLE;
 	spu_release(ctx);
 
 	if (signal_pending(current))
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 5915343..3a59721 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -856,21 +856,18 @@ static noinline void spusched_tick(struct spu_context *ctx)
 {
 	struct spu_context *new = NULL;
 	struct spu *spu = NULL;
-	u32 status;
 
 	if (spu_acquire(ctx))
 		BUG();	/* a kernel thread never has signals pending */
 
 	if (ctx->state != SPU_STATE_RUNNABLE)
 		goto out;
-	if (spu_stopped(ctx, &status))
-		goto out;
 	if (ctx->flags & SPU_CREATE_NOSCHED)
 		goto out;
 	if (ctx->policy == SCHED_FIFO)
 		goto out;
 
-	if (--ctx->time_slice)
+	if (--ctx->time_slice && ctx->policy != SCHED_IDLE)
 		goto out;
 
 	spu = ctx->spu;
@@ -880,7 +877,8 @@ static noinline void spusched_tick(struct spu_context *ctx)
 	new = grab_runnable_context(ctx->prio + 1, spu->node);
 	if (new) {
 		spu_unschedule(spu, ctx);
-		spu_add_to_rq(ctx);
+		if (ctx->policy != SCHED_IDLE)
+			spu_add_to_rq(ctx);
 	} else {
 		spu_context_nospu_trace(spusched_tick__newslice, ctx);
 		ctx->time_slice++;
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index 6063c88..6f5886c 100644
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -720,8 +720,9 @@ static inline void set_switch_active(struct spu_state *csa, struct spu *spu)
 	 * Restore, Step 23.
 	 *     Change the software context switch pending flag
 	 *     to context switch active.
+	 *
+	 *     This implementation does not uses a switch active flag.
 	 */
-	set_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
 	clear_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags);
 	mb();
 }
@@ -1739,9 +1740,8 @@ static inline void reset_switch_active(struct spu_state *csa, struct spu *spu)
 {
 	/* Restore, Step 74:
 	 *     Reset the "context switch active" flag.
+	 *     Not performed by this implementation.
 	 */
-	clear_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
-	mb();
 }
 
 static inline void reenable_interrupts(struct spu_state *csa, struct spu *spu)
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index f07c99b..e3c845b 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -98,9 +98,8 @@
 #define MFC_PRIV_ATTN_EVENT                 0x00000800
 #define MFC_MULTI_SRC_EVENT                 0x00001000
 
-/* Flags indicating progress during context switch. */
+/* Flag indicating progress during context switch. */
 #define SPU_CONTEXT_SWITCH_PENDING	0UL
-#define SPU_CONTEXT_SWITCH_ACTIVE	1UL
 
 struct spu_context;
 struct spu_runqueue;